高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (S1): 368.

• Molecular Spectroscopy • 上一篇    下一篇

A Study on the Color Reaction of Nickel with a New Chromogenic Reagent 1- (5-Nitro-2-Pyridylazo) - 2.7 - Dihydroxy - naphthalene and its Application

SUN Jia-Juan, BAI Yu-Wei, ZHAO Wei, LIU Bin   

  1. Department of Chemistry, Xian yang Teacher's College, Xian yang 712000, P. R. China
  • 出版日期:1999-12-31 发布日期:1999-12-31
  • 基金资助:

    supported by the Science Research Foundation of Shaaxi Educational Committe

A Study on the Color Reaction of Nickel with a New Chromogenic Reagent 1- (5-Nitro-2-Pyridylazo) - 2.7 - Dihydroxy - naphthalene and its Application

SUN Jia-Juan, BAI Yu-Wei, ZHAO Wei, LIU Bin   

  1. Department of Chemistry, Xian yang Teacher's College, Xian yang 712000, P. R. China
  • Online:1999-12-31 Published:1999-12-31
  • Supported by:

    supported by the Science Research Foundation of Shaaxi Educational Committe

PDF (PC)

摘要：

There has been study on heterocyclicazo reagent for the determination of microamount of nickel,but no study on the color reactron of nickel with a new chromogenic reagent 1- (5 -nitro - 2 - pyridylazo) - 2.7 - dihydroxy - naphthalene (5- NO2 - PADN). So, here is a systematic study on condition under which the color reaction takes place. It proved that within PH 5.5~6.5,the maximnm absotption of the reagent lies at 460nm, that of the 2:1 turquoise chelate by 5 - NO2 - PADN with nickel (Ⅱ) together is 650nm, and the apparent absorptivity is 1.02×105 L · mol-1 · cm-1. The proposed method can be applied in the standard steel and the determination of microamounts of nickel in ore with satisfactory results.

Abstract:

There has been study on heterocyclicazo reagent for the determination of microamount of nickel,but no study on the color reactron of nickel with a new chromogenic reagent 1- (5 -nitro - 2 - pyridylazo) - 2.7 - dihydroxy - naphthalene (5- NO2 - PADN). So, here is a systematic study on condition under which the color reaction takes place. It proved that within PH 5.5~6.5,the maximnm absotption of the reagent lies at 460nm, that of the 2:1 turquoise chelate by 5 - NO2 - PADN with nickel (Ⅱ) together is 650nm, and the apparent absorptivity is 1.02×105 L · mol-1 · cm-1. The proposed method can be applied in the standard steel and the determination of microamounts of nickel in ore with satisfactory results.

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