【摘要】 在 0 .4 mol/ L硫酸介质中亚硝酸根对溴酸钾氧化胭脂红酸的褪色反应的催化作用 ,建立了高灵敏测定痕量亚硝酸根的新方法。室温下方法的线性范围为 2— 5 0 ng/ m L,检出限为 0 .4 ng/ m L。利用该方法对几种河水水样进行测定 ,结果令人满意更多还原

【Abstract】 A highly sensitive method for the determination of trace amounts of nitrite was established based on catalytic effect on the oxidation of carminic acid with bromate in acidic media.Under optimized conditions of 0.7×10 -2mol/L KBrO 3,1.8×10 -4mol/L carninic acid,0.4mol/L H 2SO 4 at 25℃,the detection limit for nitrite is 0.4ng/mL in the linear range of the determination of 2-50ng/mL.The method was used to determine trace nitrite in river water with satisfactory results.更多还原