Abstract
Abstract Recently National Emission Standards Regulations were promulgated for mercury from chlor-alkali plants in Canada using the mercury cell process. The amount of mercury emitted to the ambient air can be measured by the Standard Reference Methods for Source Testing: Measurement of Emissions pf Mercury from Mercury Cell Chlor-Alkali Plants. This paper presents data accumulated during the development of the sample collection and analysis methods described in the above publication. The accuracy of the combined collection and analysis methods is estimated to be ±5%. The sensitivity of the method is estimated to be 10 ng of mercury in the flameless atomic absorption analysis system. Levels of mercury as low as 1 μg/m3 are detected. The method is specific for mercury in its elemental and inorganic forms in the gaseous process streams described in the standard reference method. Organic mercury compounds were not considered to be emitted by the chlor-alkali industry. The precision of sample analysis was estimated to be ±1.6%.
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