石墨湿法消解-电感耦合等离子体质谱法检测云南夕阳葵花子中6种微量元素的含量

Determination of 6 trace elements in Xiyang sunflower seeds of Yunnan province by graphite wet digestion-inductively coupled plasma mass spectrometry

中文关键词:  夕阳葵花子  微量元素  电感耦合等离子质谱法

英文关键词:Xiyang sunflower seeds  trace elements  inductively coupled plasma mass spectrometry

中文摘要:

      目的 建立石墨湿法消解-电感耦合等离子体质谱法检测云南夕阳葵花子中镁、钙、锰、铁、铜、锌6种金属微量元素的含量。方法 以浓硝酸为消解液, 石墨消解仪对样品进行前处理, 电感耦合等离子体质谱同时测定瓜子中的6种金属元素, 内标法定量。 结果 6种元素均在0~100 μg/L的浓度范围内线性关系良好(r＞0.99), 加标回收率为87.12%~104.35%, 相对标准偏差为1.84%~3.31%, 质控样测定结果均在参考值允许范围内, 瓜子样品中6种元素均有检出, 但是夕阳葵花子中的元素含量相对更高。结论 该检测方法具有较好的精密度和准确度, 检测方便快捷, 适用于瓜子中金属元素含量的检测。云南云南夕阳葵花子中含有更为丰富的6种有益微量元素, 日常适量食用能帮助人体平衡对微量营养元素的需求。

英文摘要:

      Objective To establish a method for the determination of magnesium, calcium, manganese, iron, copper and zinc in the Xiyang sunflower seeds of Yunnan province by graphite wet digestion-inductively coupled plasma mass spectrometry. Methods The sample was pretreated with concentrated nitric acid as the digestion solution and the graphite furnace digestion analyzer. Totally 6 metal elements in the melon seeds were simultaneously determined by inductively coupled plasma mass spectrometry and quantitatived by internal standard method. Results The 6 kinds of elements had good linear relationships in the range of 0?100 μg/L(r>0.99). The standard recoveries were 87.12%?104.35%, with the relative standard deviations of 1.84%?3.31%. The results of the quality control samples were all within the allowable range of reference values and 6 elements in the seeds were detected, but the content of the elements in the Xiyang sunflower seeds were relatively higher. Conclusion The detection method has good precision and accuracy, and the detection is convenient and quick, and is suitable for detecting the content of metal elements in the seeds. Yunnan Xiyang sunflower seeds contain more abundant 6 kinds of beneficial trace elements, and daily consumption can help the body balance the demand for micronutrients.