title: [Determination of trace carbaryl and carbofuran in water by online column enrichment-ultra high performance liquid chromatography].
abstract: An online column enrichment-ultra high performance liquid chromatography (UHPLC) method was developed to determine trace carbaryl and carbofuran in water. The sample was injected into a UHPLC system directly after filtration with 0.22 microm membrane, and then enriched by online solid phase extraction (SPE) column. The analyte was back-flushed into the analytical column Acclaim RSLC C18 (100 mm x 2.1 mm, 2.2 microm) by valve switching method. The mobile phases were 10 mmol/L ammonium acetate buffer (pH 5.0, adjusted by acetic acid) and acetonitrile in a gradient elution mode with a flow rate of 0.8 mL/min, and detected by a diode array detector with the detection wavelength of 280 nm. The good linear ranges of carbaryl and carbofuran were 1.0 - 100 microg/L with the correlation coefficients (r2) larger than 0.9999, and the limits of detection (S/N = 3) were 0.5 microg/L and 0.25 microg/L, respectively. The average spiked recoveries were in the range of 76.0% - 120.0%. The method has been applied to determine trace carbaryl and carbofuran in water samples with satisfactory results.
authors.affiliation: Taizhou Hospital of Integrated Traditional and Western Medicine (Zeguo District), Wenling 317523, China.
authors.forename: Enzhi
authors.initials: E
authors.lastname: Wang
authors.forename: Xinlei
authors.initials: X
authors.lastname: Yang
authors.forename: Mingli
authors.initials: M
authors.lastname: Ye
authors.forename: Qiong
authors.initials: Q
authors.lastname: Wang
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Cai
mesh_terms: D012721:Carbaryl / Q000032:analysis*; D002235:Carbofuran / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D007306:Insecticides / Q000032:analysis; D052616:Solid Phase Extraction / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D007306:Insecticides; D014874:Water Pollutants, Chemical; D012721:Carbaryl; D002235:Carbofuran