期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1217, 期 23, 页码 3707-3710出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2010.03.044
关键词
Triazinic metabolites; Stir bar sorptive extraction; Novel polymeric phases; Polyurethane foams
资金
- Fundacao para a Ciencia e a Tecnologia [BD/24598/2005, BPD/26559/2006]
Polyurethane (PU) foams were applied for stir bar sorptive extraction of five triazinic metabolites (desethyl-2-hydroxyatrazine, desisopropylatrazine, desethylatrazine, 2-hydroxyatrazine and desethyl-terbuthylazine) in water matrices, followed by liquid desorption and high performance liquid chromatography with diode array detection (SBSE(PU)-LD/HPLC-DAD). The optimum conditions for SBSE(PU)-LD were 5h of extraction (1000 rpm) and 5% (v/v) of methanol for the analysis of desethyl-2-hydroxyatrazine and 2-hydroxyatrazine, 15% (w/v) of sodium chloride for the remaining compounds and acetonitrile as back-extraction solvent (5 mL) under ultrasonic treatment (60 min). The methodology provided recoveries up to 26.3%, remarkable precision (RSD < 2.4%), excellent linear dynamic ranges between 5.0 and 122.1 mu g/L (r(2) > 0.9993) and convenient detection limits (0.4-1.3 mu g/L). The proposed method was applied in the analysis of triazinic metabolites in tap, river and ground waters, with remarkable performance and negligible matrix effects. The comparison of the recoveries obtained by PU and commercial stir bars was also performed, where the yields achieved with the former were up to ten times higher proving that PU is appropriate for analysis at trace level of this type of polar compounds in water matrices. (C) 2010 Elsevier B.V. All rights reserved.
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