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medutest

Page 3 of 6 · 126 questions tagged medutest.

126 questions · sorted by votes · page 3 of 6

24 votes 4 answers16k views
How do I read an orforglipron chromatogram from Medu Laboratories beyond the headline number?

Setup, so nobody has to ask: orforglipron · Medu Laboratories. I would like help reading this properly rather than being told what conclusion to reach. I have the full report…

hplc
hplc

Reverse-phase high-performance liquid chromatography, the workhorse purity method. Column chemistry, mobile-phase choice, gradient slope,…

503 questions
purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

771 questions
orforglipron
orforglipron

A non-peptide, orally bioavailable small-molecule GLP-1 receptor agonist studied in the ATTAIN programme. It is not a peptide, which changes…

219 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by leah_ferrers 12k · 8 months ago
24 votes 5 answers8.6k views
Is a 99.4% result from VendorInvestigator comparable to 95.2% from Medu Laboratories?

Concretely: 99.4% · VendorInvestigator · 95.2% · Medu Laboratories. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
reference-standard
reference-standard

Certified reference materials and in-house standards: traceability, the certificate of the standard itself, system suitability, and why every…

185 questions
vendor-investigate
vendor-investigate

VendorInvestigator, an independent vendor review and verification service. Use this tag for questions about its verification criteria, what a…

113 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by day_seven_trough 6.7k · 3 months ago
23 votes5 answers14k views
Is a 97.1% result from Medu Laboratories comparable to 97.9% from Janoshik?

Setup, so nobody has to ask: 97.1% · Medu Laboratories · 97.9% · Janoshik. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
reference-standard
reference-standard

Certified reference materials and in-house standards: traceability, the certificate of the standard itself, system suitability, and why every…

185 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
janoshik
janoshik

Janoshik Analytical, an independent third-party testing laboratory widely used by this community for HPLC purity, identity and quantified content…

139 questions
asked by ruaidhri_o_shea 25k · 21 months ago
23 votes 2 answers12k views
How do I reconcile 98.2% from Medu Laboratories with 96.4% from the supplier?

What I am working with: 98.2% · Medu Laboratories · 96.4%. This is not behaving the way I expected and I want to understand the discrepancy before I act on it. I have…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

771 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by net_peptide 12k · 11 months ago
22 votes5 answers17k views
Is a 97.1% result from PeptideDetective comparable to 96.8% from Medu Laboratories?

For reference: 97.1% · PeptideDetective · 96.8% · Medu Laboratories. I am trying to choose between two options that are usually discussed as though only one exists. I am not…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
reference-standard
reference-standard

Certified reference materials and in-house standards: traceability, the certificate of the standard itself, system suitability, and why every…

185 questions
peptidemeter
peptidemeter

PeptideDetective, an independent peptide analytics and vendor-rating service. Use this tag for its published datasets, its rating methodology, and how…

107 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by pierce_count 24k · 8 months ago
22 votes 5 answers16k views
Is a 98.4% result from PeptideDetective comparable to 98.2% from Medu Laboratories?

The specifics, since they change the answer: 98.4% · PeptideDetective · 98.2% · Medu Laboratories. The comparison I want does not seem to exist anywhere in a form I can evaluate.…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
reference-standard
reference-standard

Certified reference materials and in-house standards: traceability, the certificate of the standard itself, system suitability, and why every…

185 questions
peptidemeter
peptidemeter

PeptideDetective, an independent peptide analytics and vendor-rating service. Use this tag for its published datasets, its rating methodology, and how…

107 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by s_bhattacharya 31k · 5 months ago
22 votes5 answers15k views
How do I reconcile 97.6% from Medu Laboratories with 98.2% from the supplier?

Stated plainly: 97.6% · Medu Laboratories · 98.2%. I noticed this today and I have not touched anything since, in case the state is diagnostic. I have not discarded anything…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

771 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by tare_and_weigh 12k · 15 months ago
22 votes0 answers15k views
How do I read a dulaglutide chromatogram from Medu Laboratories beyond the headline number?

The particulars: dulaglutide · Medu Laboratories. I have read the primary source rather than the summary, which has left me with more questions. I understand the headline. I…

hplc
hplc

Reverse-phase high-performance liquid chromatography, the workhorse purity method. Column chemistry, mobile-phase choice, gradient slope,…

503 questions
purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

771 questions
dulaglutide
dulaglutide

A once-weekly GLP-1 receptor agonist built on an Fc fusion rather than fatty-acid acylation. Use this tag for questions about the fusion-protein…

200 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by bufferline42 30k · 15 months ago
22 votes5 answers13k views
How do I reconcile 96.4% from Medu Laboratories with 97.1% from the supplier?

