汽化法测定岩矿中微量氯和溴  

Vaporization Separation and Sepectrophotometric Determinations of Trace Chlorine and Bromine in Rocks and Ores

作　　者：林大华 钟尚文 Lin Dahua;Zhong Shangwen

机构地区：[1]地质矿产部南京综合岩矿测试中心

出　　处：《岩矿测试》1987年第4期299-301,I0012,共4页Rock and Mineral Analysis

摘　　要：氯是地壳中较丰富的元素之一,电负性高,化学性质十分活泼。火山喷气中含有大量的氯化氢气体,岩浆热液及渗流热卤水等含氯较高的流体,可以溶解大量金属元素生成新的化合物进行迁移,它们在一定物理化学条件下分解沉淀,富集成矿。The sample is decomposed and oxidized by 2:1 H_(2)SO_(4) and 1.5%K_(2)Cr_(2)O_(7) mixed solution in a specially designed vaporization chamber by heating at 100-110℃for 5 hours.The chlorine and bromine vapor is absorbed with Na_(2)CO_(3)-Glycerin solution in a small dish within the chamber.The dish was removed from the chamber,and chlorine determined spectrophotometrically with Hg-(CNS)_(2)and bromine with fluorescein.The results obtained are satisfactory.

关 键 词：物理化学条件 热卤水 岩浆热液 富集成矿 氯化氢气体 岩矿 火山喷气 金属元素 

分 类 号：P61[天文地球—矿床学]