期刊
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
卷 411, 期 2, 页码 315-327出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-018-1482-z
关键词
Dispersive solid-liquid microextraction; In situ acid-base effervescent reaction; Solidification of a floating organic droplet; Neonicotinoid insecticides and metabolites; Rice
资金
- National Natural Science Foundation of China [41807490]
- Natural Science Research Project of Higher Education of Anhui [KJ2018A0128]
- University Youth Science Foundation of Anhui Agricultural University [2017zd04]
A sensitive and rapid method named dispersive solid-liquid microextraction combining in situ acid-base reaction-based effervescence and solidification of a floating organic droplet was developed for the simultaneous determination of eight neonicotinoid insecticides and two metabolites in rice by ultra-performance liquid chromatography-tandem mass spectrometry. The samples were extracted with sodium citrate monobasic-modified acetonitrile by vortexing and purified by primary secondary amine, and then a mixture of 1-undecanol and sodium carbonate aqueous solution was rapidly injected. An acid-base reaction and carbon dioxide bubbles were generated in situ, which promoted the dispersion of 1-undecanol droplets and subsequent transfer of the analytes from the acidified acetonitrile extract to 1-undecanol. The 1-undecanol phase was easily retrieved by centrifugation and solidification in an ice bath. This novel dispersive solid-liquid microextraction fully utilized the advantages of the effervescent reaction and floating droplet solidification, which was carried out in a tube and did not require stepwise analysis for a solid matrix. Under the optimized conditions, the average recoveries of the analytes ranged from 77.8 to 97.1% with relative standard deviations less than 7.3. Thelimits of detection varied between 0.01 and 0.1gkg(-1), and enrichment factors were 42-55. The proposed method provides a quantitative, sensitive, and convenient analytical tool applicable for routine monitoring of neonicotinoids in rice.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据