An improved method for analyzing chlormequat and mepiquat in source waters by solid-phase extraction and liquid chromatography-mass spectrometry

文献类型： 外文期刊

第一作者： Yu, Zhiyong

作者： Yu, Zhiyong;Sun, Jingfang;Yang, Min;Jin, Fen;Zhang, Xi;Hu, Jianying

作者机构：

关键词： Liquid chromatography-mass spectrometry;Plant growth regulator;Source water;Chlormequat;Mepiquat

期刊名称：ANALYTICA CHIMICA ACTA （ 影响因子：6.558； 五年影响因子：6.228 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： A liquid chromatography-mass spectrometry (LC-MS) method for the identification and quantification of chlormequat (CQ) and mepiquat (MQ) in source waters with high sensitivity and specificity was established using WCX cartridges (150 mg/6 mL) for pre-concentration of the samples and using the CAPCELL PAK CR 1:4 (2.0 mm x 150 mm 5 μ m, SCX:C18 = 1:4) column containing strong cationic exchange resins and C18 for separation. The method could solve the problem for pre-concentrating ionic compounds from water samples and avoid the MS instrument fouling problem accompanied with the use of ion-pair reagents. After the optimization of analytical conditions, quantification was achieved in the positive elec-trospray ionization mode using selected ion monitoring. The samples were analyzed with multi-channel mode with quantification performed at 30 V cone voltage to ascertain the sensitivity and qualitative analysis performed at 60 V cone voltage simultaneously. The method detection limits (MDLs) of CQ and MQ. in source water were determined to be 14 and 22 ng L~(-1) . Finally, the method was used to quantify CQand MQ in several source waters, which gave a level ranging from below the quantitation limit to 28 ng L~(-1).

分类号： O65

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