微波消解-火焰原子吸收法测定平湖糟蛋中锌含量

Determination of zinc content in Pinghu egg preserved in rice wine by microwave digestion-flame atomic absorption spectrometry

目的：建立利用微波消解样品,火焰原子吸收法测定平湖糟蛋中锌含量的检测方法。方法加入8 mL HNO3+2 mL H2O2组成的消化液,采用多阶段程序升温,最后微波消解-火焰原子吸收法测定。结果测得平湖糟蛋中锌含量范围18.10~24.76 mg/kg,锌的回收率96.45%～103.27%,相对标准偏差(relative standard deviation, RSD)为2.07%。结论本方法操作简便、污染少、回收率高,测定结果准确可靠。

Objective To establish a method to determine zinc content in Pinghu egg preserved in rice wine by microwave digestion-flame atomic absorption spectrometry. Methods Samples was added by di-gested solution including 8 mL HNO3 and 2 mL H2O2, and determined by microwave digestion-flame atomic absorption spectrometry after multi-step warming program. Results Zinc content in Pinghu egg preserved in rice wine ranged from 18.10 mg/kg to 24.76 mg/kg, zinc recovery rate was 96.45%～103.27%, and the relative standard deviation (RSD) was 2.07%. Conclusion The developed method is easy to operate, environ-ment-friendly with high recovery rate. The result is accurate and reliable.