Abstract
QuEChERS is a simple and efficient extraction method, widely used in the pesticide of residue detection. The purpose of this paper was to compare the extraction methods of pesticides between the improved QuEChERS method and the GB/T 24691—2009 (fruit and vegetable detergent). The extraction of pesticide residue from citrus samples were detected by HPLC. The results showed that when the chlorpyrifos, imidacloprid and propoxur were detected by the improved QuEChERS method, the peak time was about 5.1, 3.8, 11.5 min, respectively. When the spiked blank levels were 0.8～80, 0.5～40, 0.8～80 μg/mL, the detection limits were 0.89, 0.55, and 0.39 μg/mL. While the spiked blank levels respectively were in 1～20, 1～20, 5～30 μg/mL, the recovery rate was 68%～109%, 94%～108%, 109%～125% and the relative standard deviation was 2.48%～5.03%, 7.79%～10.92%, 2.32%～6.77% respectively. When the fruit and vegetable detergent extracted from GB/T 24691—2009, the peak time of chlorpyrifos, imidacloprid and propoxur was basically the same as the modified QuEChERS method. Moreover, when the same spiked blank level was applied to the improved QuEChERS method, the detection limits were 0.80, 0.78, and 0.54 μg/mL, respectively, The recoveries were 107%～195%, 25%～87% and 53%～93%, and the relative standard deviations were 5.61%～7.73%, 6.89%～9.42% and 5.44%～10.45%, respectively. Thus, it indicated that the improved QuEChERS-HPLC was better than GB/T 24691—2009 (fruit and vegetable detergent).
Publication Date
6-28-2017
First Page
68
Last Page
72
DOI
10.13652/j.issn.1003-5788.2017.06.014
Recommended Citation
Zhigao, SUN; Ran, SHENG; Jingmei, HAO; Yong, LONG; Fengsheng, YU; and Ming, FANG
(2017)
"Detected chlorpyrifos, imidacloprid, and propoxur residues in citrus by QuEChERS-high performance liquid chromatography method,"
Food and Machinery: Vol. 33:
Iss.
6, Article 14.
DOI: 10.13652/j.issn.1003-5788.2017.06.014
Available at:
https://www.ifoodmm.cn/journal/vol33/iss6/14
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