LI Xin, CHEN Zhi-guo, LIU Xi-lin. Spectrophotometric Determination of NO2- with 5-Br-PADAP and SCN-[J]. Analysis and Testing Technology and Instruments, 2000, (2): 106-108.
Citation:
LI Xin, CHEN Zhi-guo, LIU Xi-lin. Spectrophotometric Determination of NO2- with 5-Br-PADAP and SCN-[J]. Analysis and Testing Technology and Instruments, 2000, (2): 106-108.
LI Xin, CHEN Zhi-guo, LIU Xi-lin. Spectrophotometric Determination of NO2- with 5-Br-PADAP and SCN-[J]. Analysis and Testing Technology and Instruments, 2000, (2): 106-108.
Citation:
LI Xin, CHEN Zhi-guo, LIU Xi-lin. Spectrophotometric Determination of NO2- with 5-Br-PADAP and SCN-[J]. Analysis and Testing Technology and Instruments, 2000, (2): 106-108.
Spectrophotometric Determination of NO2- with 5-Br-PADAP and SCN-
The ion association system of protonated 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) SCN- and NO2- inH2SO4 medium was studied. The molar absorptivity is 2.4×104 L/(mol·cm) and the composition ratio of n((5-Br-PADAP):n(NO2-):n(SCN-) is 1:1:1. The method can be used for determining trace NO2- in waters.
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