MINIATURIZED METHOD BASED ON MATRIX SOLID-PHASE DISPERSION FOR THE RAPID SCREENING OF 36 PESTICIDES IN AGRICULTURAL FOOD COMMODITIES

被引：3
|
作者：
Covaci, Adrian [1 ]
Mashiya, Jabulani G. [2 ]
Molope, Itumeleng [3 ]
Tshiame, Ishmael [4 ]
Molatlhegi, Ronny [3 ]
Ngobeni, Prince [3 ]
机构：
[1] Univ Antwerp, Toxicol Ctr, B-2610 Antwerp, Belgium
[2] Tshwane Univ Technol, Dept Anim Sci, Pretoria, South Africa
[3] Tshwane Univ Technol, Dept Chem, Rosslyn, South Africa
[4] Tshwane Univ Technol, Dept Crop Sci, Pretoria, South Africa
来源：
ANALYTICAL LETTERS | 2010年 / 43卷 / 7-8期
关键词：
Fruit; Matrix solid-phase dispersion; Miniaturized method; Pesticides; South Africa; Validation; Vegetables; MASS-SPECTROMETRY; FRESH FRUITS; EXTRACTION; RESIDUES; VEGETABLES; CLEANUP;
D O I：
10.1080/00032710903518807
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Matrix solid-phase dispersion and gas chromatography-mass spectrometry were used for the rapid screening of 36 pesticides in agricultural products. Homogenized sample (0.5 g), C-8-modified silica (0.5 g) and Na2SO4 (1 g) were mixed and transferred to a cartridge containing activated silica (0.5 g). Best recoveries (> 60%) were found using dichloromethane-ethyl acetate (4: 1) for elution. Analytical characteristics at spiking levels (10-100 mu g/kg) were calculated for each pesticide. Matrix effects were studied by comparing the slopes of the matrix-matched calibration curves. Fruit and vegetable samples from South Africa complied with EU and South African current regulation, except for cypermethrin in green beans.
引用
收藏
页码：1400 / 1410
页数：11
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