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Continuous flow determination of nitrite with membrane separation/chemiluminescence detection
Author(s) -
Aoki Toyoaki
Publication year - 1990
Publication title -
biomedical chromatography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 65
eISSN - 1099-0801
pISSN - 0269-3879
DOI - 10.1002/bmc.1130040311
Subject(s) - chemistry , chemiluminescence , tetrafluoroethylene , chromatography , nitrite , separator (oil production) , microporous material , stripping (fiber) , analytical chemistry (journal) , nitrate , physics , electrical engineering , organic chemistry , copolymer , thermodynamics , engineering , polymer
A method for the determination of nitrite in water utilizing a membrane separation process and a chemiluminescence detector, with the addition of air‐stripping and air‐carrier, is proposed. The microporous poly(tetrafluoroethylene) tube was used as separator to transfer nitric oxide (reduced by iodine in acidic media) into a gas phase. Air‐stripping was used to enhance the separation. Chemiluminescence signals produced from the reaction of nitric oxide with ozone were linearly proportional to the concentration of nitrite from 10 ppb (μg as N/L) to 5 ppm (mg N/L). The relative standard deviation ( n = 5) was 0.7% at 0.1 ppm. The time elapse from starting the sample flow until the signal reached a stable level was 1.5 min.