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本文叙述了在0.1N盐酸介质中,以磷酸三丁脂(TBO)萃取富集铬(VI)以与大量钒等杂质分离。然后,于萃取溶剂TBP中,加入适量(1+1)硫酸及二苯碳酰二肼(DPC)显色测定铬。灵敏度为0.1微克/毫升。
This article describes the enrichment of chromium (VI) with tributyl phosphate (TBO) in 0.1 N hydrochloric acid to separate impurities such as vanadium. Then, in the extraction solvent TBP, adding appropriate amount of (1 + 1) sulfuric acid and diphenylcarbazide (DPC) chromogenic determination of chromium. Sensitivity of 0.1 μg / ml.