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Development of Methods for the Determination of Phosphoric Acid, PCL3, PC15, and P4S10 in Air.

Authors
Goodwin-BE; Oberholtzer-JL
Source
NIOSH 1977 May:117 pages
Link
NIOSHTIC No.
00080665
Abstract
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.
Keywords
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;
CAS No.
7719-12-2; 10026-13-8; 1314-80-3; 7664-38-2; 7727-37-9; 64-17-5;
Publication Date
19770501
Funding Type
Contract;
Fiscal Year
1977
NTIS Accession No.
PB81-167694
NTIS Price
A07
Identifying No.
Contract-210-75-0038
NIOSH Division
DPSE;
Source Name
Division of Physical Sciences and Engineering, NIOSH, Cincinnati, Ohio
State
OH;
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