中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
五氟苯甲醇 | (2,3,4,5,6-pentafluorophenyl)methanol | 440-60-8 | C7H3F5O | 198.092 |
α-溴-2,3,4,5,6-五氟甲基苯酸酯 | (bromomethyl)pentafluorobenzene | 1765-40-8 | C7H2BrF5 | 260.989 |
A highly selective, sensitive method for determination of carboxylic acids in water has been developed that is based on fluorine-selective gas chromatography (GC) detection of pentafluorobenzyl ester derivatives. The atmospheric-pressure helium microwave-induced plasma detector is well suited for fluorine-specific detection of these derivatives, which were well resolved by capillary GC and displayed a characteristic fragmentation behavior when examined by GC-mass selective detection. For demonstration purposes, a number of carboxylic acids, ranging from C1 to C20, were examined and found to be derivatized with yields greater than 90%, and a sample of creek water was examined for its carboxylic acid content.