【摘要】 水环境中的金属残留严重威胁人类的健康安全,急需快速、高效的金属残留检测技术。文章报道了自行建立的大气压电解液阴极辉光放电发射光谱装置。利用待测液体作为放电阴极进行大气压辉光放电实现了水体中金属离子的痕量检测。对配制的标准样品进行了定量测量,基于背景发射光谱的3σ计算,获得了大气压电解液阴极辉光放电光谱装置对Na,Li,Cu,Pb和Mn等5种金属元素的检测限,分别为0.008,0.005,1.1,2.06和1.95 mg.L-1。该装置在金属残留的实时在线检测领域具有应用前景。更多还原

【Abstract】 Toxic metal elements in waters and wastewaters contaminate the environment and greatly threaten the health of human beings,therefore developing a rapid monitor for metal residues in aqueous solutions is urgently required.In the present work,a new homemade apparatus of electrolyte cathode atmospheric glow discharge emission spectroscopy was developed and described.It can detect and discriminate many kinds of trace mental elements by atomic emission spectrum from atmospheric pressure liquid cathode glow discharge.In order to estimate the analytical performance of the present atmospheric pressure electrolyte cathode glow discharge emission spectroscopy system,the detection limit values for Na,Li,Cu,Pb and Mn were obtained based on 3σ of the background signal,and the current limits of detection were 0.008,0.005,1.1,2.06 and 1.95 mg·L-1,respectively.It demonstrates that the atmospheric pressure electrolyte cathode glow discharge emission spectroscopy has a promising application in real time measurements of metal residues in aqueous solutions.更多还原