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Kinetic Determination of Trace Amounts of Nitrite Using an Optical Chemical Sensor
Author(s) -
Afkhami Abbas,
Madrakian Tayyebeh,
Aleseyyed Seyyed Bahman
Publication year - 2012
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201100273
Subject(s) - optode , nitrite , absorbance , detection limit , chemistry , trace amounts , linear range , spectrophotometry , inorganic chemistry , chromatography , ion , organic chemistry , nitrate , medicine , alternative medicine , pathology
An optical chemical sensor (optode) is proposed for the kinetic determination of nitrite ion. The optode was fabricated by the immobilization of methyl violet on a triacetylcellulose polymeric membrane. Methyl violet is covalently bonded to a transparent triacetylcellulose film. By immersion of the sensor into an acidic nitrite solution, the absorbance of the sensor at 596 nm decreases with time that is due to the reaction of nitrite with the immobilized methyl violet. A fixed time method of 15 min was used to monitor the reaction. The linear range for the determination of nitrite was 0.20–8.00 µg mL −1 and the limit of detection was 0.08 µg mL −1 . The optodes were one‐shot, they had durability more than 2 months and were easily prepared. The optode was successfully applied to the determination of nitrite ion in spring water and sewage samples.