vialroom

#coa-reading 2026-05-06

Wednesday13 messages4 participantstimes are UTC
Highlights from this day
  • area_percent — update on the earlier thing is there a standard layout or does every lab do their own 18:18
  • void_volume — retention time shifts between runs are normal. relative retention time is the number to compare 18:20
  • void_volume — no lot number, no certificate. a document you cannot tie to the vial in your hand is decoration 20:56
AP
area_percentlab18:15

coming back after 21 months, has the pinned reading guide changed

same chromatogram

update on the earlier thing is there a standard layout or does every lab do their own

VV
void_volumelab18:20

retention time shifts between runs are normal. relative retention time is the number to compare

VV
void_volumelab18:57

single wavelength detection can miss a co-eluting impurity that does not absorb there

not evidence on its own

📉3
VV
void_volumelab19:20

no lot number on this certificate, does that make it worthless

BB
belfast_bac19:23

how do you verify a certificate is actually from the lab it says

VV
void_volumelab20:56

no lot number, no certificate. a document you cannot tie to the vial in your hand is decoration

check the lot

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