On the subject in the title: Submitting a sample: the process end to end Working notes rather than a conclusion.
Submitting a sample keeps being re-asked here and I think that is because the answer is conditional and the conditions never travel with it.
Attempting to write the conditional version down properly. Corrections welcome and expected — I would like this to end up as a maintained page rather than a fifth thread.
Building on post #2 rather than restating it.
My understanding of submitting a sample is a few years old and may have been superseded. If it has been, I would genuinely like to know rather than keep repeating it.
Repeat testing: if you want to verify the same lot a second time, testing with a different service strengthens the conclusion. Testing with the same service verifies reproducibility but uses the same method.
Noting that the question and the thing people usually mean by it are different.
Repeat determination on the same product line months apart is the measurement that speaks to consistency, and consistency is what most buyers actually want.
That is the honest state of it as of this week.
It does not extend to lots nobody has seen, it is not a recommendation, and it says nothing about anything other than what was measured.
Post #55 answers the question as asked. The question underneath it is different.
It does not extend to lots nobody has seen, it is not a recommendation, and it says nothing about anything other than what was measured.
Following, with nothing to contribute beyond having asked the same thing elsewhere.
On submitting a sample I would separate what is worth knowing from what is worth acting on. The first list is long and the second is short, and conflating them is how threads get heated.
On post #99 — agreed on the reasoning, with one qualification.
Repeat testing: if you want to verify the same lot a second time, testing with a different service strengthens the conclusion. Testing with the same service verifies reproducibility but uses the same method.
That has been true for the cases I have seen and I have not seen many.
Read the full topic (115 posts)
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About the Independent verification category
Janoshik, Medutest, PeptideMeter and VendorInvestigate results, how to submit a sample, and how to read what comes back. This post is a community wiki: any member at trust level 3 or above can edit it, and…
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+1 | 5 | 5.8k | 23h |
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Revisiting: Aggregate verification data across the directory, with caveats
Revisiting: Aggregate verification data across the directory, with caveats — setting out what I have, and where I think it stops being reliable. I have spent a fortnight trying to pin Aggregate verification…
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+22 | 26 | 23k | 17mo |
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Blind submission and why it changes minds
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+91 | 96 | 1.1k | 21mo |
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How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ
How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ I have a specific reason for asking rather than idle curiosity, and the context is below. A question about how a record should be read rather…
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+117 | 130 | 3.3k | 14mo |
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Turnaround times and what they mean for a decision — one year on
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+25 | 29 | 22k | 18mo |
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A comparison of home results against a laboratory result on the same vial — does this still hold?
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+2 | 6 | 15k | 11h |
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What a simple presence test is genuinely useful for — does this still hold?
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2 | 22k | 16mo | |
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Blind submission and why it changes minds
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+91 | 96 | 1.1k | 21mo |
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Choosing which test to pay for, given a fixed budget — does this still hold?
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+35 | 39 | 755 | 20mo |
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Blind submission and why it changes minds — the long version
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+98 | 113 | 18k | 2mo |