[Discussion] the chromatogram advice in here is 2 years out of date
the chromatogram advice in here is 2 years out of date — a position I have arrived at slowly and would like tested. Numbers, in the order they matter: 2 years. Resolution between two peaks depends on retention, selectivity and efficiency. A shallower gradient buys retention and usually resolution, at the cost of peak…
Carryover from a previous high-concentration injection looks exactly like a small impurity. The blank injection is four minutes and it removes the ambiguity entirely.
Same view — reporting the gradient is what makes a result checkable rather than merely stated.
a blank injection between samples costs four minutes and settles most arguments
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area percent is relative to what the detector saw and nothing else
Carryover from a previous high-concentration injection looks exactly like a small impurity.
Adding one practical thing — run the blank. It answers this before anyone has to argue about it.