高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (11): 1457.
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郑肇生, 吴和舟, 赵文忠
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福建省自然科学基金
Zheng Zhao-sheng, Wu He-zhou, Zhao Wen-zhong
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摘要: 迄今为止,有关动力学法测定亚硝酸根的报道甚少,笔者实验发现,在磷酸介质中,以溴酸钾氧化中性红,亚硝酸根具有高催化活性,据此,我们研究了适宜的催化反应条件,以及共存离子的影响。
关键词: 催化光度法, 中性红, 亚硝酸根
Abstract: A new catalytic spectrophotometric method for determining ultratrace amounts of NO2- has been developed. The method is based on the catalytic oxidation of neutral red by potassium bromate in the solution of diluted H3PO4.The sensitivity of the method is 2. 6 ×10-12g/mLof nitrogen in NO2-(△A=0. 001, b=1 cm), the linear range of determination is 2. 0× 10-4-8.0×10-3pg/mLfor NO2-. The method has been used to determine trace NO2- in water samples.
Key words: Catalytic spectrophotometric method, Neutral red, Nitrite
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郑肇生, 吴和舟, 赵文忠. 催化光度法测定超痕量亚硝酸根. 高等学校化学学报, 1991, 12(11): 1457.
Zheng Zhao-sheng, Wu He-zhou, Zhao Wen-zhong . Catalytic Spectrophotometric Determination of Ultratrace Amounts of Nitrite. Chem. J. Chinese Universities, 1991, 12(11): 1457.
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