原子吸收光谱法测定水果中10种元素含量及分布

目的调查水果中锌、铜、钾、钙、镁、锰、铅、镉、铬和硒10种元素含量分布情况。方法采用湿法消解水果样品,火焰原子吸收光谱法检测水果中的锌、铜、钾、钙、镁和锰的含量,石墨炉原子吸收光谱法检测铅、镉、铬和硒的含量。结果 10种元素在水果中各部位的分布有比较大的差异。葡萄、干枣和木瓜中铅含量接近于污染物浓度限量,但没有超过标准。国光苹果、梨、干枣和圣女果中铬的含量都超标。国光苹果、香蕉、梨、干枣、木瓜和柚子中均不同程度检出硒,但没有超过污染物浓度限量。葡萄和干枣中的铜含量超过标准。锌的含量没有超过标准。木瓜中钙含量最高,干枣中镁和锰含量最高。干枣、柚子和圣水果中含钾较高。结论水果果籽中各种元素含量最高,果肉中含量最低。果皮中各种元素含量比果肉中高。

Ten element contents and their distribution in fruits determinated by atomic absorption spectrometry

Objective To investigate the contents and distributions of the Zn,Cu,K,Ca,Mg,Mn,Pb,Cd,Cr and Se elements in the fruits.Methods The fruit samples were digested with wet method.Contents of zinc,copper,calcium,magnesium,potassium and manganese were determined by flame atomic absorption spectrometry(FAAS).Contents of lead,cadmium,chromium and selenium were determined by graphite furnace atomic absorption spectrometry(GFAAS).Results There existed differences for the element distribution in each part of the fruit...