ICP-AES/ICP-MS法测定飞灰浸出液重金属及其干扰消除

Determination of Heavy Metals of Fly Ash Extract by ICP-AES/ICP-MS and its Interference Cancellation

采用醋酸缓冲液对飞灰样品进行浸提,经硝酸消解后,用ICP-AES测定消解液中的铜、镍、铅、锌、铬、镉等重金属元素。测定结果与ICP-MS进行比对,发现铅的测定结果有较大正偏差。通过模拟浸出液的背景水平,找出主要干扰元素为铝,并计算出铝的干扰系数为0.0011,用该系数对飞灰浸出液校正ICP-AES测定结果正确。

Heavy metals such copper, nickel, lead, zinc, chromium and cadmium in fly ash were extracted with acetic acid buffer solution, digested by HN03 solution, and determined by ICP-AES. The results compared with 1CP-MS, found that the determination results of lead has deviation. Do the simulation of fly ash to identify the main interference element is AI, then calculate the coefficient is 0.0011. The coefficient is found to be reliable, verifying by actual samples.