【摘要】 研究了罗丹明B与B rO3-的褪色反应,确定了最佳反应条件,建立了一种光度法测量微量溴酸根离子的新方法.结果表明:在盐酸介质中溴酸根氧化罗丹明B褪色,最大吸收波长为556 nm,方法的表观摩尔吸光系数ε5′56=1.5×105L.mol-1.cm-1,检出限为1.12×10-8g.mL-1,线性范围为0.0~18.0μg.(25 mL)-1.用于化学试剂中溴酸根离子的测定,结果满意.更多还原

【Abstract】 A new method for the determination of trace bromate is proposed in this paper.The optimum conditions for the oxidation of rhodamine B by bromate in hydrochloric acid medium are studied.The maximum absorption peak is located at 556 nm with an apparent molar absorptivity of 1.5×10 5 L·mol-1 ·cm-1.The detection limit is 1.12×10-8 g·mL-1 and the linear range is 0.0～18.0 μg·(25 mL)-1 of bromate.The proposed method has been applied in determining of trace bromate in chemical reagents with satisfactory results.更多还原