食盐中氯化钠测定结果计算方案的建立

Establishment of calculation scheme for determination results of sodium chloride in table salt

中文关键词:  氯化钠  离子  优先结合次序

英文关键词:sodium chloride  ion  priority binding order

中文摘要:

      目的 补充标准中氯化钠检测方法的计算过程。方法 依据标准GB 5009.42-2016《食品安全国家标准 食盐指标的测定》和系列标准GB/T 13025《制盐工业通用试验方法》测定食盐中各离子含量, 然后根据产品中所含离子的优先结合次序, 利用质量守恒定律构建氯化钠结果的计算模型。结果 明确了硫酸根离子与钙离子含量差异。根据化合物结合的3种可能性; ①硫酸钙、硫酸镁、硫酸钠、氯化钠; ②硫酸钙、硫酸镁、氯化镁、氯化钠; ③硫酸钙、氯化钙、氯化镁、氯化钠, 正确选择计算方案。结论 本研究便于检测操作者对标准的理解, 为快速、批量计算氯化钠结果提供参考。

英文摘要:

      Objective To supplement the calculation process of the sodium chloride detection method in the standard. Methods Ion content in salt was determined using standard GB 5009.42-2016 Food safety national standard-Determination of salt index and series standard GB/T13025 General test method in salt industry, and then the calculation model of the sodium chloride result was constructed by the conservation of mass according to the preferential binding order of the ions contained in the product. Results The content difference between sulfate ion and calcium ion was clarified. According to the 3 possibilities of compound binding: ① calcium sulfate, magnesium sulfate, sodium sulfate, sodium chloride, ② calcium sulfate, magnesium sulfate, magnesium chloride, sodium chloride; ③ calcium sulfate, calcium chloride, magnesium chloride, chlorine sodium, the calculation plan was correctly selected. Conclusion This study facilitates the detection of the operator's understanding of the standard and provides a reference for the rapid and batch calculation of sodium chloride results.