双峰双波长分光光度法测定沈河水中的痕量铅

摘要

Based on the reaction between Pb2 + and Xylenol Orange (XO), a new method for determination of Pb was advanced which the new method is named as double peak double wavelength spectrophotometry (DPDWS). The sensitivity and selectivity were very high.%基于铅和二甲酚橙的络合反应体系，建立了双峰双波长分光光度法测定河水中的痕量铅的含量．在优化的实验条件下，该方法测定铅的检出限为0．0578ug／mL，线性范围为0．168—2．5ug／mL．方法的灵敏度和选择性较高．