亚硝酸盐溶液作为高锰酸钾消耗量测试标准样品可行性研究

Feasibility Research of Using Nitrite Solution as a Standard Sample for Potassium Permanganate Consumption Test

中文关键词: 食品接触材料  高锰酸钾消耗量  亚硝酸盐溶液  标准样品

英文关键词: food contact materials  potassium permanganate consumption  nitrite solution  standard samples

中文摘要:

      目的 研究亚硝酸盐溶液作为食品接触材料高锰酸钾(KMnO4)消耗量测试标准样品的可行性。方法 将亚硝酸盐溶液标准物质配制成不同浓度的样品溶液，按照GB 31604.2—2016进行KMnO4消耗量的测试。结果 当亚硝酸盐溶液的质量浓度为0.5~20 mg/L时，KMnO4消耗量测试结果的平行性较高;亚硝酸盐浓度和KMnO4消耗量的线性相关系数R²高达0.999;将与亚硝酸盐反应的KMnO4理论用量与实际用量进行对比，比值为97.7%~109.5%，理论值与实际值之间的差距较小;样品的加标回收率为102.8%~109.2%，满足实验室内部质量控制的要求。结论 将亚硝酸盐溶液作为KMnO4消耗量检测项目质量控制标准样品满足要求，对于保证该检测项目结果的准确性具有重要意义。

英文摘要:

      The work aims to investigate the feasibility of using nitrite solution as a standard sample for potassium permanganate (KMnO4) consumption test in food contact materials. Standard solutions of nitrite were formulated as sample solutions with different concentrations and the KMnO4 consumption was tested according to GB 31604.2-2016. It was found that when the mass concentration of nitrite solutions was in the range of 0.5 mg/L to 20 mg/L, the KMnO4 consumption test results were in high parallelism, and the linear correlation coefficient R2 between nitrite concentration and KMnO4 consumption was as high as 0.999. The theoretical amount of KMnO4 reacted with nitrite was compared with the actual consumption, and the ratio was between 97.7% and 109.5%. There was a little difference between them. The recovery rate of the sample was between 102.8% and 109.2%, which met the internal quality control requirements of the laboratory. Nitrite solution meets the requirements of quality control standard sample for KMnO4 consumption test project. It has great significance for ensuring the accuracy of the test results.