微波消解-电感耦合等离子体原子发射光谱法测定海参中铝的残留量

Determination of aluminum in sea cucumber by inductively coupled plasma atomic emission spectrometry-microwave digestion for sample preparation

中文关键词:  海参  铝  微波消解  电感耦合等离子体原子发射光谱

英文关键词:sea cucumber  aluminum  microwave digestion  inductively coupled plasma atomic emission spectrometry

中文摘要:

      目的 建立微波消解-电感耦合等离子体原子发射光谱测定海参中铝含量的方法, 并对北京市场中海参中铝含量进行初步调查。方法 抽取市场上37个海参样品, 经5 mL硝酸微波消解后, 采用电感耦合等离子体原子发射光谱法进行测定。结果 该方法检出限为5.0 mg/kg, 加标回收率为95%~105%。通过单因素方差分析, 本方法的测定结果与国标方法测定所得的数据结果无显著差异。测定的37个样本中均检出铝, 其中最低含量为29.2 mg/kg, 最高含量为304 mg/kg, 100 mg/kg以上的样本占62.2%。结论 本方法具有准确度高、精密度好、操作简单、分析速度较快等特点。从市场抽样检测结果来看, 海参中铝安全应该引起一定的重视, 建议生产企业进一步改进生产工艺, 确保海参质量安全。

英文摘要:

      Objective To establish a method for the determination of aluminum in sea cucumber by inductively coupled plasma atomic emission spectrometry (ICP-AES)-microwave digestion for sample preparation, which was applied to detect the sea cucumber in Beijing market. Methods The content of aluminum of 37 market sold sea cucumbers were determined by inductively coupled plasma atomic emission spectrometry after digestion with 5 mL HNO3. Results The detection limit of the method was 5.0 mg/kg, with the recoveries varied from 95%~105%, Compared with the national standard method, the results were not significantly difference by using the single factor analysis of variance. Aluminum of 37 samples were detected, of which the content was in the range of 29.2~304 mg/kg. The ratio of samples was accounted for 62.2%, which the aluminum concentration was over 100 mg/kg. Conclusion This method has the advantages of high accuracy, good precision, simple operation, and rapid analysis. From the market sampling results, the safety of aluminum in the sea cucumber should be paid more attention by a certain importance. It is recommended to enterprise to further improve the production process to ensure sea cucumber quality and safety.