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c/vendorvetting·submitted 7 months ago by u/zeynep_duarte

someone explain vendor to me like I have not read a paper in years

Needs Sourcebranch of 8 comments

someone explain vendor to me like I have not read a paper in years. Searched first, found three threads that contradict each other, hence the post. A certificate with a purity figure and no method line is not falsifiable. You cannot reproduce it, you cannot check it, and it tells you nothing about how the number was…

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8 comments, started 7 months ago
u/ruben_brandt114 points·7 months ago

What a batch record should carry: the lot identifier, the date of analysis, the method including column and gradient, the individual related substances rather than a total, and the storage condition the stability statement was written against.

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u/arne_nyberg63 points·7 months ago

What a batch record should carry: the lot identifier, the date of analysis, the method including column and gradient, the individual related substance

Adding the practical version: ask for lead time, minimum quantity and the batch record in the same message. Three answers, one email.

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u/batch_number_bertievetting28 points·7 months ago

Lead time and minimum quantity are the two facts people forget to ask for and then argue about later. Both are answerable in one email before you commit.

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u/kofi_ferreira21 points·7 months ago

Minimum order and lead time — did they quote both up front?

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[removed]16 points·7 months ago

[removed by moderator]

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u/zeynep_duarteOP43 points·7 months ago

What did they say when you asked for the method line?

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u/ipamorelin_i26 points·7 months ago

three independent results beat thirty forum posts

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u/nz_unfunded14 points·7 months ago

lead time quoted at checkout is the number to hold them to

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About c/vendorvetting

The community due-diligence desk. Vendor experiences, independent third-party test results, shipping and reship records, and the boring paperwork that separates a supplier from a story. Every substantive claim is expected to carry a receipt: an order id, a dated screenshot, or a test report from Janoshik, Medutest, PeptideMeter or VendorInvestigate.

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