General Questions about Sampling

Can the representative sample media used for calibration be used more than once?

Yes. Most users keep on-hand sorbent tubes and filters of various types labeled "calibration unit." They use them for months.…

Yes. Most users keep on-hand sorbent tubes and filters of various types labeled "calibration unit." They use them for months. Calibration media is only used to mimic the back pressure of the collection media.

Can I get a MSDS on specific materials?

SKC has all necessary MSDSs on file. Note that sorbent tubes and detector tubes are exempt from OSHA requirements for…

SKC has all necessary MSDSs on file. Note that sorbent tubes and detector tubes are exempt from OSHA requirements for MSDSs because they are considered an "article". Exemption letters are also on file.

What is the action level?

The action level is typically one-half the permissible exposure level. When exposures reach or exceed the action level, additional requirements…

The action level is typically one-half the permissible exposure level. When exposures reach or exceed the action level, additional requirements apply, including medical surveillance, air monitoring, etc. Simply put, it is the concentration must take some action.

What is the difference between respirable and total dust sampling?

Total dust sampling, in the traditional usage, refers to all dust particles that can be effectively collected using a filter…

Total dust sampling, in the traditional usage, refers to all dust particles that can be effectively collected using a filter cassette. Respirable dust refers to those dust particles small enough in size to get through the protective mechanisms of the nose upper airways and reach the gas exchange region of the lung (see diagram below). Respirable dust is collected using a cyclone. Some chemicals have total dust standards and some have both, depending on their potential health effects. 

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