Afkhami Abbas, Norooz-Asl Rasoul
Faculty of Chemistry, Bu-Ali Sina University, Hamadan, Iran.
J Hazard Mater. 2009 Aug 15;167(1-3):752-5. doi: 10.1016/j.jhazmat.2009.01.039. Epub 2009 Jan 20.
A rapid, selective and sensitive cloud point extraction process using the nonionic surfactant, Triton X-114, to extract phosphorus in the form of orthophosphate from aqueous solutions was investigated. The method is based on the color reaction of orthophosphate with molybdate in acidic medium and in the presence of Sb(III) and ascorbic acid, then cloud point extraction of phosphomolybdenum blue in micellar medium. Effects of reaction and extraction parameters were studied and optimum parameters were established. The analytical characteristics of the method (e.g., limit of detection, linear range, relative standard deviation) were obtained. Linearity was obeyed in the range of 1.0-125 ng mL(-1) of P. The detection limit of the method was 0.5 ng mL(-1) of P. The interference effect of some common ions was also tested. The method was applied to the determination of orthophosphate in natural water samples.
研究了一种使用非离子表面活性剂Triton X-114从水溶液中快速、选择性且灵敏地萃取正磷酸盐形式磷的浊点萃取方法。该方法基于正磷酸盐在酸性介质中、在Sb(III)和抗坏血酸存在下与钼酸盐的显色反应，然后在胶束介质中对磷钼蓝进行浊点萃取。研究了反应和萃取参数的影响并确定了最佳参数。获得了该方法的分析特性（如检测限、线性范围、相对标准偏差）。在1.0 - 125 ng mL(-1)的P范围内符合线性关系。该方法的检测限为0.5 ng mL(-1)的P。还测试了一些常见离子的干扰效应。该方法应用于天然水样中正磷酸盐的测定。
