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. 2019 Dec 23;92(2):1826–1832. doi: 10.1021/acs.analchem.9b03670

Figure 4.

Figure 4

Overlay of Total Ion Current Chromatograms recorded in full scan of the ethylhydroxylamine- N-tert-butyldimethylsilyl-N-methyltrifluoroacetamide (MTBSTFA)-derivatized glyoxylate (in gray, solid line), MTBSTFA-derivatized glycolate and MTBSTFA-derivatized oxalate (in black) and a reagent blank (in gray, dashed line). Glycolate and oxalate did not react with ethylhydroxylamine, and their derivatization with MTBSTFA was not affected by the additional reaction needed for derivatization of glyoxylate. Other peaks present in this chromatogram were attributed to reagent peaks.