Mercury-free test cells

Generally, the brine is free of mercury in new membrane-cell installations. However, if a mercury plant is converted to membrane technology, it is very likely that the brine will be contaminated with mercury. Laboratory tests have shown that the concentration of mercury in the catholyte will be about 1,000-fold lower than the concentration in the anolyte, and it is usually considered that lOppb Hg in the catholyte has no short-term effect on voltage. 

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