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TiO 2 Nanotube Sensor for Online Chemical Oxygen Demand Determination in Conjunction with Flow Injection Technique
Author(s) -
Li Xuejin,
Yin Weiping,
Li Jianyong,
Bai Jing,
Huang Ke,
Li Jinhua,
Zhou Baoxue
Publication year - 2014
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143014x13975035524943
Subject(s) - chemical oxygen demand , aqueous solution , wastewater , detection limit , oxygen , linear range , chemistry , nanotube , analytical chemistry (journal) , flow injection analysis , process engineering , materials science , chromatography , nanotechnology , environmental science , environmental engineering , carbon nanotube , organic chemistry , engineering
A simple, rapid and environmental friendly online chemical oxygen demand (COD) analytical method based on TiO 2 nanotube sensor in conjunction with the flow injection technique was proposed to determine the COD of aqueous samples, especially for refractory organics, low‐concentration wastewater, and surface water. The new method can overcome the drawbacks of the conventional COD determination methods. The results show that with the new method, each analysis takes only about 1 to 3 min, the linear range is up to 1 to 500 mg·L −1 of the compound of interest, and the detection limit is 1 mg·L −1 . The COD values obtained by the proposed method are more accurate than those obtained by the conventional method.