Where I part company with post #7, and it is a narrow parting.
Reconstitution behaviour is a legitimate home observation. A cake that will not dissolve, a solution that hazes, visible particulate — all are real information and all are free.
If anyone can point at the primary source I would be grateful.
Post #9 is the version of this I will quote in future. One addition.
Quantitation at home is the part that does not survive scrutiny. Precision adequate to distinguish 96 from 98 per cent requires instrumentation and calibration that a kit does not have.
I am describing what is, rather than arguing for what should be.
Where home testing is genuinely valuable is as a screen before spending on independent analysis, not as a substitute for it.
I had written a reply contradicting post #27 and deleted it. Here is what survived.
Why third-party testing is stronger: a home test run by the person who made the compound is a self-selected result. The test run by a neutral third party removes obvious sources of bias.
It reads as pedantry until the day it does not.
Coming back to post #31, because the follow-up matters more than the original answer.
Precision of home tests: most consumer-accessible devices are not precise to the level people want ("is this 99% pure or 97% pure"). They give a yes/no or a rough category, not a quantitative number.
This has been discussed before and I could not find the thread, so, again.
Research-use-only material is not certified for anything by anybody, and no home procedure changes that. What home checks buy you is early detection of the obvious problems.
Research-use-only material is not certified for anything by anybody, and no home procedure changes that. What home checks buy you is early detection of the obvious problems.
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