微波消解-电感耦合等离子体质谱法同时测定雄蚕蛾中8种元素

Simultaneous determination of 8 kinds of elements in male silkworm moths by inductively coupled plasa mass spectrometry

中文关键词:  微波消解  电感耦合等离子体质谱法  雄蚕蛾

英文关键词:microwave digest  inductively coupled plasma mass spectrometry  male silkworm moths

中文摘要:

      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)法同时测定雄蚕蛾中钠、锰、镁、铜、钙、铁、硒和锌8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测定雄蚕蛾中钠、锰、镁、铜、钙、铁、硒和锌8种元素的含量。结果 8种元素线性良好, 相关系数为0.9995~0.9999; 钠、锰、镁、铜、钙、铁、硒和锌的检出限分别为0.04、0.0004、0.003、0.003、0.01、0.004、0.0005、0.006 mg/kg; 8种元素的回收率在91.3%~98.6%之间, 相对标准偏差(relative standard deviation, RSD)≤3.7%(n=6)。结论 该方法灵敏度高、稳定性好, 可以满足雄蚕蛾中钠、锰、镁、铜、钙、铁、硒和锌的同时测定。

英文摘要:

      Objective To establish a method for simultaneous determination of 8 elements (including sodium, manganese, magnesium, copper, calcium, iron, selenium and zinc) in male silkworm moths 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 72Ge as an internal standard solution, and the content of sodium, manganese, magnesium, copper, calcium, iron, selenium and zinc in the male silkworm moths were determinate by ICP-MS. Results Eight elements had good linear relationships and the correlation coefficients were 0.9995-0.9999. The limits of detection of sodium, manganese, magnesium, calcium, iron, selenium, copper and zinc were 0.04, 0.0004, 0.003, 0.003, 0.01, 0.004, 0.0005, and 0.006 mg/kg, respectively. The recoveries of 8 elements were in the range of 91.3%-98.6%. The relative standard deviations (RSDs, n=6) of the method were less than 3.7%. Conclusion The method has high sensitivity and good stability, which is suitable for the determination of sodium, manganese, magnesium, calcium, iron, selenium, copper and zinc in male silkworm moths.