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- W2022235550 abstract "A flame ionization detector (FID) combined with capillary gas chromatography (GC/FID) and gas chromatography/mass spectrometry (GC/MS) has been used to identify multifunctional carbonyls in wet precipitation samples. The carbonyl groups were first derivatized to O-benzylhydroxyloxime (BH oxime) by using O-benzylhydroxylamine. The BH oxime derivatives were then treated with N,O-bis(trimethylsilyl)acetamide for the hydroxyl group to derive their TMS ethers. The BH oxime/TMS derivatives were measured using GC/FID as well as GC/MS on positive EI and CI (isobutane was used as CI gas) modes. Three groups of carbonyl compounds (monoaldehydes, dicarbonyls, hydroxycarbonyls) were identified in the samples by using this method. We have identified, for the first time, a group of α- and β-hydroxycarbonyls, glycolaldehyde, hydroxyacetone, and 4-hydroxy-2-butanone, in wet precipitation samples. Concentrations of hydroxycarbonyls ranged from 0.9 to 53.8 μg/L in the precipitation samples. Their concentration level is similar to that of low molecular weight dicarboxylic acids, which have been reported as major water-soluble organic compounds in rain." @default.
- W2022235550 created "2016-06-24" @default.
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- W2022235550 date "2000-08-31" @default.
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- W2022235550 title "Determination of α- and β-Hydroxycarbonyls and Dicarbonyls in Snow and Rain Samples by GC/FID and GC/MS Employing Benzyl Hydroxyl Oxime Derivatization" @default.
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- W2022235550 doi "https://doi.org/10.1021/ac000267g" @default.
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