5-Br-PADAP-NO2--SCN-三元离子缔合物分光光度法测定微量NO2-的研究

Spectrophotometric Determination of NO2- with 5-Br-PADAP and SCN-

中文关键词:  5-Br-PADAP  ₂^-  分光光度法

英文关键词:2-(5-bromo-2-pyridylazo)-5-diethylaminophenol  NO₂^-  spectrophotometry

中文摘要:

      研究了在硫酸介质中5BrPADAP与NO₂^-和SCN-形成三元离子缔合物的最佳条件,其表观摩尔吸光系数ε₅₅₀=2.4×10⁴L/(mol·cm),缔合物组成比为n(5BrPADAP):n(NO₂^-):n(SCN-)=1:1:1.提供了测定微量NO₂^-离子的新方法,应用于环境水体中微量NO₂^-离子的测定,结果较为满意。

英文摘要:

      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.