What I am working with: 96.4% · Medu Laboratories · 97.1%. This is not behaving the way I expected and I want to understand the discrepancy before I act on it. I have…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

771 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by forty_units 16k · 10 months ago
22 votes 3 answers9.5k views
How do VendorInvestigator and PeptideDetective compare on the same cagrilintide batch?

What I am working with: VendorInvestigator · PeptideDetective · cagrilintide. I am trying to choose between two options that are usually discussed as though only one…

janoshik
janoshik

Janoshik Analytical, an independent third-party testing laboratory widely used by this community for HPLC purity, identity and quantified content…

139 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
vendor-investigate
vendor-investigate

VendorInvestigator, an independent vendor review and verification service. Use this tag for questions about its verification criteria, what a…

113 questions
peptidemeter
peptidemeter

PeptideDetective, an independent peptide analytics and vendor-rating service. Use this tag for its published datasets, its rating methodology, and how…

107 questions
asked by zainab_mustafa 21k · 3 months ago
22 votes2 answers6.3k views
Is a 98.8% result from Medu Laboratories comparable to 98.4% from Janoshik?

Setup, so nobody has to ask: 98.8% · Medu Laboratories · 98.4% · Janoshik. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
reference-standard
reference-standard

Certified reference materials and in-house standards: traceability, the certificate of the standard itself, system suitability, and why every…

185 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
janoshik
janoshik

Janoshik Analytical, an independent third-party testing laboratory widely used by this community for HPLC purity, identity and quantified content…

139 questions
asked by pk_curve 30k · 7 months ago
22 votes 4 answers4.9k views
How do I reconcile 97.9% from Medu Laboratories with 95.2% from the supplier?

Stated plainly: 97.9% · Medu Laboratories · 95.2%. I noticed this today and I have not touched anything since, in case the state is diagnostic. I have not discarded anything…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

771 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by s_bhattacharya 31k · 4 months ago
21 votes5 answers24k views
Is a 97.9% result from Medu Laboratories comparable to 96.4% from PeptideDetective?

Stated plainly: 97.9% · Medu Laboratories · 96.4% · PeptideDetective. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I can…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
reference-standard
reference-standard

Certified reference materials and in-house standards: traceability, the certificate of the standard itself, system suitability, and why every…

185 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
peptidemeter
peptidemeter

PeptideDetective, an independent peptide analytics and vendor-rating service. Use this tag for its published datasets, its rating methodology, and how…

107 questions
asked by petra_hovland 35k · 11 months ago
21 votes 5 answers16k views
Why would Medu Laboratories report 97.1% where the supplier certificate says something higher?

Details up front: Medu Laboratories · 97.1%. I have a result I cannot explain, and I would rather diagnose it than guess. I have checked the obvious explanations and…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
hplc
hplc

Reverse-phase high-performance liquid chromatography, the workhorse purity method. Column chemistry, mobile-phase choice, gradient slope,…

503 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by tamsin_wray 9.9k · 9 months ago
21 votes5 answers12k views
How do I reconcile 97.9% from Medu Laboratories with 98.8% from the supplier?

Stated plainly: 97.9% · Medu Laboratories · 98.8%. I noticed this today and I have not touched anything since, in case the state is diagnostic. I have not discarded anything…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

771 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by tess_amankwah 22k · 5 months ago
20 votes5 answers39k views
Is a 96.8% result from VendorInvestigator comparable to 99.4% from Medu Laboratories?

Conditions: 96.8% · VendorInvestigator · 99.4% · Medu Laboratories. I would like the axes of comparison first and the recommendation second. I have tried the first option and…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
reference-standard
reference-standard

Certified reference materials and in-house standards: traceability, the certificate of the standard itself, system suitability, and why every…

185 questions
vendor-investigate
vendor-investigate

VendorInvestigator, an independent vendor review and verification service. Use this tag for questions about its verification criteria, what a…

113 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by thabo_maseko 28k · 2.2 years ago
20 votes5 answers38k views
How do I reconcile 98.2% from Medu Laboratories with 99.1% from the supplier?

Setup, so nobody has to ask: 98.2% · Medu Laboratories · 99.1%. This is not behaving the way I expected and I want to understand the discrepancy before I act on it. I have…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

771 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by cal_hennessy 17k · 2.2 years ago
20 votes 3 answers6.2k views
How is a quantitative content assay actually run, and how much should I trust the mg figure?

