National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Preparation and Characterization of Analytical Reference Minerals.

PB80148612

Publication Date	1979
Personal Author	Graf, J. L.; Ase, P. K.; Draftz, R. G.
Page Count	225
Abstract	More than 100 mineral specimens of 18 types were collected and classified to provide reference materials for developing analytical methods for monitoring workplace contaminants. Mineral specimens were comprised of those frequently found in industry. The samples were pure and similar in particle size to commonly encountered industrial dusts. Reference standards included five asbestos (1332214) minerals in fibrous and nonfibrous varieties, three silica polymorphs, (7631869) several minerals used as internal standards in current methods for analyzing silica polymorphs, and talc (14807966). Several specimens of each mineral were subjected to multilevel screening to select appropriate specimens for processing as final mineral standards. Screening included macroscopic evaluation, polarized light microscopy (PLM), X ray diffraction (XRD) and differential thermal analysis (DTA). When the optimum grinding and beneficiation procedure for each mineral sample had been determined, the best of each type was purified and ground. Final reference materials were again subjected to PLM, XRD, and DTA. Particle size distribution of the final products were monitored.
Keywords	Standards Contaminants Minerals Industrial atmospheres Dust Air pollution Particle size Industrial hygiene Reference materials Occupational safety and health
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	94H - Industrial Safety Engineering 57U - Public Health & Industrial Medicine 94D - Job Environment 68G - Environmental Health & Safety
Corporate Authors	IIT Research Inst., Chicago, IL.; National Inst. for Occupational Safety and Health, Cincinnati, OH.
Document Type	Technical Report
Title Note	Technical rept.
NTIS Issue Number	198012
Contract Number	PHS-210-75-0043

Preparation and Characterization of Analytical Reference Minerals.

Preparation and Characterization of Analytical Reference Minerals.
PB80148612

Publication Date	1979
Personal Author	Graf, J. L.; Ase, P. K.; Draftz, R. G.
Page Count	225
Abstract	More than 100 mineral specimens of 18 types were collected and classified to provide reference materials for developing analytical methods for monitoring workplace contaminants. Mineral specimens were comprised of those frequently found in industry. The samples were pure and similar in particle size to commonly encountered industrial dusts. Reference standards included five asbestos (1332214) minerals in fibrous and nonfibrous varieties, three silica polymorphs, (7631869) several minerals used as internal standards in current methods for analyzing silica polymorphs, and talc (14807966). Several specimens of each mineral were subjected to multilevel screening to select appropriate specimens for processing as final mineral standards. Screening included macroscopic evaluation, polarized light microscopy (PLM), X ray diffraction (XRD) and differential thermal analysis (DTA). When the optimum grinding and beneficiation procedure for each mineral sample had been determined, the best of each type was purified and ground. Final reference materials were again subjected to PLM, XRD, and DTA. Particle size distribution of the final products were monitored.
Keywords	Standards Contaminants Minerals Industrial atmospheres Dust Air pollution Particle size Industrial hygiene Reference materials Occupational safety and health
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	94H - Industrial Safety Engineering 57U - Public Health & Industrial Medicine 94D - Job Environment 68G - Environmental Health & Safety
Corporate Authors	IIT Research Inst., Chicago, IL.; National Inst. for Occupational Safety and Health, Cincinnati, OH.
Document Type	Technical Report
Title Note	Technical rept.
NTIS Issue Number	198012
Contract Number	PHS-210-75-0043