Determination of haloacetic acids in swimming pool waters by membrane-protected micro-solid phase extraction.
In this study, a simple and efficient extraction method for determining haloacetic acids (HAAs) in swimming pool waters has been developed. HAAs are toxic organic pollutants of disinfection origin most commonly detected in swimming pool and drinking waters at trace level concentrations. For the first time, a highly efficient sorbent was developed using rice husk and used for micro-solid phase extraction (μ-SPE) technique. To increase the extraction capability of rice husk silica, iron oxide was incorporated via sol-gel process. In μ-SPE device, the novel sorbent was packed and used for extraction of HAAs prior to analysis using ultra performance liquid chromatography-ultraviolet detection (UPLC-UV). Various extraction parameters were optimized to improve the extraction efficiency of μ-SPE. Under optimum conditions, linearity (coefficient of determination, r(2)≥0.991 over the concentration range of 1-150 μg/L), detection limits in the range of 0.001-0.092 μg/L, mean recoveries up to 110% with corresponding relative standard deviations of 2-7% (n=3) had been obtained. Finally, the method was applied to swimming pool water to evaluate its feasibility. The mean concentrations for HAAs from the pool waters were in the range of 6.8 and 48.6 μg/L which are far below the standard values set by United States Environmental Protection Agency.
Department of Chemistry, King Fahd University of Petroleum and Minerals, KFUPM, P.O. Box 1509, Dhahran 31261, Saudi Arabia.
Hakimu
H
Nsubuga
Chanbasha
C
Basheer
D062845:Chloroacetates / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D002851:Chromatography, High Pressure Liquid; D006863:Hydrogen-Ion Concentration; D057230:Limit of Detection; D012275:Oryza / Q000737:chemistry; D009994:Osmolar Concentration; D015203:Reproducibility of Results; D012822:Silicon Dioxide / Q000737:chemistry; D052617:Solid Phase Microextraction / Q000295:instrumentation / Q000379:methods*; D013551:Swimming Pools; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification
D062845:Chloroacetates; D014874:Water Pollutants, Chemical; D012822:Silicon Dioxide
Haloacetic acids; Micro-solid phase extraction; Porous silica incorporated Fe; Rice Husk; Sol–gel coatings; Ultra performance liquid chromatography