期刊
JOURNAL OF SEPARATION SCIENCE
卷 43, 期 20, 页码 3921-3930出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.202000635
关键词
acetamiprid; fluorescence; ion chromatography; neonicotinoids; online; postcolumn
资金
- Zhejiang Provincial Natural Science Foundation of China [LZ16B050001]
This study aims to introduce a simple, sensitive, and cost-effective method for the simultaneous determination of acetamiprid and its main metabolite 6-chloronicotinic acid in environmental samples by using a nonsuppressed ion chromatography hyphenated with an online postcolumn photoinduced fluorescence detection system. The fluorescence detector wavelengths lambda(ex)/lambda(em) = 257/382 nm was set for up to 6.0 min for acetamiprid, while lambda(ex)/lambda(em) = 231/370 nm programmed for 6-chloronicotinic acid for the rest of the analysis time. Both samples were treated by applying miniaturized quick, easy, cheap, effective, rugged, and safe method before the separation of analytes on an IonPac(R)AS11-HC column by pumping 40 mM NaOH having minuscule content of acetonitrile (5%, v/v) as an eluent. Both intrinsically nonfluorescent analytes were turned-on by online postcolumn photoinduced derivatization, avoiding the need for complex chemical derivatization or addition of a postcolumn extra pump. The developed method was appraised for the analysis of environmental samples, exhibiting excellent linearity (0.050-10 mu g/mL) with a correlation coefficient greater than 0.9993 for both analytes. Whereas, obtained limit of detection (0.025-0.0072 mu g/mL), recoveries (98.02-116.00%), and inter- and intraday precision (<= 3.02 %) were satisfactory for both compounds in environmental samples.
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