PeptideStack
5.2kquestions
20kanswers
220users

coa

Page 32 of 32 · 749 questions tagged coa.

NewestActiveVotesUnanswered

749 questions · sorted by votes · page 32 of 32

2 votes0 answers581 views
Would you re-test a GLP-1 receptor agonist after six weeks at room temperature, or accept the original certificate?

Details up front: a GLP-1 receptor agonist · six weeks · room temperature. This is a planning question. I know what my options are; I do not know how to weigh them.…

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…

865 questionspeptide-stability
peptide-stability

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

832 questionscoa
coa

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

749 questionsasked by eighty_six_hours 16k · 6 months ago
1 vote3 answers5k views
How do I reconcile 97.6% from Medutest with 95.2% from the supplier?

Setup, so nobody has to ask: 97.6% · Medutest · 95.2%. I noticed this today and I have not touched anything since, in case the state is diagnostic. I have 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…

788 questionsbatch-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…

865 questionscoa
coa

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

749 questionsasked by sasha_ferreira 15k · 6 months ago
1 vote5 answers2.5k views
How do I interpret a sterility result with no sampling plan attached?

My setup is a refrigerator with a logger and a small work area I wipe down, nothing more. I have read the primary source rather than the summary, which has left me…

sterility
sterility

Sterility as a test result rather than an adjective. Covers what a sterility test actually measures, why "sterile filtered" on a document is close…

122 questionsbatch-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…

865 questionscoa
coa

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

749 questionsasked by swirl_dont_shake 19k · 10 days ago
1 vote3 answers1.7k views
How does CPC compare to Guangzhou JEEP Biotechnology on documentation quality?

The case in front of me: CPC · Guangzhou JEEP Biotechnology. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to…

vendor-comparison
vendor-comparison

Side-by-side comparison of suppliers on measurable axes - independently confirmed purity and content, lead time, cold-chain handling,…

351 questionscoa
coa

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

749 questionsvendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questionsasked by ivo_paunovic 15k · 3 months ago
1 vote0 answers175 views
How does CPC compare to Zhuhai Kerui Biotechnology on documentation quality?

Conditions: CPC · Zhuhai Kerui Biotechnology. I would like the axes of comparison first and the recommendation second. I have tried the first option and it works; the…

vendor-comparison
vendor-comparison

Side-by-side comparison of suppliers on measurable axes - independently confirmed purity and content, lead time, cold-chain handling,…

351 questionscoa
coa

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

749 questionsvendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questionsasked by s_kalniete 47k · 28 days ago