非完全消化-FAAS法测定小食品中的微量元素

Determination of Microelement in Pot Foods in Noncomplete Digestion-FAAS

以非完全消化法处理样品,用火焰原子吸收法成功地测定了小食品中的一些微量元素。用La3+作为钙的释放剂。对样品处理条件、化学干扰、背景吸收干扰、试液的物理性质与其空白溶液的一致性、检出限及特征浓度进行了考察。测定结果的相对标准偏差小于3.7%,本方法测定结果与灰化法一致,相对误差小于±3.3%。

The samples of pot foods were treated with noncomplete digestion method. A number of microelements in pot foods were successfully determined with FAAS. La^3＋ were used as releasing agent for Calcium. The pretreatment condition of sample, chemical interference, background absorption interference, identity of the physical properties for test solution and its blank solution, the detection limit and characteristic concentration were studied. RSD＇s were less than 3.7 %. The determination results of this method were consistent with those obtained by ashing method. The relative errors were less than ±3.3 %.