电感耦合等离子体原子发射光谱法测定焦炭中的磷

摘要

The sample is dissolved by nitrate and hydrofluoric acid, adding hydrofluoric acid heated to smoke. The phosphorus in coke was investigated by ICP-AES. The analytical line is 213.618 nm, the background interference and the light source noise were eliminated by deducting synchronous background, and the working conditions of the instruments were selected. The results show that the method is simple and fast, detecting limit is 0.010μg/mL, RSD(n=8)is 1.034%and the recovery is from 98.7%to 101.4%. This method was applied to sample analysis, and the results were in good agreement with other method.%　　用HNO3和HF溶解样品,加HClO4冒烟,采用ICP-AES直接测定焦炭中的磷.分析谱线为213.618 nm,通过同步背景扣除消除背景干扰及光源噪音,选定了仪器的最佳工作条件.结果表明,该方法简单快捷,检出限为0.010μg/mL,RSD (n=8)为1.034%,加标回收率在98.7%~101.4%,用于实际样品分析,测定结果与标准值和其他方法的测定值相符.