Determination of Cd(II) in Water Samples by Summable Spectrophotometry of Positive-Negative Peaks after Cloud Point Extraction

Cadmium has been determined by summable spectrophotometry of positive-negative peaks with cadion and Triton X-114 after cloud point preconcentration. Influence factors on cloud point extraction, color reaction and absorbance were investigated by studying the summation absorbance of color compounds at 480 nm and 570 nm. The sensitivity and absorbance of this method are at least five times higher when compared with that of usual cadion spectrophotometry due to the summation of positive and negative peak. The proposed method is sensitive, simple, accurate and environmentally-friendly in the determination of cadmium in environment water.