| Description |
The Miran 1A Portable Gas Analyzer, the H-Nu Photoinization Analyzer, Gastec No. 134 Detector Tubes, and Drager No.5/a Detector Tubes have been evaluated in the laboratory for use as sampling instruments to detect carbon tetrachloride (CCl4) and carbon disulfide (CS2) in the grain handling industry. Because of the adverse health effects associated with excess exposure to CCl4 and CS2, and the potential for worker exposure to these contaminants in the grain industry, the evaluation of a simple, accurate, and rapid method to measure the concentrations of these compounds is needed. The Gastec CCl4 detector tubes and Drager CS2 detector tubes were not accurate or precise when evaluated in this study, and any data obtained from their use in the grain handling industry where CCl4 and CS2 are present are subject to considerable error. The H-Nu Photoinization Analyzer was calibrated for CS2, when it was used to measure the concentration of CS2. When it was used to measure the concentration of CS2 in air containing both CS2 and CCl4, the results were substantially higher than would be predicted from the calibration curve. The Miran 1A was calibrated for both CCl4 and CS2. The Mirian 1A was only direct reading instrument evaluated in this study that did not have potential CCl4 and CS2 interferences. |
