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LABORATORY EVALUATION OF METHOD 0050 FOR HYDROGEN CHLORIDE
Citation:
Steger, J., D. Wagoner, J. Bursey, R. Merrill, R. Fuerst, AND L. Johnson. LABORATORY EVALUATION OF METHOD 0050 FOR HYDROGEN CHLORIDE. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-94/101 (NTIS PB94182227), 1994.
Description:
The EPA reference method used for collecting hydrogen chloride and chlorine in stack gas emissions is SW-846 Method 0050. n Method 0050 gaseous and particulate pollutants are withdrawn from the stack at a rate proportional to the flow rate of the gas emissions through the stack and are collected in a cyclone, on a filter, and in absorbing solutions. aboratory experiments were conducted to examine three issues concerning Method 0050: how do you handle the wet hydrogen chloride collected in the cyclone?; can this method be used to collect very low concentrations of hydrogen chloride?; can the presence of mmonium chloride in the stack emissions cause the method to have a positive or negative error? s the method requires, the cyclone is purged at the end of sampling with clean ambient air. hese studies showed that this was an effective way to transfer the residual hydrogen chloride from the cyclone to the impingers as long as no more than 25 ml of liquid was collected in the cyclone. therwise, the cyclone solution must be returned to the laboratory where further procedures must be used.At very low concentrations hydrogen chloride appears to be lost in the sampling equipment before being collected in the absorbing solutions and the loss appears to increase as the moisture content of the stack emissions increase. he presence of mmonium chloride introduces a positive error under all conditions tested.
