Abstract: The ashing loss of Pb in water samples has been studied in digestive method for determination of lead by dithi文摘:对国标5750-85双硫腙分光光度法中消化水样时铅的灰化损失进行了探讨，针对某些污染严重的水样，改进了消化处理的条件，有效地消除了灰化损失，提高了铅加标回收率，保证了分析测试数据的精密度和准确度。