高等学校化学学报

高等学校化学学报 ›› 1987, Vol. 8 ›› Issue (1): 33.

• 论文 • 上一篇    下一篇

2,6-二甲酚双波长分光光度法同时测定水中NO3-及NO2-的研究

张有贤, 潘丽瑛, 赵敏, 高瓦玲   

  1. 山西大学化学系
  • 收稿日期:1985-09-17 出版日期:1987-01-24 发布日期:1987-01-24

Dual-Wavelength Spectrophotometric Determination of Nitrate and Nitrite with 2,6-Xvlenol

Zhang Youxian, Pan Liying, Zhao Min, Gao Waling   

  1. Department of Chemistry, Shanxi University, Taiyuan
  • Received:1985-09-17 Online:1987-01-24 Published:1987-01-24

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摘要： 水中NO3-和NO2-的一般光度法同时测定已见报导,但其操作手续均较麻烦。2,6-二甲酚光度法单独测定NO2-或NO2-虽已有报导,可是它们相互干扰。我们采用双波长光度法,测定NO3-和NO2-在H2SO4介质与2,6-二甲酚的反应产物,既免除了它们的相互干扰,又达到同时测定的目的。

Abstract: Nitrate and nitrite react with 2,6-xylenol in H2SO4solution. On the basis of this fact we simutaneously determined nitrate and nitrite with dual-wavelength at 318nm-290.5nm and 305.5nm-332.5nm. Beer's law is obeyed in the range 0.00-19.03μg NO3--N/25ml and 0.00-12. 00μg NO2--N/25ml and △ε318;390.5nm is 2.3×103and △ε305,332.5nm is 4.74×103. After neutralization of solution with NaOH, spectra took place bathochromic shift and nitrate and nitrite can be determined with dual-wavelength at 417.5nm-359nm and 384nm-463.5nm. Beer's law is obeyed in the range 0.00-7.61μg NO3--N/25ml and 0.00-4.8μg NO3--N/25ml and △ε417.5,359nm is 1.13×104and △ε384,463.5nm is 1.29×104This methed was applied to determine of nitrate and nitrite in water.

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