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john
2 m ago
Unexpected Peaks After Running a Solvent Blank

I was running a sequence of product samples and decided to inject a methanol blank in between. To my surprise, I saw unexpected peaks—some of which matched my analytes.

Gas Chromatography (GC) gc
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Avatar youhana Hosny 2 m ago

good info :)

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john
2 m ago
Retention Time Shifts Mid-Run

In a long GC run (about 30 samples), I noticed that retention times started shifting gradually. Early samples were fine, but later ones drifted.

Gas Chromatography (GC) gc
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Avatar youhana Hosny 2 m ago

good info :)

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Avatar youhana Hosny 2 m ago

:)

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