Shiraz University, Faculty of Sciences, Chemistry Department, Shiraz 71454, Iran.
Talanta. 2001 Apr 12;54(2):397-402. doi: 10.1016/s0039-9140(00)00680-9.
A sensitive and selective kinetic method is proposed for the determination of nanogram amounts of copper. The method is based on the catalytic effect of copper on the reduction of Ponceau S by sodium sulfide in an alkaline media. The rate of the reaction is monitored spectrophotometrically at 560 nm. The method allows determination of copper concentrations in the range 2-400 ng ml(-1) with a relative standard deviation of approximately 2%. The proposed method, which is highly selective to copper, has been applied satisfactory to its determination in real samples.
本文提出了一种测定痕量铜的灵敏、选择性动力学方法。该方法基于在碱性介质中，铜对亚硫酸钠还原丽春红 S 的催化作用。反应速率在 560nm 处通过分光光度法进行监测。该方法可在 2-400ng/ml 的浓度范围内测定铜，相对标准偏差约为 2%。该方法对铜具有高度选择性，已满意地应用于实际样品中铜的测定。
