电感耦合等离子体质谱法同时测定马鹿皮中9种元素

目的建立微波消解-电感耦合等离子体质谱(inductively coupled plasma mass spectrometry,ICP-MS)法同时测定马鹿皮中钠、锰、镁、钾、钙、铁、硒、铜和锌9种元素的含量的方法。方法样品经硝酸-过氧化氢微波消解后,通过在线加入内标溶液校正,以72Ge为内标,采用ICP-MS测定马鹿皮中钠、锰、镁、钾、钙、铁、硒、铜和锌9种元素的含量。结果 9种元素线性良好,相关系数为0.9995~1.0000;钠、锰、镁、钾、钙、铁、硒、铜和锌的检出限分别为4、0.007、0.2、1、1、0.3、0.004、0.009、0.05 mg/kg;9种元素的回收率在86%~116%之间;相对标准偏差(relative standard deviation,RSD)≤7.2%(n=6)。结论该方法灵敏度高、稳定性好,可以满足马鹿皮中钠、锰、镁、钾、钙、铁、硒、铜和锌的测定。

Simultaneous determination of 9 kinds of elements in red deer skin by inductively coupled plasma mass spectrometry

Objective To establish a method for simultaneous determination of 9 elements such as sodium, manganese, magnesium, potassium, calcium, iron, selenium, copper and zinc in red deer skin by microwave digestion-inductively coupled plasma mass spectrometry (ICP-MS). Methods The sample was digested with nitric acid-hydrogen peroxide by microwaves and corrected by on-line addition of 72G as an internal standard solution, and the content of sodium, manganese, magnesium, potassium, calcium, iron, selenium, copper and zinc in the deer skin were determinate by ICP-MS. Results Nine elements had good linear relationship, and the correlation coefficient were 0.9995~1.0000. The limits of detection of sodium, manganese, magnesium, potassium, calcium, iron, selenium, copper and zinc were 4, 0.007, 0.2, 1, 1, 0.3, 0.004, 0.009, 0.05 mg/kg, respectively. The recoveries of 9 elements were in the range of 86%~116%. The relative standard deviations (RSD, n=6) of the method were less than 7.2%. Conclusion The method has high sensitivity and good stability, which is suitable for the determination of sodium, manganese, magnesium, potassium, calcium, iron, selenium, copper and zinc in red deer skin.