基于原子吸收光谱法的食品中重金属检测方法优化研究

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Optimization of Heavy Metal Detection Method in Food Based on Atomic Absorption Spectrometry

JIANG Yan

（Lianjian （Shandong） Technology Co.，Ltd.，Yantai 26410o， China）

Abstract： Objective： To optimize the detection method of heavy metals in food based on atomic absorption spectrometryto ensure the scientific monitoring offood safety. Method： Different substrates，acid systems，digestion temperature （150，180， 200∘C ） and digestion time （20，30，40 min） were used to optimize the digestion conditions. Adjust the light source current， slit width，gas flow rate，graphite furnace heating rate and background correction mode，optimize the instrument detection parameters. Result： The digestion temperature of HNO3 -HF-HCl system is 200°C and the digestion time is 40min ，which can improve the detection accuracy of heavy metals in food.After adjusting the light source current to 8mA ， slit width to 0.5nm ， gas flow rate to 2.0L⋅min-1 ，graphite furnace heating rate to 15∘C⋅s-1 ，and using Zeeman effect correction， the detection sensitivity can be increased by 5.32% to 9.87% Conclusion： The optimized method can efectively improve the reliability of food safety detection and provide scientific basis for food heavy metal pollution monitoring.

Keywords： atomic absorption spectrometry; food safety; heavy metal detection

食品中重金属污染严重威胁消费者健康，长期摄入重金属超标的食品会导致神经毒性、肾损伤及致癌风险[1]。（剩余3098字）