便携式重金属分析仪测定水中14种重金属元素

Determination of 14 Heavy Metal Elements inWater by the Portable Heavy Metal Analyzer

近年来,重金属污染突发事故时有发生,危害人民的财产和人身安全。为突发事故风险评估和补救措施制定提供及时可靠的数据支持,发展一种快速、便捷、准确的现场应急监测方法迫在眉睫。为满足工作需求,本文采用便携式重金属分析仪对水中Cu、Cd、Pb、Zn、Hg、As、TI、Mn、Ag、Sb、Ni、Cr、Fe和Co14种元素进行测定,溶出伏安法监测中Cu、Cd、Pb、Zn、Hg、As、TI、Mn、Ag、Sb和Ni的检出限为0.14~1.47μg/L,比色法中Cu、Cr、Ni、Pb、Fe、Co和Mn元素的检出限为4.8~23.5μg/L,样品加标回收率为84.0%~117%,平行测定3次的RSD<5%。

Abrupt heavy mental pollution occurred more and more frequently in recent years,which threatened the wealth se-curity and human health.For risk-assessment studies and follow-up remediation projects,developing a method for rapid field detection to monitor the emergency accident was necessary.Aiming at the demand for rapid field detection,in this the-sis,the portable heavy metal analyzer was applied to detect Cu,Cd,Pb,Zn,Hg,As,Tl,Mn,Ag,Sb,Ni,Cr,Fe and Co in water,which provided significant accuracy,with recovery rate of 84.0%-117%,and relative standard deviation of less than 5%,and low determination limits in the range of 0.14μg/L-1.47μg/L for stripping voltammetry,4.8μg/L-23.5μg/L for colorimetric method.Experimental results showed high reliability and strong field application capacity to meet the needs of field applications with significant advantages.