Sensitive determination of chloroanilines in water samples by hollow fiber‐based liquid‐phase microextraction prior to capillary electrophoresis with amperometric detection

Abstract

A hollow fiber-based liquid-phase microextraction method has been developed for enrichment of trace chloroanilines in water samples. Target analytes including aniline, three mono-chlorinated aniline isomers (o-chloroaniline, m-chloroaniline, and p-chloroaniline) and four mono-chlorinated methylaniline isomers (2-chloro-4-methylaniline, 3-chloro-4-methylaniline, 4-chloro-2-methylaniline, and 5-chloro-2-methylaniline) were determined by CE with amperometric detection after microextraction. Several factors that affect separation, detection, and extraction efficiency were investigated. Under the optimum conditions, eight aniline compounds could be well separated from other components coexisting in water samples within 25 min, exhibiting a linear calibration over three orders of magnitude (r > 0.998); the obtained enrichment factors were between 51 and 239, and the LODs were in the range of 0.01-0.1 ng/mL. The proposed method has been applied for the analyses of real environmental water and sewage samples with relative recoveries in the range of 83-108%.

Detection of contaminants in water supply: A review on state-of-the-art monitoring technologies and their applications

“…Analysis on trace chloroanilines in water samples was developed by Pan et al [189] using CE technique and the method could achieve LOD between 0.01 and 0.1 ng/L for eight aniline compounds within 25 min of detection. Under the optimum conditions, the enrichment factors were obtained within the range of 51-239 and exhibited linear calibration over three orders of magnitude (r > 0.998).…”

Sensitive Determination of Bromate in Water Samples by Capillary Electrophoresis Coupled with Electromembrane Extraction

“…The hollow fiber was cut into segments with a length of 5 cm, and the preparation of hollow-fiber unit was referred in our previous work (Pan et al 2013).…”

Determination of trace amounts of aromatic amines after magnetic solid‐phase extraction using silver‐modified Fe3O4/graphene nanocomposite

“…HAs such as 2,4-dichloroaniline (2,4-DCA), 3,4-dichloroaniline (3,, and 4-bromoaniline (4-BA) and NAs such as 2nitroaniline (2-NA), 3-nitroaniline (3-NA), and 4-nitroaniline can also be found as degradation products and intermediates of various phenylurea and phenylcarbamate pesticides [1,3,4]. They are released into the environment as chemical residues of dyestuff, pharmaceutical, and rubber manufacturing, and as by-products of coal-conversion waste processing [5][6][7].…”