Department of Chemistry, University of KwaZulu Natal, PBag X01, Scottsville, Pietermaritzburg, 3209, South Africa.
Department of Chemistry, University of KwaZulu Natal, PBag X01, Scottsville, Pietermaritzburg, 3209, South Africa.
J Environ Manage. 2019 Nov 1;249:109415. doi: 10.1016/j.jenvman.2019.109415. Epub 2019 Aug 21.
The solid phase extraction method has been developed and applied for the simultaneous analysis of the five most commonly used triazine pesticides. The analysis was conducted using a liquid chromatography-photodiode array detector, which was first optimized to improve the limit of quantification and detection. The extraction parameters (conditioning solvent and sample volume) that affect the recovery of the analytes for solid phase extraction were optimized. The recoveries obtained were between 107 and 111%. The limit of detection ranged between 0.668 and 1.16 μg/L and the limit of quantification ranged between 2.01 and 3.54 μg/L. Good precision with a relative standard deviation of less than 8% in all compounds was achieved. The developed and validated method was then applied to river water, wastewater and sludge samples from around KwaZulu-Natal. The quantified concentrations ranged from 8.35 to 2820 μg/L, 2.41-48.7 μg/L and 3.20-65.0 μg/L in sludge, wastewater, and river water respectively.
已开发并应用固相萃取法同时分析五种最常用的三嗪类农药。采用液相色谱-光电二极管阵列检测器进行分析，首先对其进行了优化，以提高定量限和检测限。优化了固相萃取中影响分析物回收率的萃取参数（洗脱溶剂和样品体积）。获得的回收率在 107%至 111%之间。检测限在 0.668 至 1.16μg/L 之间，定量限在 2.01 至 3.54μg/L 之间。所有化合物的相对标准偏差均小于 8%，精密度良好。开发和验证的方法随后应用于夸祖鲁-纳塔尔省周围的河水、废水和污泥样品。在污泥、废水和河水中定量的浓度分别为 8.35 至 2820μg/L、2.41 至 48.7μg/L 和 3.20 至 65.0μg/L。
