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。因此,氯是一个重要的矿化剂和找矿指示元素。溴亦类似。 近年由于区域化探等地球化学研究的需要,要求检测小于10ppm氯,小于1ppm溴,小于0.1ppm碘,根据氯溴易挥发的性质,对于酸可溶矿样我们研制了几种汽化吸收器,经试验以图1的结构为最好。本法同以往的汽化法完全不同,可称一克或几克矿样,氯溴吸收于0.5ml碳酸钠-甘油中,用光度法测定。检测限降低一个数量级。如用离子谱法或微型选择性电极法测定可降低2个数量级,这是其它分离富集方法难以达到的,同时,采用硫酸 Chlorine is one of the more abundant elements in the crust, with high electronegativity and a very lively chemical character. Volcanic jet contains a large amount of hydrogen chloride gas, hydrothermal fluids and seepage hot brine and other high chlorine content of the fluid can dissolve a large number of metal elements to generate new compounds for migration, they are under certain physical and chemical conditions precipitation, enrichment of mineralization. Therefore, chlorine is an important mineralizer and ore prospecting element. Bromine is similar. In recent years, due to the need of geochemical research such as regional geochemical exploration, it is required to detect less than 10ppm chlorine, less than 1ppm bromine and less than 0.1ppm iodine. According to the volatile nature of chlor-bromine, we developed several vaporization absorbers for acid- After testing the structure of Figure 1 is the best. This law is completely different from the previous vaporization method, which can be described as one gram or several grams of mineral sample. Chlorobromide is absorbed in 0.5 ml of sodium carbonate-glycerin and measured by spectrophotometry. The detection limit is reduced by an order of magnitude. As measured by ion-exchange or micro-selective electrode method can be reduced by two orders of magnitude, which is difficult to achieve by other separation and enrichment methods, the same time, the use of sulfuric acid