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Determination of benzene, toluene, ethylbenzene and o-xylene in bottled waters by headspace solid-phase microextraction and gas chromatography/mass spectrometry
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2011, v.24 no.2, pp.119-126
https://doi.org/10.5806/AST.2011.24.2.119
(2011). Determination of benzene, toluene, ethylbenzene and o-xylene in bottled waters by headspace solid-phase microextraction and gas chromatography/mass spectrometry. Analytical Science and Technology, 24(2), 119-126, https://doi.org/10.5806/AST.2011.24.2.119
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Abstract
The amount of benzene, toluene, ethylbenzene, and o-xylene (BTEX) in 30 kinds of bottled waters purchased from market and 9 kinds of tap waters from home were determined using headspace solid phase microextraction (HS-SPME). The sample was stirred at 1200 RPM G for 4 min using a magnetic bar with 100μm PDMS as adsorbent for BTEX. Then it was desorbed from the fiber for 1 min at room temperature. Quantitation was achieved using standard calibration method. The limit of detection was determined as benzene 0.39 (±0.04)ng/mL, toluene 0.08 (±0.04) ng/mL, ethylbenzene 0.04 (±0.01) ng/mL, and o-xylene 0.05 (±0.02) ng/mL. Benzene and o-xylene were not detected in any samples, but toluene was detected in 11 samples, and ethylbenzene was detected just in 3 samples among 30 investigated bottled waters. The concentration range of investigated materials for toluene and o-xylene were 0.24 (±0.09)~2.95 (±0.08) ng/mL, 0.08 (±0.06)~0.93 (±0.10) ng/mL, respectively.
- keywords
- BTEX, bottled water, tap water, GC/MS, SPME
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