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batch-testing

Page 35 of 38 · 910 questions tagged batch-testing.

910 questions · sorted by votes · page 35 of 38

5 votes 5 answers16k views
What has VendorInvestigate published on GL Biochem lots in the last year?

Stated plainly: VendorInvestigate · GL Biochem. I would like to know the limits of what can be inferred from this. What I am trying to avoid is over-reading a single…

vendor-investigate
vendor-investigate

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

113 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-comparison
vendor-comparison

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

388 questions
asked by drawn_and_capped 12k · 16 months ago
5 votes5 answers15k views
My survodutide vial sat at room temperature for twenty-one days — is testing worth it before use?

Conditions: survodutide · room temperature · twenty-one days. The failure mode I am trying to avoid is making this decision emotionally. I have twelve months in view…

cold-chain
cold-chain

Keeping material within a temperature window from manufacture to use: phase-change packs versus dry ice, thermal mass, transit-lane temperature…

578 questions
peptide-stability
peptide-stability

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

908 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
survodutide
survodutide

A GLP-1 and glucagon receptor dual agonist with a substantial published MASH dataset. Use this tag for its hepatic endpoints, its dose ladder, and…

225 questions
asked by k_szabo 27k · 21 months ago
5 votes 5 answers12k views
Would you re-test survodutide after twelve weeks at 2–8 °C, or accept the original certificate?

The case in front of me: survodutide · twelve weeks · 2–8 °C. I want to decide this in advance so that I am not deciding it under pressure later. Assume I will follow…

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
peptide-stability
peptide-stability

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

908 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
survodutide
survodutide

A GLP-1 and glucagon receptor dual agonist with a substantial published MASH dataset. Use this tag for its hepatic endpoints, its dose ladder, and…

225 questions
asked by tabular_nums 71k · 2.1 years ago
5 votes5 answers11k views
Is a sampling plan from WXT sufficient basis to skip independent testing?

For reference: sampling plan · WXT. This is a planning question. I know what my options are; I do not know how to weigh them. What I want is the minimum viable…

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
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
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
asked by yuki_morishita 10k · 12 months ago
5 votes 5 answers9.8k views
My orforglipron vial sat at 25 °C for ten days — is testing worth it before use?

Stated plainly: orforglipron · 25 °C · ten days. I would like to set this up properly once, rather than adjust it repeatedly. My budget is real but not tight, and my…

cold-chain
cold-chain

Keeping material within a temperature window from manufacture to use: phase-change packs versus dry ice, thermal mass, transit-lane temperature…

578 questions
peptide-stability
peptide-stability

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

908 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
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
asked by aine_mulcahy 28k · 22 months ago
5 votes5 answers9.7k views
What does a purity figure on a JEEP report change about how I read it?

The case in front of me: purity figure · JEEP. I would like help reading this properly rather than being told what conclusion to reach. I have the full report…

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
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-vetting
vendor-vetting

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

454 questions
asked by eighty_six_hours 20k · 6 months ago
5 votes 5 answers9.1k views
How do I reconcile 98.8% from Janoshik with 96.4% from the supplier?

Numbers first: 98.8% · Janoshik · 96.4%. Before I write this off, I want to check whether it is a known failure mode. I have the lot number, the certificate and the…

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
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 jonas_ekstrom 12k · 9 months ago
5 votes3 answers7.6k views
Is a 97.9% result from VendorInvestigate comparable to 97.1% from Janoshik?

Conditions: 97.9% · VendorInvestigate · 97.1% · Janoshik. 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

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

113 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 thermal_mass 13k · 22 months ago
5 votes 5 answers7.4k views
Is a 99.4% result from PeptideMeter comparable to 98.2% from Janoshik?

For reference: 99.4% · PeptideMeter · 98.2% · Janoshik. 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

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

107 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 dana_wexler 11k · 11 months ago
5 votes 5 answers6k views
How do I reconcile 97.6% from Janoshik with 95.2% from the supplier?

Numbers first: 97.6% · Janoshik · 95.2%. Before I write this off, I want to check whether it is a known failure mode. I have the lot number, the certificate and the…

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
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 area_percent 9.9k · 3 months ago
5 votes 2 answers5.9k views
My dulaglutide vial sat at minus 80 °C for ten days — is testing worth it before use?

Stated plainly: dulaglutide · minus 80 °C · ten days. I would like to set this up properly once, rather than adjust it repeatedly. My budget is real but not tight,…

cold-chain
cold-chain

Keeping material within a temperature window from manufacture to use: phase-change packs versus dry ice, thermal mass, transit-lane temperature…

578 questions
peptide-stability
peptide-stability

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

908 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
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 Dr_Aoife_Brennan 20k · 6 months ago
5 votes 3 answers5.6k views
How many vials from a QST lot should I send for a sterility test?

What I am working with: QST · a sterility test. Please show the division. I want to check my own against yours. I would like the general form as well as the specific…

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
cost-analysis
cost-analysis

Cost arithmetic done honestly: cost per milligram after dead-space loss, list versus net price, comparing a multi-dose vial to a fixed-dose pen,…

260 questions
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…

142 questions
asked by Dr_Fatima_Belkacem 18k · 7 months ago
5 votes 5 answers5.1k views
What does a chromatogram on an MKM report change about how I read it?

Conditions: chromatogram · MKM. I would like to know the limits of what can be inferred from this. What I am trying to avoid is over-reading a single result, which I…

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
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-vetting
vendor-vetting

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

454 questions
asked by h_villanueva 70k · 5 months ago
5 votes 5 answers5.1k views
Is QYB worth the price difference against Chinese Peptide Company on measured results?

