TY - JOUR
T1 - Barrier film protected, and mixed solvent optimized micro-scale membrane extraction of methyl carbamate pesticides
AU - Hylton, Kamilah
AU - Mitra, Somenath
PY - 2007/6/22
Y1 - 2007/6/22
N2 - Hollow fiber based microextraction has emerged as an effective alternative to conventional preconcentration techniques. The loss of the extractant solvent through the membrane has been an important issue, and dip-coating with a barrier film is a method for stabilizing the acceptor. Typically, only one solvent is used to serve as the extractant, which limits the range of compounds that can be analyzed simultaneously. Mixing solvents in varying proportions can increase the range of compounds enriched. This paper reports the optimization of the microextraction system by implementing a barrier film to reduce solvent loss, in conjunction with the use of mixed solvents to enrich a broader spectrum of analytes. A group of five carbamate pesticides were studied here. The detection limits were at ppb levels and the enrichment was as high as 1600 times depending upon the solvent. R2 and %RSD ranged from 0.9501 to 0.9991 and 1.90 and 9.53, respectively.
AB - Hollow fiber based microextraction has emerged as an effective alternative to conventional preconcentration techniques. The loss of the extractant solvent through the membrane has been an important issue, and dip-coating with a barrier film is a method for stabilizing the acceptor. Typically, only one solvent is used to serve as the extractant, which limits the range of compounds that can be analyzed simultaneously. Mixing solvents in varying proportions can increase the range of compounds enriched. This paper reports the optimization of the microextraction system by implementing a barrier film to reduce solvent loss, in conjunction with the use of mixed solvents to enrich a broader spectrum of analytes. A group of five carbamate pesticides were studied here. The detection limits were at ppb levels and the enrichment was as high as 1600 times depending upon the solvent. R2 and %RSD ranged from 0.9501 to 0.9991 and 1.90 and 9.53, respectively.
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U2 - 10.1016/j.chroma.2007.03.131
DO - 10.1016/j.chroma.2007.03.131
M3 - Article
C2 - 17448485
AN - SCOPUS:34249714811
SN - 0021-9673
VL - 1154
SP - 60
EP - 65
JO - Journal of Chromatography A
JF - Journal of Chromatography A
IS - 1-2
ER -