Transcription of (ATOMIC ABSORPTION) Method Number: ID-121 OSHA …
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METAL & METALLOID PARTICULATES IN WORKPLACE ATMOSPHERES (ATOMIC ABSORPTION) Method Number: ID-121 Matrix: Air, Wipes, or Bulks OSHA Permissible Exposure Limits: See Table 1 Collection Procedure: Personal air samples are collected on mixed-cellulose ester filters using a calibrated sampling pump. wipe or bulk samples are collected using grab sampling techniques. Recommended Sampling Rate: 2 L/min Recommended Air Volumes Time Weighted Average Samples: 480 to 960 L Short-Term Exposure Limit Samples: 30 L Ceiling Samples: 10 L* Analytical Procedure: Samples are desorbed or digested using water extractions or mineral acid digestions.
Depending on advances in technology or changes in exposure limits, substances may be added or deleted from the above lists. 1.1 History Air and wipe samples containing metal and metalloid particulate have always been analyzed at the OSHA Salt Lake City Analytical Laboratory using atomic absorption or emission spectrometry (8.1).
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