NIOSH Analytical Method, Sulfur Dioxide, S308, (Set 3).
NIOSH 1977 Nov:7 pages
The method is described for determining sulfur-dioxide (7446095) in the air, including the principle, range and sensitivity, interferences, precision and accuracy, advantages and disadvantages, apparatus, reagents, calibration and standards, and calculations. The principle is based upon a yellow or yellow-orange to pink color change in the sample obtained from a midget bubbler containing hydrogen-peroxide after isopropyl-alcohol is added, pH adjusted and titrated with barium-perchlorate using Thorin as the indicator. The range is 6.6-26.8 milligrams per cubic meter with a precision of milligrams per cubic meter.
NIOSH-Author; NIOSH-Analytical-Method; Standards-Completion-Program; SCP; Analytical-Method; Standards; Sampling; Set-3; Air-quality-measurement; Air-sampling; Procedures; Oxides; Sulfur-compounds; Colorimetry; Exposure-limits;
Division of Physical Sciences and Engineering, NIOSH, Cincinnati, Ohio, 7 pages, 3 references