【摘要】 本文研究了硝酸介质中痕量α，α′－ｂｉｐｙ阻抑过二硫酸钾氧化甲基蓝褪色的新指示反应及其动力学条件，建立了动力学光度法测定α，α′－ｂｉｐｙ的新方法。方法灵敏度为１．１×１０^－１０ｍｏｌ／Ｌ，测定范围为０～２．８×１０^－７ｍｏｌ／Ｌ。更多还原

【Abstract】 In nitric acid media,a trace amount of α,α′-bipyridyl inhibits the discolouration of methyl blue by potassium persulphate.The kinetic aspect of this inhibition reaction was studied,and a new kinetic spectrophotometric method based on this reaction for the determination of tracea,α′-bipyridylhas been proposed.The sensitivity of the method is 1.1×10-10mol/L,and the range is 0～2. 8×10-7mol/L.更多还原