Iron meteorites from Nandan, Guangxi ; Wushike, Xinjiang; Shangdu, Hebei and Huangling, Hubei are investigated with a spark souree mass speetrometer for their Cr, Ni, Co, Cu, Zn, Ga, Ge, As, Mo, Ru, Rh, Pd, Os and Ir contents. The accuracy of the results and the factors affecting it are discussed. It is preliminarily concluded,while textural evidences of these meteorites are also taken into account, that the Nandan, Wushike and Shangdu meteorites belong to IA, Ⅲ .4 and ⅢE groups respectively. The Ni, Ga and Ge contents in the Huangling iron meteorite come close to that of mesosiderites.
Spark-source mass spectrometry for quantitative analysis of Apollo-17 lunar rock(70017-291) is described. About 5rag powder lunar rock sample, without any eanduetive material mixed in it, was pressed on the surface of T type electrode. A single exposure was made under the optimum condition After development,the relative sensitivity, coefficients are calculated on the basis of the single exposure by U.S. Geological Survey Standard Rock AGV-1. More than 20 elements be be determined by this technique with a typical precision of ± 20%.
