王水溶样酸溶法分解试样对磷矿石和磷精矿中氧化铝含量测定的影响

Effect of Aqua Regia Acid Dissolution Method on Determination of Alumina Content in Phosphate Ore and Phosphorus Concentrate

利用《磷矿石和磷精矿中五氧化二磷含量的测定磷相酸喳琳重量法和容量法》(GB/T 1871.1-1995)检测磷矿石和磷精矿中五氧化二磷含量时,酸溶法(王水溶样法)后,按《磷矿石和磷精矿中氧化铝含量的测定容量法和分光光度法》(GB/T 1871.3-1995)进行,但用磷酸铁(铝)分离-EDTA容量法测定氧化铝含量时,遇到测定数据偏低、重现性差,以及磷矿购销合同执行中频繁出现氧化铝含量复检、仲裁纠纷争议等问题。对王水溶样酸溶法分解试样存在问题的原因进行了探讨,提出了酸溶法(王水溶样法)的适用范围,并建议增加氢氟酸-硫酸-高氯酸的酸溶法,以及采用新型仪器进行快速测量。

On the determination of phosphorus pentcontent in GB/T 1871.1-1995 phosphate ore and phosphate concentrate phosphate acid lim weight method and capacity method acid solution(Aqua regia method)sample decomposition,according to the determination of GB/T 1871.3-1995 phosphate ore and phosphate concentrate alumina content capacity method and spectrophotometry iron phosphate(aluminum)separation-EDTA capacity method to determine the alumina content,encountered the determination data is low,poor reproducibility,and frequently in the phosphate ore sales contract alumina content review,arbitration disputes and thinking.The issues related to the decomposition of samples using the aqua regia acid dissolution method were examined,and recommendations were made for expanding the application scope of this method.It was suggested to enhance the acid dissolution process by incorporating hydrofluoric acid,sulfuric acid,and perchloric acid,as well as utilizing advanced instrumentation for rapid analysis.