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[2026 update] Comparing documentation quality across the directory, tabulated

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

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Solved by m.nwosu in post #3

post #2 is right about the mechanism and I think understates the practical bit. Structured report format: compound, lot, independent testing service, method as reported, result, and the certificate figure for the same lot. One lot is one lot. It becomes a pattern at three or four, and it becomes a disputed record…

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j.vandermolenTL3Regular27 Jul 2025#1

On the subject in the title: Comparing documentation quality across the directory, tabulated Working notes rather than a conclusion.

I would like to talk about documentation quality as a signal, separately from product quality.

Across the certificates I have collected, the variation in what is disclosed is much larger than the variation in the purity figures. Some name the analytical procedure; some give a number and a signature.

My hypothesis is that disclosure correlates with process control, and I would like to know whether the people who audit paperwork for a living think that is naive.

7 likes 12mo

CSagredoTL3Regular6 Aug 2025#2

Blind submission is worth the effort: have someone else relabel the sample so neither you nor the laboratory knows which supplier it came from until the result is back. Blind results change minds; self-selected results do not.

11 likes 12mo

m.nwosuTL2 Moderator Solution13 Aug 2025#3

post #2 is right about the mechanism and I think understates the practical bit.

Structured report format: compound, lot, independent testing service, method as reported, result, and the certificate figure for the same lot. One lot is one lot. It becomes a pattern at three or four, and it becomes a disputed record when asked and not explained.

25 likes 11mo

o.abrahamsenTL3Regular19 Aug 2025#4

Temporal patterns: if results from a supplier were good two years ago but have deteriorated recently, that is information. If they have been consistent over years, that is also information.

0 likes 11mo

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