Abstract
A method is described for the routine determination of mercury in the process and product streams of chlor alkali electrolysis plants (with the exception of chlorine) and also in the plant waste waters. The procedure is based on flameless atomic absorption spectrophotometry. Results for interlaboratory trials involving up to 37 participating laboratories are presented. Both synthetic and technical samples were analysed with mercury contents varying between 20 μg kg -1 and 20 mg kg -1. Statistical evaluation of the results gave a value of from 4 to 8% for the repeatability and from 6 to 22% for the reproducibility.
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