PDF《电感耦合等离子发射光谱法测定乳制品中的 铝含量》

第8卷第10 期食品安全质量检测学报Vol.

8 No.

10 2017 年10 月Journal of Food Safety and Quality Oct. ,

2017 *通讯作者: 梁志坚, 主任技师, 主要研究方向为食品和饮用水中重金属污染物.E-mail: 1262417332@qq.com *Corresponding author: LIANG Zhi-Jian, Chief Technician, Kunming City Center for Disease Control and Prevention, Kunming 650228, china. E-mail: 1262417332@qq.com 电感耦合等离子发射光谱法测定乳制品中的 铝含量 王秋波, 洪雪花, 荣国琼, 梁志坚* (昆明市疾病预防控制中心, 昆明 650228) 摘要: 目的 建立电感耦合等离子发射光谱法测定乳制品中铝的分析方法, 并进一步优化样品前处理方 法. 方法 采用微波消解法处理牛奶和乳扇样品, 电感耦合等离子发射光谱测定样品中的铝含量, 并进行了连 续测定

7 次的精密度实验和加标回收准确度实验.结果 铝元素在 0~10 mg/L 范围内线性关系良好, 方法的 检出限是 0.6 mg/kg, 定量限是 1.8 mg/kg, 其精密度为 5.09%~ 6.05%, 加标回收率 94%~ 101.92%. 通过测定市 售乳制品发现, 牛奶中铝含量正常, 乳扇中铝含量偏高. 结论 本方法简便准确, 为研究乳制品中金属元素含 量提供一定参考. 关键词: 乳制品;

食源性铝;

电感耦合等离子发射光谱法 Determination of aluminum content in dairy products by inductively coupled plasma optical emission spectrometry WANG Qiu-Bo, HONG Xue-Hua, RONG Guo-Qiong, LIANG Zhi-Jian* (Kunming City Center for Disease Control and Prevention, Kunming 650228, China) ABSTRACT: Objective To establish a method for the determination of aluminum elements in selling dairy by inductively coupled plasma optical emission spectrometry, and optimize the preprocess method. Methods Milk and milk fan samples were preprocessed by microwave digestion method and detected by inductively coupled plasma emission spectrometry. The precision recovery experiment was carried out by continuous determination for

7 times. Results Aluminum element had good linear relationships in the range of 0~10 mg/L, the limit of detection was 0.6 mg/kg and limit of quantitation was 1.8 mg/kg, recovery of standard additions was in the range of 94%~ 101.92% and precision of 5.09%~ 6.05%. Market dairy products were detected, and found that the content of aluminum in selling milk was normal and the selling dairy fan was high. Conclusion This method is simple and accurate, and provides a reference for the research of the content of metal elements in dairy products. KEY WORDS: dairy;

food borne aluminum;

inductively coupled plasma optical emission spectrometry

1 引言铝是地壳中含量最多的金属元素之一, 但铝并非是 人体所必需的微量元素[1] .微量元素与人体健康有很大关 系.近年来, 随着对铝的研究逐渐深入, 铝的生物毒性也 逐渐被人们关注.世界卫生组织、联合国粮农组织于

1989 年正式将铝确定为食品污染物加以控制, 长期摄入超出联 合国食品添加剂专家委员会制定的铝暂定每周耐受摄入量 第10 期 王秋波, 等: 电感耦合等离子发射光谱法测定乳制品中的铝含量

3879 (provisional tolerable weekly intake, PTWI)

2 mg/(kg・bw), 则有可能导致铝在人体内积蓄, 造成记忆力减退、免疫功 能抑制及神经传导受阻, 并与肾病、高血压、糖尿病等有 相关性[2] ;

我国也于

1994 年提出了铝的限量标准[3] . 一般食物中铝主要来源于含铝食品添加剂, 包括用 于面制品的膨松剂;