本文采用磷酸直接溶解样品,在不分离基体的情况下,用ICP-AES(电感耦合等离子体发射光谱)内标法直接测定YAP激光晶体中单掺铈、双掺铒、钬的含量取得满意的结果。精度±3％左右,回收率约98—105％。文中还对溶液的磷酸浓度、基体浓度对被测元素的谱线强度以及被测双掺元素相互之间的影响进行了研究,并选择了铕作为内标较为适 In this paper, phosphoric acid was used to dissolve the sample directly, and the content of singly-doped cerium, double-doped erbium and holmium in YAP laser crystal was determined by ICP-AES (internal standard method of inductively coupled plasma-atomic emission spectrometry) result. Accuracy of ± 3%, the recovery rate of about 98-105%. In this paper, the concentration of phosphoric acid in the solution and the concentration of the matrix on the spectral line intensity of the element under test and the influence of the measured two-doped elements on each other were also studied, and it is more appropriate to select europium as the internal standard