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Development of Methods for the Determination of Phosphoric Acid, PCL3, PC15, and P4S10 in Air.
NIOSH 1977 May:117 pages
A program of laboratory studies was carried out to develop methods for collecting an analyzing samples of phosphorus-trichloride (7719122), phosphorus-pentachloride (10026138), phosphorus- pentasulfide (1314803), and phosphoric-acid (7664382) for workplace atmospheres at concentrations in the vicinity of the OSHA standard. 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 (7727379) containing PCl3, PCl5, and P4S10 at concentrations in the vicinity of their OSHA standard levels were developed and tested to challenge prototype collection devices. Classical wet chemical methods based on the phosphomolybdate colorimetric method for orthophosphate were developed and tested for each of those three analytes to serve as independent means of determining the generator concentrations and as backup methods of analysis for actual samples. Because the phosphorus halides, PC13 in particular, were very reactive with atmospheric moisture and the 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 (64175), respectively, were also developed.
NIOSH-Contract; Contract-210-75-0038; Sampling; Air-sampling; Chlorides; Sulfides; Inorganic-acids; Phosphorus-compounds; Sampling-methods; Analytical-methods; Chemical-analysis; Data-collection; Data-analysis;
7719-12-2; 10026-13-8; 1314-80-3; 7664-38-2; 7727-37-9; 64-17-5;
NTIS Accession No.
Division of Physical Sciences and Engineering, NIOSH, Cincinnati, Ohio
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division