School of Chemistry and Environmental Sciences, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Xinxiang, P. R. China.
J Sep Sci. 2010 Jul;33(14):2184-90. doi: 10.1002/jssc.201000147.
This article described a new method for the sensitive determination of organophosphorus pesticides in water samples using SPE in combination with GC-flame photometric detection. In the procedure of method development, TiO(2) nanotubes were used as SPE adsorbents for the enrichment of organophosphorus pesticides from water samples. Several factors, such as eluent and its volume, sample pH, sample volume, sample flow rate, and concentration of humic acid, were optimized. Under the optimal conditions, the proposed method had good linear ranges as 0.1-40 microg/L for each of them, LOD of 0.11, 0.014, and 0.0025 microg/L, and LOQs of 0.37, 0.047, and 0.0083 microg/L for chlorpyrifos, phorate, and methyl parathion, respectively. The proposed method was validated with real environmental water samples and the spiked recoveries were over the range of 86.5-115.1%. All these results indicated that TiO(2) nanotubes, as a new SPE adsorbent, would be used widespread for the preconcentration and determination of environmental pollutants in the future.
本文描述了一种使用固相萃取（SPE）结合气相色谱-火焰光度检测法（GC-FPD）测定水样中有机磷农药的新方法。在方法开发过程中，采用 TiO(2)纳米管作为 SPE 吸附剂，从水样中富集有机磷农药。优化了几种因素，如洗脱液及其体积、样品 pH 值、样品体积、样品流速和腐殖酸浓度。在最佳条件下，该方法对每种农药均具有良好的线性范围（0.1-40μg/L），检测限（LOD）分别为 0.11、0.014 和 0.0025μg/L，定量限（LOQ）分别为 0.37、0.047 和 0.0083μg/L。该方法已用于实际环境水样的验证，加标回收率在 86.5-115.1%范围内。所有这些结果表明，TiO(2)纳米管作为一种新型 SPE 吸附剂，将在未来广泛用于环境污染物的预浓缩和测定。
