Detection of time-resolved photoionization currents from pesticide-contaminated vegetation

被引：8

作者：

Kadosh, M ^{[1
]}

Gridin, VV ^{[1
]}

Schechter, I ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Dept Chem, IL-32000 Haifa, Israel

来源：

ISRAEL JOURNAL OF CHEMISTRY | 2001年 / 41卷 / 02期

关键词：

D O I：

10.1560/19QM-F8YJ-UN3F-KHUQ

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Multiphoton-ionization fast-conductance (MPI-FC) was directly applied for detection of photoionization currents originated from pesticide traces irradiated by UV-laser. The principal methodology required for direct screening of pesticide traces deposited on various vegetational specimens was addressed. This approach was exemplified with 1,2,3,4,5,6-hexachlorocyclohexane and 3-amino-1,2,4-triazole, which are frequently found in agriculture-related industries. The range of pesticide concentrations covered was from 0.001 ng/mL to 1 mg/mL, and all measurements were carried out under ambient conditions. Our target vegetation substrates were sampled from the outdoors: grass, plant, and/or tree leaves. Neither material purification nor laborious extraction routines were utilized; thus employing MPI-FC for in situ/on-line monitoring of pesticide-contaminated vegetation is feasible.

引用

页码：99 / 104

页数：6