Details up front: QYB · Chinese Peptide Company. I am trying to choose between two options that are usually discussed as though only one exists. I am not optimising…

vendor-comparison
vendor-comparison

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

388 questions
cost-analysis
cost-analysis

Cost arithmetic done honestly: cost per milligram after dead-space loss, list versus net price, comparing a multi-dose vial to a fixed-dose pen,…

260 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
asked by Dr_Aoife_Brennan 20k · 17 days ago
5 votes 5 answers4.9k views
Is QYB worth the price difference against Qingdao Saber Technology on measured results?

The case in front of me: QYB · Qingdao Saber Technology. The comparison I want does not seem to exist anywhere in a form I can evaluate. I have read the arguments for…

vendor-comparison
vendor-comparison

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

388 questions
cost-analysis
cost-analysis

Cost arithmetic done honestly: cost per milligram after dead-space loss, list versus net price, comparing a multi-dose vial to a fixed-dose pen,…

260 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
asked by mass_shift_18 9.7k · 12 months ago
5 votes4 answers4.6k views
How do I check that two BCH lots of a GLP-1 receptor agonist agree on content assay?

Stated plainly: BCH · a GLP-1 receptor agonist. I noticed this today and I have not touched anything since, in case the state is diagnostic. I have not discarded…

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
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
vendor-vetting
vendor-vetting

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

454 questions
asked by rania_haddad 13k · 5 months ago
5 votes5 answers4.3k views
Would you re-test oral semaglutide after ten weeks at 25 °C, or accept the original certificate?

The particulars: oral semaglutide · ten weeks · 25 °C. I would like to define my thresholds before I have a result, for obvious reasons. I want a plan with explicit…

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
peptide-stability
peptide-stability

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

908 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
oral-glp1
oral-glp1

Oral routes for GLP-1 receptor agonism: peptide formulations rescued by absorption enhancers such as SNAC, and true small molecules that need no…

219 questions
asked by cake_intact 17k · 3 months ago
5 votes 5 answers2.9k views
How many vials from an ERP lot should I send for peptide mapping?

For reference: ERP · peptide mapping. The units are where I keep going wrong, so please be explicit about them. I have sanity-checked the order of magnitude and it…

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
cost-analysis
cost-analysis

Cost arithmetic done honestly: cost per milligram after dead-space loss, list versus net price, comparing a multi-dose vial to a fixed-dose pen,…

260 questions
peptide-mapping
peptide-mapping

Enzymatic digestion followed by LC-MS/MS to confirm sequence rather than just mass. The method that catches a scrambled sequence or a D-amino-acid…

103 questions
asked by linnea_wahlberg 17k · 4 months ago
5 votes 5 answers2.8k views
Would you re-test tirzepatide after three weeks at room temperature, or accept the original certificate?

What I am working with: tirzepatide · three weeks · room temperature. I am at the decision point and I would rather think it through than improvise. I would rather…

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
peptide-stability
peptide-stability

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

908 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
tirzepatide
tirzepatide

A dual GIP and GLP-1 receptor agonist. Questions here cover the SURPASS and SURMOUNT programmes, the practical differences from a pure GLP-1…

370 questions
asked by nominal_ten 12k · 2 months ago
5 votes 5 answers2.2k views
Is JEEP worth the price difference against Shanghai ERP Biotechnology on measured results?

Details up front: JEEP · Shanghai ERP Biotechnology. I want to know what the trade-off actually is rather than which option is fashionable. I would rather have a…

vendor-comparison
vendor-comparison

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

388 questions
cost-analysis
cost-analysis

Cost arithmetic done honestly: cost per milligram after dead-space loss, list versus net price, comparing a multi-dose vial to a fixed-dose pen,…

260 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
asked by sample_id 17k · 35 days ago
5 votes0 answers1.9k views
My a GLP-1 receptor agonist vial sat at 2–8 °C for seven days — is testing worth it before use?

Details up front: a GLP-1 receptor agonist · 2–8 °C · seven days. This is a planning question. I know what my options are; I do not know how to weigh them. What I…

cold-chain
cold-chain

Keeping material within a temperature window from manufacture to use: phase-change packs versus dry ice, thermal mass, transit-lane temperature…

578 questions
peptide-stability
peptide-stability

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

908 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
asked by noor_alhassan 11k · 9 months ago
5 votes0 answers1.9k views
How many vials from an MKM lot should I send for an endotoxin test?

Concretely: MKM · an endotoxin test. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an online calculator…

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
cost-analysis
cost-analysis

Cost arithmetic done honestly: cost per milligram after dead-space loss, list versus net price, comparing a multi-dose vial to a fixed-dose pen,…

260 questions
endotoxin
endotoxin

Bacterial endotoxin: LAL and kinetic chromogenic methods, how an endotoxin limit is derived from a dose, why endotoxin survives autoclaving, and…

23 questions
asked by two_two_micron 9.3k · 7 months ago
5 votes 3 answers1.7k views
Would you re-test survodutide after four weeks at room temperature, or accept the original certificate?

What I have: survodutide · four weeks · room temperature. The failure mode I am trying to avoid is making this decision emotionally. I have twelve months in view and…

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
peptide-stability
peptide-stability

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

908 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
survodutide
survodutide

A GLP-1 and glucagon receptor dual agonist with a substantial published MASH dataset. Use this tag for its hepatic endpoints, its dose ladder, and…

225 questions
asked by mass_shift_18 9.7k · 4 months ago
5 votes0 answers1.4k views
How do Medutest and Janoshik compare on the same liraglutide batch?

Stated plainly: Medutest · Janoshik · liraglutide. I have used one of these for a while and I am considering switching, which requires a reason. What I care about is…

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

Medutest, 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
liraglutide
liraglutide

A once-daily GLP-1 receptor agonist and the compound that established the class. Still relevant for its shorter half-life, its paediatric and…

235 questions
asked by cal_hennessy 17k · 12 months ago