原子荧光法检测食品中总汞的影响因素分析
内蒙古蒙牛乳业科尔沁有限责任公司, 检测实验室, 内蒙古通辽 028000
| 摘 要： | 随着国民对营养健康的重视度提高，食品质量安全也成为了人们日常关注的重点，其中汞及其化合物在自然界分布非常广泛，具有高挥发性、高毒性和有害蓄积的特点。本文对GB5009.17-2021《食品安全国家标准 食品中总汞及有机汞的测定》中第一法原子荧光光谱法在检测食品总汞时对样品前处理关键点、上机检测过程结合检测实验进行了全面分析。前处理关键点的分析主要包括：样品称量、检测器具的清洗及使用、微波消解过程酸的用量、微波消解程序的优化、设定及微波消解完成后对过量硝酸的消除方法等进行分析研究；样品在上机检测时对检测设备原子荧光光度计关键参数的分析包括：仪器参数的设定及优化方式、仪器关键部件的日常维护方式等方面；通过对整个检测过程各方面分析研究，找出影响检测结果准确性的主要因素进行改进和固化执行，进而更有效的提高测定结果的准确性。 |
| 关 键 词： | 原子荧光光谱; 总汞; 微波消解; 影响因素 |
| DOI： | 10.57237/j.wjfse.2022.01.005 |
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收稿日期: 2023-01-16
接受日期: 2023-03-15
在线出版日期: 2023-04-07
Aalnysis of Influencing Factors for the Detection of Total Mercury in Food by Atomic Fluorescence
Testing Laboratory, Inner Mongolia Mengniu Dairy Horqin Co., Ltd., Tongliao 028000, China
| Abstract: | With the increase of people's attention to nutrition and health, food quality and safety have also become the focus of people's daily attention, among which mercury and its compounds are widely distributed in nature, with high volatility, high toxicity and harmful accumulation. In this paper, the first method of atomic fluorescence spectroscopy in GB5009.17-2021 "National Food Safety Standard - Determination of Total Mercury and Organic Mercury in Food" was comprehensively analyzed in the detection of total mercury in food, and the key points of sample pretreatment, the on-machine detection process and the detection experiment were comprehensively analyzed. The analysis of key points of pretreatment mainly includes: sample weighing, cleaning and use of detection instruments, amount of acid in microwave digestion process, optimization and setting of microwave digestion program, and analysis and research on the elimination method of excess nitric acid after microwave digestion is completed. The analysis of the key parameters of the atomic fluorescence photometer of the detection equipment during the sample testing on the machine includes: the setting and optimization of the instrument parameters, the daily maintenance method of the key components of the instrument, etc.; Through the analysis and study of all aspects of the entire detection process, the main factors affecting the accuracy of the detection results are identified for improvement and solidification implementation, so as to more effectively improve the accuracy of the measurement results. |
| Keywords: | Atomic Fluorescence Method; Total Mercury; Microwave Digestion; Influencing Factors |
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