Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (4): 492.

• Articles • Previous Articles     Next Articles

Studies on Kinetic Spectrophotometric Determination of Trace NO2- by Stopped-flow Injection Method

ZHANG Gui-Zhu, LIU Shan-Jun, HE Xi-Wen, SHI Hui-Ming   

  1. Department of Chemistry, Nankai University, Tianjin, 300071
  • Received:1992-07-08 Revised:1992-11-18 Online:1993-04-24 Published:1993-04-24

Abstract: Based on the catalytic effect of trace NO2- on the oxidation of Rhodamine Bby potassium bromate, a new kinetic spectrophotometric method for the determination of NO2- has been developed with stopped-flow injection technique.Beer's law is obeyed for NO2- in the range of 0.24-9.0 ng/ mLand the limit of detection is 2.4×10-10 g/mL.The method has been applied to the determination of NOf in water and the sampling frequency is 60 samples/h with satisfactory results.

Key words: Nitrite, Catalytic kinetic analysis, Stopped-flow injection method, Rhodamine B

TrendMD: