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Collaborative Tests of Two Methods for Determining Free Silica in Airborne Dust.

PB83232322

Publication Date	1983
Personal Author	Anderson, C. C.
Page Count	172
Abstract	Two methods were collaboratively tested in 15 laboratories: XRD Method--PCAM 259, Free Silica (Quartz, Cristobalite, Tridymite) in a Airborne Dust, and IR Method--Method for Infrared Determination of Quartz in Respirable Coal mine Dust. Samples for the tests were collected from aerosols prepared in a specially adapted laboratory generation system. The methods were found to be unbiased. Both remained classified as B methods under NIOSH criterion that a B method measure within 25% of the 'true' value 95% of the time, in a single laboratory.
Keywords	Chemical analysis Silicon dioxide Air pollution Industrial hygiene Dust Coal mines Infrared spectroscopy X ray diffraction Sampling Concentration(Composition) Comparison Indoor air pollution Air pollution detection Occupational safety and health
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	68A - Air Pollution & Control 68G - Environmental Health & Safety 99A - Analytical Chemistry 57U - Public Health & Industrial Medicine
Corporate Authors	SRI International, Menlo Park, CA.; National Inst. for Occupational Safety and Health, Cincinnati, OH. Div.
Document Type	Technical Report
Title Note	Final rept. Sep 79-Feb 83.
NTIS Issue Number	198321
Contract Number	PHS-NIOSH-210-79-0059

Collaborative Tests of Two Methods for Determining Free Silica in Airborne Dust.

Collaborative Tests of Two Methods for Determining Free Silica in Airborne Dust.
PB83232322

Publication Date	1983
Personal Author	Anderson, C. C.
Page Count	172
Abstract	Two methods were collaboratively tested in 15 laboratories: XRD Method--PCAM 259, Free Silica (Quartz, Cristobalite, Tridymite) in a Airborne Dust, and IR Method--Method for Infrared Determination of Quartz in Respirable Coal mine Dust. Samples for the tests were collected from aerosols prepared in a specially adapted laboratory generation system. The methods were found to be unbiased. Both remained classified as B methods under NIOSH criterion that a B method measure within 25% of the 'true' value 95% of the time, in a single laboratory.
Keywords	Chemical analysis Silicon dioxide Air pollution Industrial hygiene Dust Coal mines Infrared spectroscopy X ray diffraction Sampling Concentration(Composition) Comparison Indoor air pollution Air pollution detection Occupational safety and health
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	68A - Air Pollution & Control 68G - Environmental Health & Safety 99A - Analytical Chemistry 57U - Public Health & Industrial Medicine
Corporate Authors	SRI International, Menlo Park, CA.; National Inst. for Occupational Safety and Health, Cincinnati, OH. Div.
Document Type	Technical Report
Title Note	Final rept. Sep 79-Feb 83.
NTIS Issue Number	198321
Contract Number	PHS-NIOSH-210-79-0059