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投稿时间：2018-07-17
投稿时间：2018-07-17
中文摘要: 为优化食用明胶中微量铬测定方法，通过微波消解，湿法消解，干法灰化等3种前处理方法，采取原子吸收-石墨炉法和电感耦合等离子质谱法测定明胶中铬含量。结果表明，食用明胶经硝酸-双氧水消解体系进行微波密闭消解，采用原子吸收-石墨炉法测定其微量铬，铬在0～16 ng/mL浓度范围内线性关系良好，相关系数r2=0.999 1，方法检出限为0.01 mg/kg，加标平均回收率98.7%，相对标准偏差1.7%（n=7），质控样测定结果接近其中值。
Abstract:Abstract：In order to find a better method for determination of trace chromium in edible gelatin，the content of chromium in gelatin was determined by atomic absorption-graphite furnace method and inductively coupled plasma mass spectrometry through microwave digestion，wet digestion and dry ashing.The results showed that edible gelatin was digested with nitric acid and hydrogen peroxide in a microwave sealed digestion system，and the trace chromium was determined by graphite furnace atomic absorptionspectrometry method.the linear relationship of chromium was good in the concentration range of 0-16 ng/ml，the correlation coefficient r2=0.999 1，its detection limit was 0.01 mg/kg，its average recovery rate was 98.7%，and RSD value was 1.7%（n=7），the results of quality control material was close to the median.
keywords: edible gelatin trace chromium graphite furnace atomic absorptionspectrometry inductively coupled plasma mass spectrometry quality control material
文章编号：201905036 中图分类号： 文献标志码：
基金项目:
| Author Name | Affiliation |
| ZAN Chuan-nan | Guangxi-ASEAN Center For Food and Drug Safety Control，Nanning 530021，Guangxi，China |
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