Abstract: To investigate the pollution status of eight harmful elements in milk fan and milk cakes. Milk fan and milk cake were sampled from representative farmers’ markets and supermarkets in some districts or counties of a certain city. The samples were digested by a wet digestion method using graphite, and eight harmful elements including arsenic, lead, mercury, cadmium, chromium, boron, aluminum and barium in the digested samples were simultaneously detected by inductively coupled plasma mass spectrometry (ICP-MS) and quantified by an internal standard method. Neither milk fan nor milk cake samples were found to be contaminated by mercury or cadmium, and the contamination levels of boron, arsenic, barium and lead was relatively low; however, the milk fan samples were seriously polluted by aluminum and chromium, and the contamination level of barium in milk cakes was relatively high. Both milk fan and milk cake samples contained chromium, barium and lead, and the contamination level of the former was higher than that of the latter. Accordingly, relevant departments should strengthen supervision over milk fan and milk cake workshops, standardize the production processes, strictly control the potential pollution links, and strengthen supervision over pollution in the production process to ensure product quality and safety.

Key words: milk fan; milk cake; harmful elements; inductively coupled plasma mass spectrometry; food safety

摘要： 对市售乳扇和乳饼样品中8 种有害元素污染情况进行调查分析。对某市部分区县具有代表性的农贸市场及超市的乳扇和乳饼进行采样，并将样品通过石墨湿法消解，采用电感耦合等离子体质谱法检测，内标法定量，同时测定分析样品中砷（As）、铅（Pb）、汞（Hg）、镉（Cd）、铬（Cr）、硼（B）、铝（Al）、钡（Ba）8 种有害元素。结果表明：市售乳扇和乳饼样品未受金属元素Hg和Cd的污染，受元素B、As、Ba及Pb污染程度相对较轻，但乳扇样品被元素Al和Cr污染较严重，乳饼中Ba元素污染程度相对较高；乳扇和乳饼样品中普遍含有Cr、Ba和Pb元素，乳扇中元素污染程度大于乳饼，相关部门应加强对乳扇和乳饼作坊的监管，规范生产工艺，严格把关污染环节，加强生产环节污染监管力度，确保此类乳制品的质量安全。

关键词: 乳扇；乳饼；有害元素；电感耦合等离子体质谱法；食品安全