A vortex-assisted liquid–liquid microextraction (VALLME) method using isooctanol as extractant followed by spectrophotometry was developed for the extraction and determination of trace nitrite in water samples. The method is based on selective ion-pairing complex (I3− MG+) formation of triiodideanion I3− with cationic dye malachite green (MG) at pH 3.0, and its subsequent extraction in an organic solvent. The extracted organic solvent-rich phase is diluted with methanol, and its absorbance is measured against an analyte blank at 630 nm. The variables affecting VALLME efficiency were investigated, and a set of optimized conditions was obtained. Under the optimum conditions, the linear range of nitrite was from 1.0 to 100 ng mL−1. The relative standard deviations (n = 10) were 2.1–3.9% and the limit of detection was 0.5 ng mL−1 and was successfully applied to the determination of nitrite in environmental water.
Skip Nav Destination
Article navigation
Research Article|
February 24 2017
Vortex-assisted liquid–liquid microextraction combined with spectrophotometry for the determination of trace nitrite in water samples Available to Purchase
Yang Jiao;
Yang Jiao
1Faculty of Yunnan Jianniu Bio Technology Co., Ltd, Kunming 650033, China
Search for other works by this author on:
Jianping Yu;
Jianping Yu
2Fumin Environmental Monitoring Station, Fumin Environmental Protection Agency, Kunming, Yunnan Province 650400, China
Search for other works by this author on:
Yaling Yang
3Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan Province 650500, China
E-mail: [email protected]
Search for other works by this author on:
Water Supply (2017) 17 (5): 1225–1231.
Article history
Received:
May 24 2016
Accepted:
January 09 2017
Citation
Yang Jiao, Jianping Yu, Yaling Yang; Vortex-assisted liquid–liquid microextraction combined with spectrophotometry for the determination of trace nitrite in water samples. Water Supply 1 October 2017; 17 (5): 1225–1231. doi: https://doi.org/10.2166/ws.2017.010
Download citation file:
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Could not validate captcha. Please try again.
eBook
Pay-Per-View Access
$38.00