Determination of the insecticide imidacloprid in water and soil using high-performance liquid chromatography

被引:123
作者
Baskaran, S
Kookana, RS
Naidu, R
机构
[1] UNIV ADELAIDE,DEPT SOIL SCI,GLEN OSMOND,SA 5064,AUSTRALIA
[2] CSIRO,DIV SOILS,GLEN OSMOND,SA 5064,AUSTRALIA
关键词
water analysis; soil; environmental analysis; pesticides; imidacloprid;
D O I
10.1016/S0021-9673(97)00652-3
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
We describe an analytical technique for measuring residues of imidacloprid, a relatively new and highly active insecticide, in water and soil using high-performance liquid chromatography (HPLC). All analyses were performed on reversed-phase HPLC with UV detection at 270 nm using a mobile phase of acetonitrile-water (20:80, v/v). Fortified water samples were extracted with either solid-phase extraction (SPE) or liquid-liquid extraction methods. A detection limit of 0.5 mu g/l was achieved using the SPE method. The imidacloprid residues in soils were extracted with acetonitrile-water (80:20, v/v), and the extract was then evaporated using a rotary evaporator. The concentrated extract was redissolved in 1 ml of acetonitrile-water (20:80, v/v) prior to analysis by reversed-phase HPLC. A detection limit of 5 mu g/kg was obtained by this method which is suitable for analysis of environmental samples. Accuracy and precision at 10 and 25 mu g/kg soil samples were 85+/-6% and 82+/-4%, respectively. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:271 / 275
页数:5
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