水中铅的测定方法比较

Method Comparison of Lead Determination in Water

由于水中铅的含量较低,常用的测定方法是石墨炉原子吸收法和氢化物发生-原子荧光法。通过对干扰的消除方法、检出限实验、加标回收实验以及检测消耗时间和涉及药品试剂等方面的比较,得出石墨炉原子吸收法和氢化物发生-原子荧光法检测水中铅的优劣:石墨炉原子吸收法前处理较为简单,所涉及药品较少,成本较低,适合大批量样品检测;氢化物发生-原子荧光法的精密度高于石墨炉原子吸收法,适合于科研型实验研究。

Because the content of lead in water is low, the commonly used two methods are graphite furnace atomic absorption spectrophotometry and hydride atomic fluorescence method. Through comparing eliminating interference, detection limit, standard addition recovery experi-ments and testing time consuming and drug agents, etc, concluded the advantages and disadvan-tages of these two methods： The pretreatment of the graphite furnace is simpler, less involved in drugs, low cost, suitable for bulk sample detection; The precision of the hydride atomic fluores-cence method is higher than no flame atomic absorption method, is suitable for fine experimental research.