王水消解-原子荧光光谱法测定辣木茶中的汞、砷和硒

Determination of mercury,arsenic and selenium in Moringa tea by atomic fluorescence spectrometry method with the samples dissolved in aqua regia

采用王水消解-原子荧光光谱法测定辣木茶中的汞、砷和硒,结果表明:辣木茶中的汞、砷残留量分别为0.0144mg/kg、0.3270mg/kg,均符合国家有关茶叶重金属残留的质量安全要求,辣木茶硒含量达0.1350mg/kg,与茶叶相比属于富硒食物;王水消解-原子荧光光谱法测定辣木茶中的汞、砷和硒,具有精密度高、准确性好、灵敏度高、干扰少、操作简便的优点,是一种切实可行的食品重金属元素检测方法。

Mercury, arsenic and selenium in Moringa tea were determined by atomic fluorescence spectrometry method with the samples dissolved in aqua regia. The results show that： The mercury and arsenic residue in Moringa tea were 0. 0144 and 0. 3270 mg/kg respectively, which conformed to the national quality safety requirements of heavy metal residue in tea. The selenium content in Moringa tea was 0. 1350 mg/kg, which belonged to the selenium-rich food compared with tea. The method of mercury, arsenic and selenium determination in Moringa tea by atomic fluorescence spectrometry with the samples dissolved in aqua regia was a kind of feasible methods of heavy metal element in food which showed advantages of high precision,good accuracy,high sensitivity,less interference,and simple operation.