流动注射法测定磷石膏制水泥中铝含量

Determination of Aluminium Oxide in Producing Cement from Phospho-cypsum by Flow Injection Analysis

摘要: 研究了反相流动注射分光光度法测定磷石膏制水泥中Al2O3含量。通过微波熔样,采用铬天青S作显色剂,抗坏血酸作干扰抑制剂,校正曲线并校正氟干扰。在波长540 nm条件下测定,线性范围为0 g·L-1~1.2×10-3 g·L-1,相对标准偏差为3.1%,回收率为95%~105%。样品测定速度为100样/h。

Abstract: The method of determination of Al2O3 in cement from phospho cypsum by flow injection analysis is developed by means of melting samples by microwave oven and using CAS as chromogenic reagent and Vc as interference free reagent for Fe3+.The interference of Fe- can be eliminated by means of calibration curves.The amounts of Al2O3 are detected in the range of 0~1.2×10-3 g·L-1 with RSD 3.1%,recovery rate 95%~105% and the detection rate 100 sumples·h-1.