the retyped ones give themselves away on alignment

mixed fonts and inconsistent kerning in one document is worth a second look, counterion changes the arithmetic

the certificate from AMB is the one i use to teach this because it actually has a populated impurity table

batch level is fine for a batch level question. if you are testing one vial you want the lot, lot specific not batch

small thing on this cert the impurity table is where the information is. the headline purity is the least interesting number on the page, that is how i read it anyway

thats a tell

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

small thing on this cert the teaching example we use is the one with the populated impurities table and the dated signature

a chromatogram that does not match the table underneath it is the most common tell i see

ill take your word, the table not the headline

sloppy not sinister