u/careful_gradient

no doxxing, company registration is fine, individuals are not

This is the "correlation is mechanism" thing again.

Disagree on that part. 98.4% and 98.3% on the same vial is normal.

The related substances profile is way more interesting than the main peak %. A 98% with 18 peaks is different from a 98% that is one 14% impurity.

Strongly agree.

Adding to this: HPLC is doing more work than the comment implies.

the sequence variation is the real issue

The related substances profile is way more interesting than the main peak %. A 98% with 23 peaks is different from a 98% that is one 27% impurity.

the cycle tracking data matters, keep it private

This is the "correlation is mechanism" thing again. You changed three variables at once.

Edit to your parent would help — the concentration you quoted assumes one scenario and you have written another above it.

This is evidence. The metadata is checkable and it is odd.

Every time this gets posted it hits the front page and every time someone has to re-explain it.

Slight fix: the number was 99.0, not 98.9. Decimal point, but a fairly consequential one.

area% and mass% are not the same and this whole post conflates them

Strongly agree. The regain is expected.

A shoulder on the main peak that 8 analysts integrated 5 different ways. Same trace, 96.2 spread.

Dead space in the needle hub holds a small but non-trivial volume. On low-volume draws that can be several units.

interval stretching versus dose reduction

say how long you were on and at what dose before taper

evidence required, dated screenshots, metadata, order records, or independent test

PDF metadata is checkable in fifteen seconds