Determination of Benzene and its Derivatives in Water with the Agilent Headspace Sampler and 8890 GC

New Organic Monitoring Techniques
Poster Presentation

Prepared by y. zhang
Agilent, 412 Yinlun Road, Shanghai, Shanghai, 200000, China


Contact Information: youjuan_zhang@agilent.com; 021-20209123


ABSTRACT

The analysis of benzene and its derivatives in environmental water samples usually proceeds by either headspace or purge and trap methods. This is typically accompanied by separation by gas chromatography (GC) and detection by a flame ionization detector (FID) or a mass spectrometric detector (MSD). Both ISO 11423-1 and HJ 1067 methods describe a headspace method of sample treatment for the determination of benzene and some of its derivatives in homogeneous samples of water and wastewater via GC. EPA 5021 is a general purpose method for the analysis of volatile organic compounds (VOCs) in water, soil and solid waste matrices.

This paper demonstrates that the Agilent headspace sampler, coupled with the Agilent 8890 GC, delivers accurate and reliable analysis of benzene and certain derivatives in water. This system can easily achieve the performance specification for the compounds in the methods mentioned above. The calibration curves were determined for those target compounds and the correlation coefficients were well above 0.999. The relative standard deviation (RSD) was determined for each compound. The area %RSD was 1.3% – 2.4% and the retention time %RSD was less than 0.045%. For all the compounds, the MDLs were ≤0.2 µg/L. Satisfactory recoveries were achieved at around 99.1% to 101.7%.