ICP-AES测定膨化食品中Al和重金属元素的含量

摘要

采用HNO3-H2O2（5∶3，体积比）为溶样试剂，以微波消解和电感耦合等离子体原子发射光谱法联用，同时测定5种膨化食品薯片、虾条、小馒头、爆米花和雪饼中汞、铅、镉、砷和铝5种有害金属元素的含量。结果表明，在最佳实验条件下，0.5 g膨化食品中各元素的加标回收率在在99.00%～106.36%之间，RSD分别在1.74%～3.57%，检出限介于0.017μg/L～0.257μg/L。%As, Hg, Cd, Pb and Al in the potato chips, shrimp strips, Plain Bun, popcorn and white cake were determined by ICP-AES after micro wave digestion with HNO3∶H2O2(Volume ratio=5∶3) mixture. The results showed that the average recoveries for all elements were 99.00%to 106.36%, RSD were 1.74%to3.57%and detection limits were 0.017μg/L-0.257μg/L under optimum experiment condition.