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利用激光探针与等离子体质谱联机技术（ＬＡＭ－ ＩＣＰＭＳ） 同时测定岩石样品中３５ 个元素。 对岩石标样的碱熔玻璃进行了系统的ＬＡＭ－ ＩＣＰＭＳ 方法研究。结果表明， 采用散焦（ｄｅｆｏｃｕｓ） 激光束扫描法获得了连续稳定的分析信号， 并提高了分析灵敏度和分析精密度。该法测定Ｐ 的检出限为０．１ ％ ，Ｓｃ 、Ｔｉ、Ｖ、Ｃｒ、Ｍｎ 、Ｃｏ 及Ｎｉ 的检出限为１ ．６ ×１０－ ６ ～１２ ×１０ － ６ ， Ｇａ 、Ｒｂ 、Ｓｒ 及Ｂａ 的检出限为０ ．２ ×１０ － ６ ～０ ．６ ×１０－ ６ ， 其余２１ 个微量元素的检出限为１０ － ９ 级； 内部精度优于１５ ％ ， 外部精度优于１０％ 。３ 个岩石标样（ＮＴＵＧ－ １ 、ＮＴＵＧ－ ２ 及ＮＴＵＧ－ ３） 的测量结果表明ＬＡＭ－ ＩＣＰＭＳ 是一种同时测定岩石样品多元素的快速有效方法。
Simultaneous Determination of 35 Elements in Rock Samples by Laser Probe and Plasma Mass Spectrometry Online Technology (LAM-ICPMS). A systematic LAM-ICPMS method was used to study the alkali-fused glass of rock samples. The results show that a continuous and stable analytical signal is obtained using a defocus laser beam scanning method, and the analysis sensitivity and the analysis precision are improved. The detection limit of P was 0.1%. The detection limit of Sc, Ti, V, Cr, Mn, Co and Ni was 1. 6 × 10-6 ~ 12 × 10-6, and the detection limits of Ga, Rb, Sr and Ba are zero. 2 × 10 - 6 ~ 0. 6 × 10- 6, and the detection limits of the remaining 21 trace elements ranged from 10 to 9; the internal accuracy was better than 15% and the external accuracy was better than 10%. Measurements of three rock samples (NTUG-1, NTUG-2 and NTUG-3) show that LAM-ICPMS is a fast and efficient method for the simultaneous determination of multiple elements in rock samples.