在酸性介质中,肼能使溴酸钾-HCl与丁基罗丹明B反应体系的吸光度增强,据此建立了水中痕量肼的光度分析新方法.用固定时间法优化了试剂浓度、反应温度和反应时间,并考察了20多种物质和离子的干扰情况.在所选择的实验条件下测定肼,线性范围为0.98～88.6μg/L,方法检出限为0.87 μg/L.方法用于湖水和塑料工业含肼污水中肼的测定,结果与直接比色法相吻合,回收率均在106%～108%之间.
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