ABSTRACT
The high-volume sampler is used primarily to provide samples of particulate matter for laboratory analysis for metals, organic particles, and sulfate and nitrate compounds. High-volume samplers, PM10 samplers, dichotomous samplers, polyurethane foam samplers, industrial hygiene personal samplers, and asbestos samplers all employ filtration sampling and require flow monitoring and sampler air volume measurement. This chapter discusses the high-volume sampling and modem adaptations in detail. It reviews the basic applications of filtration theory to particulate air sampling. The chapter provides specific details on flow calibration techniques. As with personal gaseous pollutant samplers, flow rate calibration for particle sampling systems is often done by means of bubble meters or mass flow meters. The flow controllers are often employed on high-volume samplers to keep the sampling rate constant. Once a flow-controlled sampler has been shown to operate reliably, the only calibration required is a simple one-point check with an orifice transfer standard to ensure that the flow rate is unchanged.
