Simultaneous Determination of Mixed Heavy Metal Ions Cr (III) and Co (II) in Wastewater by Cloud Point Extraction Dual Wavelength Spectrophotometry

Using cloud point extraction technology and the principle of absorbance addition in multi-component system, mixed metal ions Cr (III) Co (II) industrial wastewater were enriched determined at pH 5.0 50℃, using ammonium pyrrolidine dithiocarbamate (APDC) as complexing agent Triton X-114 extractant. The results indicate that contents can be calculated a simultaneous equation system. detection limits for are 0.74 ng/ml 2.12 ng/ml, respectively. recovery rates 95.3% -104.0% 96.9% -103.5%, This method has characteristics high accuracy, good repeatability, fast speed, practical value.