Catalytic Spectrophotometric Determination of Ultratrace Amounts of Nitrite

Chem. J. Chinese Universities ›› 1991, Vol. 12 ›› Issue (11): 1457.

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Catalytic Spectrophotometric Determination of Ultratrace Amounts of Nitrite

Zheng Zhao-sheng, Wu He-zhou, Zhao Wen-zhong

Department of Chemistry, Fuzhou University, Fuzhou, 350002

Received:1990-08-06 Online:1991-11-24 Published:1991-11-24

Abstract

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 H₃PO_4.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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Zheng Zhao-sheng, Wu He-zhou, Zhao Wen-zhong . Catalytic Spectrophotometric Determination of Ultratrace Amounts of Nitrite[J]. Chem. J. Chinese Universities, 1991, 12(11): 1457.

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Catalytic Spectrophotometric Determination of Ultratrace Amounts of Nitrite

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