分光光度法快速测定磷石膏的溶解度

磷石膏主要成分为二水硫酸钙,硫酸钙溶解后溶液中含有大量的硫酸根,通过测定硫酸根的含量,可以计算出溶液中磷石膏的含量,进而求出磷石膏对应的溶解度。用铬酸钡分光光度法测定磷石膏的溶解度,在420nm波长处,硫酸钙为0～0.50mg/mL时与铬酸根吸光度呈线性关系。通过与传统的分析方法对比,可以验证实验结果的可靠性。该方法简单、快速、可行性强,可用于测定磷石膏的溶解度,可以满足测定要求。

Spectrophotometric Method for Measuring Solubility of Phosphorus Gypsum

The main ingredient of phosphorus gypsum was dehydrate calcium sulphate,the calcium sulphate contains large amounts of sulfate when it dissolved in solution.Through determination the content of sulfate radicals,then calculate the content of phosphorus gypsum in the solution,thus find the solubility of the phosphorus gypsum.Barium chromate spectrophotometry was adopted to determine the solubility of the phosphorus gypsum in the calcium sulphate solution.At 420 nm wave length,when the mass concentrations of calcium sulphate is at 0～0.50 mg/mL and it has a linear relation with chromate radicals.Compared with traditional methods,the reliability of the experimental results can be verified.The method is simple,rapid,the Barium chromate spectrophotometry method is applied to the determine the solubility of phosphorus gypsum.It has advantages of simplicity and strong feasibility,which can satisfy the To meet the requirement of determination.