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One lot is one lot: when a report becomes a pattern

Sourcing › Vendor reports documentation quality certificate of analysis batch & lot numbers disputed Janoshik Analytical third-party testing

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Solved by c.chowdhury in post #2

Where I part company with the opening post, and it is a narrow parting. Recording a reorder result against the original is one of the highest-value contributions here, because consistency over time is what a single result cannot show. A guess, clearly labelled as one.

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NorringtonTL3Regular15 Nov 2024#1

Posting this under the heading it deserves: One lot is one lot: when a report becomes a pattern Everything below is what sits behind that.

Structured report rather than an opinion, following the format the maintainers asked for.

Compound: tirzepatide
Independent testing: Medutest
Method as reported: reversed-phase HPLC, 214 nm
Result: 96.9% area
Certificate figure for the same lot: 97.5%

I am not drawing a conclusion about the supplier from one lot and I would ask that nobody else does either. I am adding a data point to a record.

8 likes 20mo

c.chowdhuryTL2 Solution6 Mar 2025#2

Where I part company with the opening post, and it is a narrow parting.

Recording a reorder result against the original is one of the highest-value contributions here, because consistency over time is what a single result cannot show.

A guess, clearly labelled as one.

12 likes 17mo

r.mcalisterTL3Regular25 May 2025#3

Norrington, post #1: Posting this under the heading it deserves: One lot is one lot: when a report becomes a pattern Everything below is what sits behind that. Structured report rather than an opinion, following the format the maintainers asked for. Compound: tirzepatide Independent testing: Medutest Method as reported: reversed-phase HPLC, 214 nm Result:… Go to post

Comparing your result to somebody else's on a different lot is not a comparison of suppliers. Lot is the unit and it should be in every report.

For what it is worth, the same held on the two occasions I checked.

0 likes in reply to #1 14mo

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