重金属指密度4.0以上的约60种元素或密度在5.0以上的45种元素。重金属通过空气、水、食物等渠道进入体内,与体内有机成分结合成金属络合物或金属螯合物,从而对人体产生危害。随着人们生活水平的提高,环境意识的不断增强,对重金属的关注度越来越高,相关标准相继出台,国内外对水和食品类的重金属含量都有很严格的规定限制。关于重金属的检测,现有的检测方法有:比色法、色谱法、电化学法、原子吸收光谱法(AAS)、电感耦合等离子光谱法(ICP-AES)等。在以上诸多方法中,原子吸收光谱法(AAS)虽然具有较低的检测限, Heavy metals refer to approximately 60 elements at a density of 4.0 or more or 45 elements at a density of 5.0 or more. Heavy metals through the air, water, food and other channels into the body, combined with the organic components of the body into metal complexes or metal chelates, which harm the human body. With the improvement of people’s living standard, the continuous improvement of environmental awareness and the growing concern about heavy metals, the relevant standards have been promulgated one after another, and domestic and foreign countries have very strict restrictions on the heavy metals content of water and foodstuffs. For the detection of heavy metals, the existing detection methods include colorimetry, chromatography, electrochemical methods, atomic absorption spectroscopy (AAS), and inductively coupled plasma spectrometry (ICP-AES). Among the above methods, although atomic absorption spectrometry (AAS) has a lower detection limit,