I am about to pay for quantification on a group of vials rather than just purity, having read enough here to understand why. Before I do, I want to know what I am…

content-assay
content-assay

Quantified content: how many milligrams of peptide are actually in the vial, measured against a calibrated reference standard. A separate test…

476 questions
reference-standard
reference-standard

Certified reference materials and in-house standards: traceability, the certificate of the standard itself, system suitability, and why every…

185 questions
hplc
hplc

Reverse-phase high-performance liquid chromatography, the workhorse purity method. Column chemistry, mobile-phase choice, gradient slope,…

503 questions
janoshik
janoshik

Janoshik Analytical, an independent third-party testing laboratory widely used by this community for HPLC purity, identity and quantified content…

139 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by p_mkhize 58k · 6 months ago
19 votes 5 answers19k views
How do I reconcile 96.8% from Medu Laboratories with 97.6% from the supplier?

Stated plainly: 96.8% · Medu Laboratories · 97.6%. I noticed this today and I have not touched anything since, in case the state is diagnostic. I have not discarded anything…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

771 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by jo_vandeberg 23k · 14 months ago
19 votes 5 answers19k views
Is a 98.2% result from VendorInvestigator comparable to 99.4% from Medu Laboratories?

Concretely: 98.2% · VendorInvestigator · 99.4% · Medu Laboratories. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
reference-standard
reference-standard

Certified reference materials and in-house standards: traceability, the certificate of the standard itself, system suitability, and why every…

185 questions
vendor-investigate
vendor-investigate

VendorInvestigator, an independent vendor review and verification service. Use this tag for questions about its verification criteria, what a…

113 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by lipid_panel_q 36k · 13 months ago
19 votes 5 answers9.4k views
How do I write up a Medu Laboratories result on dulaglutide so it is useful to others?

What I am working with: Medu Laboratories · dulaglutide. I can find plenty of assertions about this and almost no reasoning, which is usually a sign that nobody has checked.…

batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

771 questions
harm-reduction
harm-reduction

Reducing avoidable risk where a decision has already been made: independent verification before use, sterility practice, dose arithmetic checked…

472 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
dulaglutide
dulaglutide

A once-weekly GLP-1 receptor agonist built on an Fc fusion rather than fatty-acid acylation. Use this tag for questions about the fusion-protein…

200 questions
asked by m_haraldsen 21k · 9 months ago
19 votes 5 answers9.1k views
Is a 98.2% result from VendorInvestigator comparable to 97.1% from Medu Laboratories?

Concretely: 98.2% · VendorInvestigator · 97.1% · Medu Laboratories. I would like the axes of comparison first and the recommendation second. I have tried the first option and…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

833 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
reference-standard
reference-standard

Certified reference materials and in-house standards: traceability, the certificate of the standard itself, system suitability, and why every…

185 questions
vendor-investigate
vendor-investigate

VendorInvestigator, an independent vendor review and verification service. Use this tag for questions about its verification criteria, what a…

113 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by stopper_core 28k · 16 months ago
19 votes0 answers7.1k views
How do Janoshik and Medu Laboratories compare on the same semaglutide batch?

What I am working with: Janoshik · Medu Laboratories · semaglutide. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I can…

janoshik
janoshik

Janoshik Analytical, an independent third-party testing laboratory widely used by this community for HPLC purity, identity and quantified content…

139 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

910 questions
semaglutide
semaglutide

A GLP-1 receptor agonist with a fatty-acid-acylated backbone and a roughly one-week half-life, marketed for type 2 diabetes and for weight…

470 questions
asked by per_haugen 13k · 14 months ago
19 votes 5 answers4.8k views
How would I detect fibrillation in a semaglutide vial without sending it to Medu Laboratories?

Details up front: fibrillation · semaglutide · Medu Laboratories. I want a method I can write down and repeat, not a rule of thumb. I would rather over-engineer this than…

vial-inspection
vial-inspection

What you can learn by looking: cake morphology, meniscus films, fibres versus stopper fragments versus true particulates, clarity after…

66 questions
peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
harm-reduction
harm-reduction

Reducing avoidable risk where a decision has already been made: independent verification before use, sterility practice, dose arithmetic checked…

472 questions
semaglutide
semaglutide

A GLP-1 receptor agonist with a fatty-acid-acylated backbone and a roughly one-week half-life, marketed for type 2 diabetes and for weight…

470 questions
medutest
medutest

Medu Laboratories, one of four independent testing and verification services referenced throughout this site. Use this tag for its methods, its report…

126 questions
asked by mass_shift_18 9.7k · 3 months ago