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Citation: Shi Xiangyang, Wang Shuhu, Ma Wanyun, Chen Dieyan. Determination of Monocyclic Aromatic Hydrocarbons in the Groundwater by Micellar Electrokinetic Capillary Chromatography[J]. Chinese Journal of Applied Chemistry, ;1999, 16(5): 85-87. shu

Determination of Monocyclic Aromatic Hydrocarbons in the Groundwater by Micellar Electrokinetic Capillary Chromatography

1.
Center of Atomic and Molecular Sciences, Department of Modern Applied Physics, Tsinghua University, Beijing 100084

Received Date: 30 December 1998
Available Online: 31 May 1999
Fund Project: 国家海洋863项目资助课题(863-820-03-探1) (863-820-03-探1)

A micellar electrokinetic capillary chromatographic method was used for quantitative determination of benzene, toluene and xylene in the groundwater at different depth. A fused silica capillary of 57 cm×50 μm(50 cm to detector) was used. Running buffer was a 2.0 mmol/L aqueous tetraborate solution containing 50 mmol/L sodium dodecyl sulfate(pH 9 16) and 20% methanol as an organic modifier. The voltage used was 25 kV. Detection wavelength was 200 nm. Benzene, toluene and xylene were separated well within 20 min. The calibration curves were linear over 4.3~52.8 mg/L. The minimum detectable concentrations were 2.3, 1.3 and 0.8 mg/L for three compounds respectively. The determination results showed that at the same well benzene concentration increased linearly with the increase of the well depth.
- micellar electrokinetic capillary chromatography,
- benzene,
- toluene,
- xylene,
- environmental analysis
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