食品科学 ›› 2005, Vol. 26 ›› Issue (12): 189-190.
• 分析检测 • 上一篇 下一篇
严小平, 李成平
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YAN Xiao-Ping, LI Cheng-Ping
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摘要: 基于稀磷酸介质中亚硝酸根催化溴酸钾氧化橙黄Ⅳ的褪色反应,建立测定痕量亚硝酸根的新方法。方法检出限为0.56×10-6g/L,线性范围为0.03~10.00μg/ml,回收率为98.5%~100.4%。该方法已用于食品中亚硝酸根的测定,结果满意。
关键词: 亚硝酸根, 溴酸钾, 橙黄Ⅳ
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 words: nitrite, potassium bromate, orange Ⅳ
严小平, 李成平. 催化光度法测定痕量亚硝酸根的研究及在食品中的应用[J]. 食品科学, 2005, 26(12): 189-190.
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