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Mercury

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Evaluation

Mercury and its compounds exist in three general forms:

  • Elemental (or metallic).

  • Inorganic. Mercury can combine with other elements (mainly chlorine, sulfur, and oxygen) to form inorganic mercury compounds.

  • Organic. Mercury may combine with carbon or carbon-containing substances to make organic mercury compounds. These organic compounds are further divided between alkyl (carbon-chain) and aryl (aromatic ring) groups.

The respective methods for sampling the different forms of mercury are:

Elemental
  • Chemical Sampling Information. OSHA. Presents in concise form, data on a large number of chemical substances that may be encountered in industrial hygiene investigations. Acts as a basic reference for industrial hygienists engaged in OSHA field activity.
  • Mercury Vapor in Workplace Atmospheres. OSHA Method ID-140, (June 1991). Describes the collection of airborne elemental mercury in a passive dosimeter or active sampling device and subsequent analysis using a cold vapor-atomic absorption spectrophotometer.
  • Particulate Mercury in Workplace Atmospheres. OSHA Method ID-145, (December 1989). Describes the collection of airborne particulate mercury on 0.8-µm mixed-cellulose ester membrane filters and the subsequent analysis using a cold vapor-atomic absorption spectrophotometer.
  • Mercury. National Institute for Occupational Safety and Health (NIOSH) Manual of Analytical Methods (NMAM) Method 6009, (August 15, 1994). Describes the elemental mercury vapor sampling and measurement.
Aryl and Inorganic
Organomercury (Alkyl Compounds)
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