Apex2 with a Constant Pressure Controller and Low Flow Adaptor. Generally the flow is lower (typically 20-100ml/min) and so either a dedicated low flow pump may be used or a medium flow pump, i.e. The ends of the sorbent tube are broken off and inserted into a tube holder which is then connected to a personal sampling pump. Solvents, gases and vapours are sampled actively in a similar way to particulates but instead of filter and head, a sorbent tube is used or sometimes a bubbler/impinger.Ībove is a typical sample train using a sorbent tube. Please consult your standard method or the Hazard Search to find out what equipment you need. These are sealed badges which are opened for sampling, worn on the person for the recommended time, sealed and sent off for analysis. It is also possible to measure background exposure via Diffusive or Passive sampling. A typical sampling train for personal monitoring would look like this with the sampler mounted in the breathing zone įor grab samples of gases, a gas sampling bag is used, e.g. For particulates and fumes it would be a filter paper or suitable solid media and for gases and vapours through a sorbent tube or sometimes an impinger/bubbler. In general terms we draw a known volume of air using a sampling pump through a suitable sampling medium. Inhalation is usually the most significant route of entry into the body and so monitoring the air they breathe is vitally important. Many industrial and construction sites have the potential to expose their staff to harmful dust or vapours and gases.
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