分光光度法与ICP-MS法测定面制品中铝含量

Determination of aluminum content in flour products by spectrophotometry and ICP-MS

铝是一种具有毒性的金属元素,通过食物进入体内后,会影响人体的健康,过量摄入会导致疾病的发生。食品中经常检测出含铝的食品添加剂,目前国家标准中检测面制品中铝含量的方法为分光光度法。分别采用国标分光光度法和ICP-MS法测定面制品中铝含量,并比较两种方法的检出限、准确度以及回收率。结果表明,两种方法具有良好的相关性,准确度和回收率都比较高,在统计学上无显著性差异。但分光光度法操作繁琐,试剂消耗大;ICP-MS法试剂用量少,检出限低,稳定性好,检测效率高,是值得推广应用的一种检测方法。

Aluminum is a kind of metal elements with low toxicity, which can enter into human body with food. Excessive intake will lead to illness. The food additives containing aluminum were frequently detected in foods. At present, spectrophotometry is recommended as a method for detection of aluminum content in flour products in the national standard. The aluminum content in flour products was determined by spectrophotometry and inductively coupled plasma mass spectrometry （ ICP - MS） respectively, to compare their detection limit, accuracy and recovery rate. The results showed that the two methods had relativity with high accuracy and recovery rate, without significant difference in statistics. But the detection by spectrophotometry had the demerit of complex operation and more reagent consumption compared with ICP - MS, which had many advantages such as less amount of reagent consumption, lower detection limit, with good stability and high efficiency, which was worth popularizing and applying in determination of aluminum content in flour products.