Determination of nitenpyram and 6‐chloronicotinic acid in environmental samples by ion chromatography coupled with online photochemically induced fluorescence detector

A simple, cost‐effective, sensitive, and quick method for the determination of nitenpyram and its metabolite 6‐chloronicotinic acid in environmental samples was developed by coupling an ion chromatograph with a fluorescence detector and a post‐column photochemical reactor. This developed analytical...

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Bibliographic Details
Published in:Journal of separation science 2018-11, Vol.41 (22), p.4096-4104
Main Authors: Muhammad, Nadeem, Zhang, Yun, Li, Weixia, Zhao, Yong‐Gang, Ali, Amjad, Subhani, Qamar, Mahmud, Tariq, Liu, Junwei, Cui, Hairong, Zhu, Yan
Format: Article
Language:English
Subjects:
Acetonitrile
Chromatography
Chromatography, Ion Exchange
derivitization
Environmental Monitoring
Environmental Pollutants - chemistry
Fluorescence
ion chromatography
Molecular Structure
neonicotinoids
Neonicotinoids - analysis
Nicotinic Acids - analysis
On-line systems
Photochemical Processes
post‐column
Quality control
Sodium hydroxide
Spectrometry, Fluorescence
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Summary:A simple, cost‐effective, sensitive, and quick method for the determination of nitenpyram and its metabolite 6‐chloronicotinic acid in environmental samples was developed by coupling an ion chromatograph with a fluorescence detector and a post‐column photochemical reactor. This developed analytical method involved a rapid sample extraction by modified and miniaturized quick, easy, cheap, effective, rugged, and safe method followed by isocratic ion chromatographic separation of nitenpyram and 6‐chloronicotinic acid into an IonPac™ AS11‐HC column protected by IonPac™ AG11A guard column by running 30 mM NaOH + 10% acetonitrile mobile phase. A homemade post‐column photochemical reactor was also integrated with the ion chromatographic system for online transformation of both analytes into their respective highly fluorescent photoproduct in basic media without using an extra pump. The developed method was validated by following SANTE/11945/2015 guidelines on analytical quality control and validation procedures. The method showed a good linear response (r > 0.999), improved limit of detection (0.101–0.132 μg/L), minimum or no matrix effect, excellent recoveries (90.2–100.10%) and relative standard deviations were found to be ≤6.50%.
ISSN:1615-9306
1615-9314
DOI:10.1002/jssc.201800612