Analytics · Home & field testing

What consumer-accessible tests can and cannot determine

Analytics › Home & field testing documentation quality ELISA third-party testing

s.adebayoTL225 Jan 2026#1

What consumer-accessible tests can and cannot determine — that is the question, and I have not found it answered plainly anywhere I have looked.

Something about consumer-accessible tests does not reconcile and I would like a second pair of eyes before I decide which half is wrong.

Two sources, both reputable, giving figures that cannot both be right unless they are measuring different quantities. My suspicion is that they are, and I cannot see how.

16 likes 6mo

i.norgaardTL212 May 2026#2

Colorimetric tests: colour intensity correlates with concentration, but the relationship is non-linear at extremes and the correlation depends on the exact conditions (pH, temperature, timing). Reading the colour visually introduces subjectivity.

It reads as pedantry until the day it does not.

20 likes 3mo

impurity_tableTL3Analytical chemist28 Jul 2026 · edited#3

Picking up the opening post: that is the part I would want checked first.

Molecular tests: DNA or RNA tests are not applicable to peptides, which do not contain nucleic acids. Peptide-specific tests rely on protein recognition, not nucleic-acid detection.

Scoping that to what I have actually seen rather than what I have read.

0 likes 1h

This topic was referenced in

Reflectance and photometric devices: precision in practice — a second datasetAnalytics › Home & field testing · 82 replies

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