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Optimization of the headspace solid-phase microextraction for determination of glycol ethers by orthogonal array
Ching-Te Huang1, Yang-Yao Su, You-Zung Hsieh
1Department of Applied Chemistry, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu 308, Taiwan.
Journal of Chromatography. A
|November 29, 2002
Summary
This study introduces a sensitive method using headspace solid-phase microextraction (HS-SPME) and gas chromatography to detect glycol ethers in water, blood, and urine. The optimized technique achieves low detection limits for environmental and biological sample analysis.
Area of Science:
- Analytical Chemistry
- Environmental Science
- Toxicology
Background:
- Glycol ethers are widely used industrial solvents.
- Concerns exist regarding their potential health and environmental impacts.
- Sensitive analytical methods are needed for their detection in various matrices.
Purpose of the Study:
- To develop and optimize a headspace solid-phase microextraction (HS-SPME) method.
- To determine six common glycol ethers at microgram per liter levels.
- To validate the method for analyzing glycol ethers in aqueous, urine, and blood samples.
Main Methods:
- Utilized a 75 microm Carboxen-polydimethylsiloxane fiber for HS-SPME.
- Employed gas chromatography-flame ionization detection (GC-FID) for quantification.
- Optimized experimental parameters (temperature, time, salt, volume) using orthogonal array designs.
Main Results:
- Achieved high reproducibility with relative standard deviations from 1.48% to 7.59%.
- Demonstrated excellent linearity with correlation coefficients > 0.998 over two orders of magnitude.
- Established method detection limits as low as 0.26 microg/l in deionized water and 1.74 microg/l in biological samples.
Conclusions:
- The optimized HS-SPME-GC-FID method is highly sensitive and reproducible.
- The method is suitable for the reliable quantification of glycol ethers in diverse sample types.
- This analytical approach aids in monitoring glycol ether exposure and environmental contamination.