吉林Ⅰ号陨石陨硫铁微量系统分析

Mierospecimons of troilite from the Jilin meteorite No. Ⅰ, weighing only 200--500 micrograms, have been determined for S, Fe, Ni and Co. The sample is firstly decomposed by 6 N hydrochloric acid mixed with hydroxylanine hydrochloride at room tcmperature. Simultaneously, tellurium ions (To^4 ) are added to combine with divalent sulfur into TeS2. Excess tellurium is determined spectrophotometrieally. The sulfur content is indirectly obtained by substracting the excess tellurium from the total amount added. After extraction and separation, each of the other elements is colormetrically determined. The results are satisfactory.