Tags · Sourcing
batch & lot numbers
The identifier that makes any of this traceable.
Related in this group: certificate of analysis · Janoshik Analytical · Medutest · PeptideMeter · VendorInvestigate · third-party testing · blind sampling · documentation quality · underdosing · mislabelling · customs · shipping
51 topics · page 2 of 2
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A checklist for reading a certificate in under two minutes — does this still hold?
A checklist for reading a certificate in under two minutes — does this still hold? — that is the question, and I have not found it answered plainly anywhere I have looked. I would like to understand what this…
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+49 | 55 | 15k | 9mo |
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When a tidy document is a signal and when it is decoration
When a tidy document is a signal and when it is decoration I have a specific reason for asking rather than idle curiosity, and the context is below. A documentation question rather than an analytical one. I…
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+6 | 10 | 20k | 10mo |
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[2026 update] A certificate with no method stated: what can you conclude?
A certificate with no method stated: what can you conclude? — that is the question, and I have not found it answered plainly anywhere I have looked. I would like to understand what this number means before I…
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2 | 82 | 11mo | |
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[2026 update] Comparing documentation quality across the directory, tabulated
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…
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3 | 18k | 11mo | |
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Revisiting: Filing a first vendor report: a worked example
On the subject in the title: Revisiting: Filing a first vendor report: a worked example Working notes rather than a conclusion. Structured report rather than an opinion, following the format the maintainers…
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2 | 60k | 11mo | |
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A field-by-field walk through a certificate of analysis
Posting this under the heading it deserves: A field-by-field walk through a certificate of analysis Everything below is what sits behind that. A documentation question rather than an analytical one. I have a…
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+136 | 147 | 1.8k | 12mo |
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One lot is one lot: when a report becomes a pattern
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…
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2 | 19k | 14mo | |
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Water content on a certificate and why it changes the arithmetic
Water content on a certificate and why it changes the arithmetic — setting out what I have, and where I think it stops being reliable. A documentation question rather than an analytical one. I have a…
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+19 | 23 | 24k | 14mo |
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Filing a first vendor report: a worked example
Filing a first vendor report: a worked example 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 anywhere…
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+1 | 5 | 12k | 15mo |
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A certificate with no method stated: what can you conclude?
A certificate with no method stated: what can you conclude? I have a specific reason for asking rather than idle curiosity, and the context is below. I would like to understand what this number means before I…
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+49 | 57 | 1.2k | 16mo |
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Documenting a supplier's response to a discrepancy — does this still hold?
Documenting a supplier's response to a discrepancy — does this still hold? I have a specific reason for asking rather than idle curiosity, and the context is below. Structured report rather than an opinion,…
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+47 | 52 | 58k | 16mo |
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Counter-ion form: the field almost nobody reports — one year on
On the subject in the title: Counter-ion form: the field almost nobody reports — one year on Working notes rather than a conclusion. A documentation question rather than an analytical one. I have a…
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+121 | 139 | 31k | 16mo |
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One lot is one lot: when a report becomes a pattern — the long version
One lot is one lot: when a report becomes a pattern — the long version — setting out what I have, and where I think it stops being reliable. Structured report rather than an opinion, following the format the…
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+137 | 152 | 46k | 16mo |
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Specification in the result column: why that is a meaningful error — the long version
Specification in the result column: why that is a meaningful error — the long version Writing it up because I had to work it out twice and would rather nobody else did. Posting the method first, because I…
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+14 | 18 | 12k | 17mo |
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Why our vendor pages link the storefront and mark it sponsored
Why our vendor pages link the storefront and mark it sponsored — that is the question, and I have not found it answered plainly anywhere I have looked. A logistics question, since the answers here are usually…
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+17 | 21 | 335 | 18mo |
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Second pass at: Certificates issued by the seller versus by a laboratory
Second pass at: Certificates issued by the seller versus by a laboratory — setting out what I have, and where I think it stops being reliable. A documentation question rather than an analytical one. I have a…
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+81 | 92 | 20k | 18mo |
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Reporting a good result: why nobody bothers and why they should — one year on
Posting this under the heading it deserves: Reporting a good result: why nobody bothers and why they should — one year on Everything below is what sits behind that. Structured report rather than an opinion,…
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+19 | 27 | 4.7k | 18mo |
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About the Vendor reports category
Structured reports on named suppliers. Batch, date, method and document, or it stays in the unverified column. This post is a community wiki: any member at trust level 3 or above can edit it, and every edit…
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4 | 65k | 18mo | |
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Second pass at: A field-by-field walk through a certificate of analysis
Second pass at: A field-by-field walk through a certificate of analysis Writing it up because I had to work it out twice and would rather nobody else did. A documentation question rather than an analytical…
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+149 | 164 | 36k | 19mo |
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Reporting a discrepancy without making an allegation
On the subject in the title: Reporting a discrepancy without making an allegation Working notes rather than a conclusion. Structured report rather than an opinion, following the format the maintainers asked…
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+79 | 89 | 1k | 22mo |
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Coming back to: Purity assay versus content assay: two different numbers
Purity assay versus content assay: two different numbers — setting out what I have, and where I think it stops being reliable. I would like to understand what this number means before I repeat it anywhere. A…
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+71 | 77 | 31k | 23mo |