This standard specifies the pumpless sampler sampling and solvent desorption gas chromatography methods for the determination of the time-weighted average concentration (TWA) of xylene in the air at workplaces. This standard applies to the determination of the time-weighted average concentration of xylene in the air in workplaces.
WS/T 153-1999 history
1999WS/T 153-1999 Workplace air.Determination of dimethyl benzene.Passive sampling gas chromatographic method
WS/T 153-1999 Workplace air.Determination of dimethyl benzene.Passive sampling gas chromatographic method was changed to GBZ/T 160.42-2004 Methods for determination of aromatic hydrocarbons in the air of workplace.