why do some certificates report to one decimal and some to two
#coa-reading 2026-02-22
Sunday13 messages5 participantstimes are UTC
Highlights from this day
- taper_tess — purity is what fraction of the contents is the target. assay is how many mg are actually there. different questions 21:41
- taper_tess — the font on this one changes halfway down, am i being paranoid 21:57
- taper_tess — why would a vial be 96.8 pure and still assay under label 21:58
- HPLC_Hank — a vial can be 99.4% pure and hold 8.1mg of a 10mg label. both numbers are true and only one of them is the one you care about 22:30
looks re-dated
👍3👀6
purity is what fraction of the contents is the target. assay is how many mg are actually there. different questions
tfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance
the font on this one changes halfway down, am i being paranoid
🧪5
why would a vial be 96.8 pure and still assay under label
📉2📈16🧪1
test it yourself
coming back after 20 months, has the pinned reading guide changed
not detected means nothing
a vial can be 99.4% pure and hold 8.1mg of a 10mg label. both numbers are true and only one of them is the one you care about
🙏3👍1⚠️14
good certificate actually
not evidence on its own
gross mass on a jewellery scale plus the water content is enough to catch most underfills