微波消解-分光光度法测定膨化食品中铝的含量

Determination of aluminum content in puffed food by microwave digestion-spectrophotometric method

中文关键词:  铝  微波消解  分光光度法  膨化食品

英文关键词:aluminum  microwave digestion  spectrophotometric method  puffed food

中文摘要:

      目的 建立微波消解-分光光度法测定膨化食品中铝的方法。方法 采用微波消解法代替酸消解法处理样品, 在GB 5009.182-2017《食品安全国家标准 食品中铝的测定》方法的基础上对检验条件(络合物显色稳定性、溶液pH、反应时间等)进行优化。结果 在优化条件下, 铝在0~5 μg范围内线性良好(r=0.9997), 样品加标回收为91.0%~99.0%, 相对标准偏差为0.46%~1.09%。结论 与国标法中湿法消解法相比, 微波消解法显色更稳定、消解试剂用量更少、过程更环保, 且前处理液可用于其他金属元素联测, 对实现低碳绿色分析具有现实意义。

英文摘要:

      Objective To establish a method for determination of aluminum in puffed food by microwave digestion and spectrophotometry method. Methods The samples were treated by microwave digestion instead of acid digestion. On the basis of GB5009.182-2017 Determination of aluminium in food, the test conditions (including color stability of complex, solution pH, reaction time, etc.) were optimized. Results Under the optimized conditions, aluminum had a good linear relationship in the range of 0-5 μg (r=0.9997), and the recoveries were 91.0%-99.0%, with the relative standard deviations of 0.46%-1.09%. Conclusion Compared with the national standard method, the microwave digestion method has more stable color, less reagent dosage and more environmental protection, and the pretreatment solution can be used for the combined measurement of other metallic elements, which has practical significance for the realization of low-carbon green analysis.