引用本文:
侯永根, 王余明, 迟锡增. 磷酸三丁酯萃取原子吸收光谱法测定微量Cr(Ⅲ)和Cr(Ⅵ)[J]. 应用化学,
1988, 5(5): 96-99.
Citation: Hou Yonggen, Wang Yuming, Chi Xizeng. TRACE DETERMINATION OF CHROMIUM(Ⅲ) AND CHROMIUM(Ⅵ) BY EXTRACTION WITH TRI-n-BUTYLPHOSPHATE AND ATOMIC ABSORPTION SPECTROPHOTOMETRY[J]. Chinese Journal of Applied Chemistry, 1988, 5(5): 96-99.
Citation: Hou Yonggen, Wang Yuming, Chi Xizeng. TRACE DETERMINATION OF CHROMIUM(Ⅲ) AND CHROMIUM(Ⅵ) BY EXTRACTION WITH TRI-n-BUTYLPHOSPHATE AND ATOMIC ABSORPTION SPECTROPHOTOMETRY[J]. Chinese Journal of Applied Chemistry, 1988, 5(5): 96-99.
磷酸三丁酯萃取原子吸收光谱法测定微量Cr(Ⅲ)和Cr(Ⅵ)
English
TRACE DETERMINATION OF CHROMIUM(Ⅲ) AND CHROMIUM(Ⅵ) BY EXTRACTION WITH TRI-n-BUTYLPHOSPHATE AND ATOMIC ABSORPTION SPECTROPHOTOMETRY
Abstract:
A sensitive and accurate method for trace determination of Cr(Ⅲ) as well as Cr(Ⅵ) is proposed in which Cr(Ⅵ) is extracted by tri-n-butylphosphate(TBP) and analyzed by flame atomic absorption spectrophotometry.The presence of Cr(Ⅲ),with its concentration up to 500-fold to Cr(Ⅵ),does not affect the result.In the method,Cr(Ⅲ) is oxidized to Cr(Ⅵ) by KMnO4 at 100℃ in H2SO4 solution using CO(NH2)2 as a protection agent, and then determined by subtraction of the original Cr(Ⅵ) content from the total Cr (Ⅵ) content.Samples of drinking water and water from Huang-Pu River were determined for Cr(Ⅲ) and Cr(Ⅵ).The results was satisfied,It is considered that the sensitivity of the method lies on the formation of a solvation compound Cr(Ⅵ)-TBP-Cl-.
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Key words:
- Chromium ion
- / Trace analysis
- / Atomic absorption spectrophtometry
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