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Detection of time‐resolved photoionization currents from pesticide‐contaminated vegetation
Author(s) -
Kadosh Michal,
Gridin Vladimir V.,
Schechter Israel
Publication year - 2001
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1560/19qm-f8yj-un3f-khuq
Subject(s) - chemistry , pesticide , photoionization , environmental chemistry , contamination , vegetation (pathology) , ionization , extraction (chemistry) , chromatography , ecology , ion , medicine , organic chemistry , pathology , biology
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.