摘要
研究了在硫酸介质中酸性铬蓝K与铬(Ⅵ)有褪色反应,采用了分光光度法测定微量铬(Ⅵ)。实验表明,有色溶液的最大吸收波长为525 nm,线性范围在0-20μg／25 mL间,符合比尔定律,检出限为1.72×10-8g／mL。此法可用于天然水和工业废水中铬(Ⅵ)的测定,结果满意。
A gpectrophotometric method for the determination of trace chromium(Ⅵ)has been used. The decoloring of acid chrome blue K oxidized by chromium(Ⅵ) in medium sulfuric acid has been studied.The maximum absorbance is at 525 nm, Beer's law is obeyed in the concentration range of 0-20 μg /25 mL the detection limit is 1.72×10-8 g/mL.The method has been applied to the determination of Cr(Ⅵ) in water and industry water with satisfactory results.
出处
《河北化工》
2004年第5期69-70,共2页
Hebei Chemical Industry
关键词
褪色光度法
铬(VI)
酸性铬蓝K
decolorant spectrophotometry
chromium(Ⅵ)
acid chrome blue K
