Development of Methods for the Determination of Phosphoric Acid PCl3, PCl5, P4, S10, In Air.
Goodwin-BE; Harris-JL; Oberholtzer-JE
Arthur D. Little, Inc. 1977 May:127 pages
Methods were developed for collecting and analyzing samples of phosphorus-trichloride (7719122) (PCl3), phosphorus-pentachloride (10026138) (PCl5), phosphorus-pentasulfide (1314803) (P4S10), and phosphoric-acid (7664382) (H3P04) from workplace atmospheres at concentrations close to applicable OSHA standards. The feasibility of reacting the analytes with organic reagents to produce stable derivatives which could be analyzed by gas chromatography was assessed. Techniques for generating atmospheres of air or nitrogen containing PCl3, PCl5, and P4S10 at concentrations close to OSHA standards were developed and tested. Classical wet chemical methods based on the phosphomolybdate colorimetric method for orthophosphate were developed and tested for each of the phosphorus analytes. Because the phosphorus halides were very reactive with atmospheric moisture and components of sampling devices, tentative methods were developed based on collection in water followed by colorimetric analysis. Tentative gas chromatographic methods for H3P04 and P4S10 based on reaction with a silylating agent and ethanol, respectively, were also developed.
NIOSH-Contract; Contract-210-75-0038; Sampling-methods; Air-sampling; Workplace-studies; Air-contamination; Analytical-methods; Chemical-analysis; Analytical-instruments;
7719-12-2; 10026-13-8; 1314-80-3; 7664-38-2;
Department of Health, Education and Welfare Center for Disease Control National Institute for Occupational Safety and Health, d-210-75-0038
Arthur D. Little, Inc. Cambridge, MA 02140