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Preconcentration and determination of nicosulfuron, thifensulfuron-methyl and metsulfuron-methyl in water samples using carbon nanotubes packed cartridge in combination with high performance liquid chromatography

机译:碳纳米管填充柱结合高效液相色谱法对水样中烟嘧磺隆,噻吩磺隆甲基和甲磺隆甲基的富集和测定

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摘要

A new procedure was described with multiwalled carbon nanotubes as solid phase extraction packing material for the trace analysis of nicosulfuron, thifensulfuron and metsulfuron-methyl in water samples. The possible parameters influencing the enrichment were optimized and the optimal conditions were as followed: eluent, sample pH, flow rate and sample volume were acetonitrile containing 1% acetic acid, pH 3, 8 ML min(-1) and 500 mL, respectively. Under the optimal chromatographic separation and SPE conditions, the linear range, detection limit (S/N = 3) and precision (R.S.D., n = 6) were 0.04-10 ng mL(-1), 6.8 ng L-1 and 2.5% for nicosulfuron, 0.04-40 ng mL(-1), 11.2 ng L-1 and 5.4% for thifensulfuron, 0.02-20ng mL(-1), 5.9ng L-1, 2.1% for metsulfuron-methyl, respectively. The established method was well employed to determine nicosulfuron, thifensulfuron and metsulfuron-methyl in tap water, seawater, reservoir water and well water samples, and satisfactory results were obtained, the spiked recoveries in the range of 87.2-100.7%, 96.5-105.6% and 83.7-111.1% for them each, respectively. (c) 2005 Elsevier B.V. All rights reserved.
机译:描述了一种以多壁碳纳米管为固相萃取填料的新方法,用于痕量分析水中的烟嘧磺隆,噻吩磺隆和甲磺隆甲基。优化了可能影响富集的参数,并遵循了最佳条件:洗脱液,样品pH,流速和样品体积为分别含1%乙酸,pH 3、8 ML min(-1)和500 mL的乙腈。在最佳色谱分离和SPE条件下,线性范围,检测限(S / N = 3)和精密度(RSD,n = 6)为0.04-10 ng mL(-1),6.8 ng L-1和2.5%烟嘧磺隆的浓度分别为0.04-40 ng mL(-1),11.2 ng L-1和5.4%,噻吩磺隆为0.02-20ng mL(-1),5.9ng L-1,甲磺隆为2.1%。建立的方法可用于自来水,海水,储层水和井水样品中烟嘧磺隆,噻吩磺隆和甲磺隆的测定,结果令人满意,加标回收率分别为87.2-100.7%,96.5-105.6%。分别为83.7-111.1%。 (c)2005 Elsevier B.V.保留所有权利。

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