过磷酸钙中硫含量的测定方法研究

Study of Determination Method of Sulfur Content in Calcium Superphosphate

采用不同消解方法和测定方法对过磷酸钙中硫含量的测定进行研究。试验结果表明:以100 m L(1+5)盐酸溶液消解过磷酸钙,采用重量法和电感耦合等离子体发射光谱法测定硫含量均能获得满意的结果,此方法准确度高、精密度好。重量法虽然经典,但操作繁琐,而电感耦合等离子体发射光谱法操作便捷。

Different digestion methods and determination methods have been used to study the determination of sulfur content in calcium superphosphate. Experimental results show that calcium superphosphate is digested with 100 mL （1 ＋ 5 ） hydrochloric acid solution, satisfactory results are obtained in determination of sulfur content with both gravimetric method and inductively coupled plasma atomic emission spectrometry, these methods have high accuracy, and good precision. Although gravimetric method is a classic method, its operation is more cumbersome, while the operation of inductively coupled plasma atomic emission spectrometry is convenient.