EN 14662-2:2005 Ambient air quality - Standard method for measurement of benzene concentrations - Part 2: Pumped sampling followed by solvent desorption and gas chromatography
This part of EN 14662 is in accordance withThe generic methodology forThe determination of benzene in ambient air [1] forThe purpose of comparison of measurement results with limit values with a one-year reference period.This part of EN 14662 gives general guidance forThe sampling and analysis of benzene in air by pumped sampling, solvent desorption and capillary gas chromatography.This part of EN 14662 is valid forThe measurement of benzene in a concentration range of approximately 0,5 μg/m3 to 50 μg/m3 in an air sample of 1 m3 volume, typically collected over a period of 24 hours.The upper limit of the useful range is set byThe sorptive capacity of the sorbent and byThe linear dynamic range of the gas chromatograph column and detector or byThe sample splitting capability of the analytical instrumentation used.The lower limit of the useful range depends onThe noise level of the detector and on blank levels of benzene and/or interfering artefacts onThe sorbent and inThe desorption solvent.The method described here is based on sampling on sample tubes typically containing 100 mg of activated charcoal and desorption using carbon disulphide. Alternative sorbents to activated charcoal may be used provided thatThe equivalence in performance characteristics of the procedure is demonstrated. Alternative desorption solvents to carbon disulphide may be used provided thatThe equivalence in performance characteristics of the procedure is demonstrated.
EN 14662-2:2005 history
2005EN 14662-2:2005 Ambient air quality - Standard method for measurement of benzene concentrations - Part 2: Pumped sampling followed by solvent desorption and gas chromatography