【摘要】 在硫酸介质中，硒（IV）与铱来铬青蓝R形成黄色络合物。该络合物在433nm处有最大吸收，当有表面活性剂Tritonx－100存在时，灵敏度大大提高，络合物的表现摩尔吸光系数ε433＝6．47×104，硒含量在0～20μg／25mL范围内服从比尔定律。该方法用于水样中痕量硒的测定，结果令人满意。更多还原

【Abstract】 A new colour reaction of Se(IV ) with Solochrome Cyanine R has been developed spectrophotometrically .In the presence of H2SO4 and Triton X -100 ,Se (IV)can form a yellow complex ,The maximum absorption is at 433nm ,and its apparent molar absorptivity is 6. 47× 104L/(mol. cm).Beer’s law is followed over the range of 0-20μ g Se(IV )25mL.The method has beenapplied to the determination of Se in the water samples ,and the results obtained are satisfactory更多还原