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Selective determination of nitrite/nitrate based on photo‐induced redox activity of titanium dioxide
Author(s) -
Wang Lijuan,
Wang Qiuquan
Publication year - 2018
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201800482
Subject(s) - nitrite , nitrate , titanium dioxide , chemistry , redox , nitrogen dioxide , inorganic chemistry , environmental chemistry , materials science , organic chemistry , metallurgy
Given its unique photocatalytic and structural properties, titanium dioxide was used as a sensitizer for the quantification of nitrite and nitrate contents by high‐performance liquid chromatography with ultraviolet/nano‐titanium dioxide photo‐induced chemiluminescence detection. The photo‐induced chemiluminescence signal was enhanced after the introduction of titanium dioxide. Ethylenediaminetetraacetic acid, as a positive hole scavenger, considerably improved the signal. The peak area of the chemiluminescence signal was enhanced 85 times after ethylenediaminetetraacetic acid was added to 1 × 10 −6 mol/L of nitrite. The detection limits of nitrite and nitrate were 9.0 × 10 −9 and 1.4 × 10 −7 mol/L, respectively. Our method was applied for the determination of nitrite and nitrate contents in water samples. In contrast to other methods, our method is simple and environmentally friendly and enables the simultaneous determination of nitrite and nitrate.