Hollow‐fiber solvent bar microextraction with gas chromatography and electron capture detection determination of disinfection byproducts in water samples. Issue 22 (20th October 2015)

• Record Type: Journal Article
• Authors: Correa, Liliana; Fiscal, Jhon Alex; Ceballos, Sandra; de la Ossa, Alberto; Taborda, Gonzalo; Nerin, Cristina; Rosero‐Moreano, Milton
• Is Part Of: Journal of separation science. Volume 38:Issue 22(2015:Nov.)
• Page Start: 3945
• Page End: 3953
• Publication Date: 2015-10-20
• Subjects: Drinking water -- Emerging contaminants -- Hollow‐fiber solvent bar microextraction -- Liquid‐phase microextraction -- Trihalomethanes; Separation (Technology) -- Periodicals; Chromatographic analysis -- Periodicals; 543.089
• DOI: 10.1002/jssc.201500324
• Languages: English
• ISSNs: 1615-9306

Abstract

Abstract : A liquid‐phase microextraction method that uses a hollow‐fiber solvent bar microextraction technique was developed by combining gas chromatography with electron capture detection for the analysis of four trihalomethanes (chloroform, dichlorobromomethane, chlorodibromomethane, and bromoform) in drinking water. In the microextraction process, 1‐octanol was used as the solvent. The technique operates in a two‐phase mode with a 5 min extraction time, a 700 rpm stirring speed, a 30°C extraction temperature, and NaCl concentration of 20%. After microextraction, one edge of the membrane was cut, and 1 μL of solvent was collected from the membrane using a 10 μL syringe. The solvent sample was directly injected into the gas chromatograph. The analytical characteristics of the developed method were as follows: detection limits, 0.017–0.037 ng mL −1 ; linear working range, 10–900 ng mL −1 ; recovery, 74 ± 9–91 ± 2; relative standard deviation, 5.7–10.3; and enrichment factor, 330–455. A simple, fast, economic, selective, and efficient method with big possibilities for automation was developed with a potential use to apply with other matrices and analytes.