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Catalytic Spectrophotometric Determination of Trace Nitrite and Food Application

Chengping Li

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Abstract

A new catalytic spectrophotometic method for determination of trace nitrite was developed. The method was based on the catalytic effect of NO2 on oxidation of orange Ⅳ by potassium bromate in H3PO4 medium. The detection limit for nitrite was 0.56×10-6gL.The linear range of the determination was 0.03～10.00μgml and the recovery was among 98.5%～100.4%. The method was applied to direct determination of nitrite in food with satisfactory results.

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What this paper is about

A new catalytic spectrophotometic method for determination of trace nitrite was developed. The method was based on the catalytic effect of NO2 on oxidation of orange Ⅳ by potassium bromate in H3PO4 medium. The detection limit for nitrite was 0.56×10-6gL.The linear range of the determination was 0.03～10.00μgml and the recovery was among 98.5%～100.4%. The method was applied to direct determination of nitrite in food with satisfactory results.

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Available abstract

A new catalytic spectrophotometic method for determination of trace nitrite was developed. The method was based on the catalytic effect of NO2 on oxidation of orange Ⅳ by potassium bromate in H3PO4 medium. The detection limit for nitrite was 0.56×10-6gL.The linear range of the determination was 0.03～10.00μgml and the recovery was among 98.5%～100.4%. The method was applied to direct determination of nitrite in food with satisfactory results.

Key concepts: Potassium bromate, Nitrite, Detection limit, Chemistry, Catalysis, Linear range, Orange juice, Bromate

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