【摘要】 本文提出了Cr(Ⅵ)-二苯碳酰二肼体系的高灵敏度流动注射分析法,结合离子交换分离、酸性高锰酸钾氧化法,测定了含还原性物质较多的城市废水中的Cr(Ⅵ)和总Cr。本方法回收率89％～103％,相对标准偏差0.25％～2.5％。更多还原

【Abstract】 In this paper,a high sensitive flow injection analysis method for the reaction between Cr(Ⅵ) and 1,5--diphenylcarbazide is presented. Combine the ion exchange separation with acidic potassium permanganate oxidization,the Cr(Ⅵ) and total Cr of the urban wastewater which contain a lot of reductant was determinated. The recover ratio is 89%～103%, relative standard deviation is 0.25%～2.5%.更多还原