Liquid-liquid Microextraction Coupled with High Performance Liquid Chromatography for Determination of Platinum

Liquid-liquid microextraction (LLME) coupled with high performance liquid chromatography (HPLC) for the analysis of platinum is described. The analyte were extracted from 10.0 mL aqueous sample into organic phase. The extraction time was 20 min. Factors such as pH in aqueous phase, extraction times, and stirring rate were optimised. The method was applied for determination of platinum in mixture samples. The linearity range was from 1.0 to 100 nM and the detection limits was 0.1 nM. Relative standard deviations (%, n = 5) was 0.44 to 0.81. All experiments were carried out at room temperature, 35 0.2 degrees C.