原生态金秋梨中微量元素锌的光谱测定

Spectrometric determination of the content of trace element zinc in primary ecological ‘Jinqiu’ pear

测定黔东南苗族侗族自治州原生态“苗疆”牌台江金秋梨中微量元素锌的含量。方法：用正交试验优化仪器最佳工作条件，微波消解样品，火焰原子吸收光谱法（FAAS）测定微量元素锌。结果：“苗疆”牌金秋梨锌元素含量为3．1mg／Kg，方法的特征浓度为0．0057μg,／mL，检出限为0．0079μg／mL，相对标准偏差为0．62％，加标回收率在98％-102．7％之间，适用于金秋梨中微量元素锌的测定。结论：“苗疆”牌金秋梨微量元素锌的含量较高，具有很高的食用价值和药用价值。

Objective： To determine the contents of the trace element zinc in primary ecological “ miao jiang” brand ‘Jinqiu＇ pear, Taijiang, Qiandongnan Miao ＆ Dong Autonomous Prefecture. Method：Working conditions of optimized instrument by orthogonal experimental design, microwave samples and flame atomic absorption spectrophotometry （FAAS）were used to determine the trace element zinc. Result： The content of trace element zinc in “Miao jiang” brand ‘Jinqiu＇ digestion content of pear was 3.1mg/kg. The characteristic concentration was 0.0057μg/mL. The detection limit was 0.0079μg/ ml. The relative standard deviation was 0.62%. The recovery rate were 98%-102.7% ,which was adapted to the determination of trace element zinc in ‘Jinqiu＇ pear. Conclusion： “Miao jiang” brand ‘Jinqiu＇ pear has a high znic content. So it has a very high edible value and medicinal value. The method was simple, accurate and with a high sensitivity.