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矿石中微量钽,通常利用在草酸铵溶液中,与焦性沒食子酸生成之黄色絡合物或以过氧化氫氧化为过钽酸进行比色測定,这些方法灵敏度均不够高,干扰元素也很多,需要在盐酸溶液中,用丹宁将钽反复沉澱,以与钛铁……等元素分离。也有以紙纖維等方法进行分离杂質的,但手续多較繁琐。近来等在Weming和Stevenson等工作的基础上,研究了在4％(NH_3)_2C_2O_4和0.4NHF溶液中,以苯萃取結晶紫钽有色絡合物。試驗中,我們发現钽与結晶紫的反应,在酒石酸一氟氫酸介質中更为灵敏,且可容許相当量的杂質,
Ore trace tantalum, usually in the use of ammonium oxalate solution, with the pyrogallol yellow complex formed or hydrogen peroxide oxidation of tantalic acid for colorimetric determination, these methods are not high enough sensitivity, interference elements Also a lot, you need to hydrochloric acid solution, tantalum tannin repeatedly precipitation, with titanium and iron ... ... and other elements separated. There are also methods such as paper fiber to separate impurities, but more complicated procedures. Recently, aiming at the work of Weming and Stevenson et al., We studied the extraction of crystal violet tantalum complex with benzene in 4% (NH 3) _2C_2O_4 and 0.4NHF solution. In the experiment, we found that the reaction of tantalum with crystal violet is more sensitive in the tartaric acid-hydrofluoric acid medium and can tolerate considerable amounts of impurities,