摘要
目的建立微波消解-石墨炉原子吸收光谱法检测食品中铝的方法。方法以GB 5009.182-2017《食品安全国家标准食品中铝的测定》的石墨炉原子吸收光谱法为基础,以发酵面制品为例,微波消解样品,优化了石墨炉原子吸收光谱法检测条件,建立适合本实验室食品中铝的检测方法。结果在优化实验条件下,铝在0.0~200.0 ug/L范围内呈线性关系,相关系数达到0.9984,加标回收率在95.60%~97.08%之间。选择铝的灵敏线309.3 nm检测,方法检出限达到0.163 mg/kg,相比国家标准提高了1倍。优化了消解罐清洗方式,有效降低了消解罐本底值,提高了检测的准确性。结论本研究优化了微波消解-石墨炉原子吸收光谱法的检测方法,建立的方法能够满足日常检测要求。
Objective To establish a method for determination of aluminum in food by graphite furnace atomic absorption spectrometry coupled with microwave digestion. Methods According to graphite furnace atomic absorption spectrometry of GB 5009.182-2017 National food safety standard-Determination of aluminum in foods, fermentation products were used as examples, and the conditions of microwave digestion and graphite furnace atomic absorption spectrometry were optimized. The detection method of aluminum in food was established in the laboratory. Results Under the optimized experimental conditions, the linear range of aluminum was 0~200.0 ug/L with the correlation coefficient of 0.9984. The recoveries were 95.60%~97.08%. When the detection wavelength of aluminum was 309.3 nm, the limit of detection reached 0.163 mg/kg, which was half of the national standard. The digestion tank cleaning method was optimized, the bottom value of digestion tank was effectively reduced, and the accuracy of detection was improved. Conclusion The established method optimizes conditions of microwave digestion and graphite furnace atomic absorption spectrometry, which can meet the requirements of routine testing.
出处
《食品安全质量检测学报》
CAS
2017年第12期4736-4740,共5页
Journal of Food Safety and Quality
基金
江苏省南通市科技局社会发展计划(qyz15087)~~
关键词
微波消解
石墨炉原子吸收光谱
面制品
铝
microwave digestion
graphite furnace atomic absorption spectrometry
flour product
aluminum
