A WXT certificate is laid out the way a laboratory would expect, and I want to read one line by line here because the format is unfamiliar if you have only seen consumer-facing documents.
Lot code, method, gradient, column, wavelength, then the result with its peak table. You can reconstruct what was done from the page, which is the property that makes a document evidence rather than an assertion.
My own independent result came back three tenths below the published one and I nearly panicked, until somebody in this circle explained why two labs can honestly differ by that much.
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