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Tags · Sourcing

VendorInvestigate

Independent vendor investigation and verification service.

18 topics 5 solved Group: Sourcing

Related in this group: certificate of analysis · batch & lot numbers · Janoshik Analytical · Medutest · PeptideMeter · third-party testing · blind sampling · documentation quality · underdosing · mislabelling · customs · shipping

18 topics

Topic	Participants	Replies	Views	Activity
Chain of custody for a sample you posted yourself Sourcing › Independent verification PeptideMeter third-party testing Janoshik Analytical blind sampling Chain of custody for a sample you posted yourself Writing it up because I had to work it out twice and would rather nobody else did. A logistics question, since the answers here are usually better than…		2	7.3k	5h
Chain of custody for a sample you posted yourself — one year on Sourcing › Independent verification VendorInvestigate Janoshik Analytical blind sampling third-party testing Posting this under the heading it deserves: Chain of custody for a sample you posted yourself — one year on Everything below is what sits behind that. Structured report rather than an opinion, following the…	+28	32	50k	15h
[2026 update] Interpreting a result that disagrees with the supplier's certificate Sourcing › Independent verification Medutest VendorInvestigate blind sampling third-party testing Solved On the subject in the title: Interpreting a result that disagrees with the supplier's certificate Working notes rather than a conclusion. Structured report rather than an opinion, following the format the…	+121	128	51k	17h
Submitting a sample: the process end to end Sourcing › Independent verification blind sampling PeptideMeter VendorInvestigate third-party testing On the subject in the title: Submitting a sample: the process end to end Working notes rather than a conclusion. I would like to talk about documentation quality as a signal, separately from product quality.…	+99	114	29k	21h
How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ — does this still hold? Sourcing › Independent verification PeptideMeter VendorInvestigate third-party testing Janoshik Analytical Asking directly, because I could not find a straight answer: How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ — does this still hold? Structured report rather than an opinion, following the…	+24	28	8k	1mo
How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ — a second dataset Sourcing › Independent verification Janoshik Analytical blind sampling PeptideMeter VendorInvestigate Solved How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ — a second dataset I have a specific reason for asking rather than idle curiosity, and the context is below. A logistics question, since the…	+42	46	46k	2mo
Turnaround times and what they mean for a decision Sourcing › Independent verification PeptideMeter Medutest Janoshik Analytical VendorInvestigate Turnaround times and what they mean for a decision Writing it up because I had to work it out twice and would rather nobody else did. A logistics question, since the answers here are usually better than…		4	29k	3mo
Choosing which test to pay for, given a fixed budget Sourcing › Independent verification third-party testing VendorInvestigate Medutest Janoshik Analytical On the subject in the title: Choosing which test to pay for, given a fixed budget Working notes rather than a conclusion. I would like to talk about documentation quality as a signal, separately from product…	+60	70	49k	3mo
What a documentation review can and cannot tell you — a second dataset Sourcing › Independent verification Janoshik Analytical VendorInvestigate blind sampling third-party testing The question in the title: What a documentation review can and cannot tell you — a second dataset I will give what I have already checked below so nobody repeats it. I would like to talk about documentation…		4	170	4mo
What a purity-only report leaves out Sourcing › Independent verification Medutest VendorInvestigate third-party testing PeptideMeter Solved What a purity-only report leaves out — that is the question, and I have not found it answered plainly anywhere I have looked. Structured report rather than an opinion, following the format the maintainers…	+92	105	4k	8mo
Publishing an inconvenient result: a case study Sourcing › Independent verification Medutest VendorInvestigate third-party testing Janoshik Analytical Wiki On the subject in the title: Publishing an inconvenient result: a case study Working notes rather than a conclusion. Structured report rather than an opinion, following the format the maintainers asked for.…	+59	70	992	11mo
What a documentation review can and cannot tell you Sourcing › Independent verification Medutest VendorInvestigate Janoshik Analytical blind sampling Solved Wiki What a documentation review can and cannot tell you — that is the question, and I have not found it answered plainly anywhere I have looked. I would like to talk about documentation quality as a signal,…	+79	83	950	11mo
How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ Sourcing › Independent verification blind sampling PeptideMeter Medutest third-party testing How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ I have a specific reason for asking rather than idle curiosity, and the context is below. Structured report rather than an opinion, following…	+117	130	3.3k	14mo
Revisiting: Aggregate verification data across the directory, with caveats Sourcing › Independent verification PeptideMeter third-party testing blind sampling Medutest Closed Revisiting: Aggregate verification data across the directory, with caveats — setting out what I have, and where I think it stops being reliable. I would like to talk about documentation quality as a signal,…	+22	26	23k	17mo
Turnaround times and what they mean for a decision — one year on Sourcing › Independent verification Medutest PeptideMeter VendorInvestigate third-party testing On the subject in the title: Turnaround times and what they mean for a decision — one year on Working notes rather than a conclusion. Structured report rather than an opinion, following the format the…	+25	29	22k	18mo
Choosing which test to pay for, given a fixed budget — does this still hold? Sourcing › Independent verification PeptideMeter blind sampling Janoshik Analytical VendorInvestigate Choosing which test to pay for, given a fixed budget — does this still hold? I have a specific reason for asking rather than idle curiosity, and the context is below. I would like to talk about documentation…	+35	39	755	20mo
Blind submission and why it changes minds Sourcing › Independent verification Janoshik Analytical VendorInvestigate PeptideMeter Solved Blind submission and why it changes minds — setting out what I have, and where I think it stops being reliable. Structured report rather than an opinion, following the format the maintainers asked for.…	+91	96	1.1k	21mo
Splitting a vial for two laboratories: how to do it without ruining both — what changed since Sourcing › Independent verification VendorInvestigate third-party testing Medutest blind sampling Closed Posting this under the heading it deserves: Splitting a vial for two laboratories: how to do it without ruining both — what changed since Everything below is what sits behind that. A logistics question, since…	+107	115	5.2k	22mo

Sponsored Janoshik Analytical — independent third-party testingHPLC purity and mass-spectrometric identity on submitted samples, reported with the method stated. The laboratory most often cited in this community’s verification records.Independent testing → Sponsored GL Biochem (Shanghai) Ltd. — synthesis, directFounded 1998. ISO 9001 and cGMP certified, over 1,500 staff and 200-plus patents. Custom peptide synthesis and amino acid derivatives, with a batch certificate on every order.Custom synthesis →