▲ 16 r/CHROMATOGRAPHY
Interday standard curves have wildly different response factors. What gives?
As the title suggests, these are the same standards ran 2 days apart on a GC/MS Agilent 7890 gc connected to a 5975C MS. DB5ms column, brand new septum and liner. I get good linearity, just not good repeatability.
EDIT: This trend shows the response factor growing over time, previous studies have shown it also shrinks. Slope increases over time then decreases over time repeating.
u/Zapp1982 — 6 days ago