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with deionized water, and twice with methanol. the solution should be made just prior to use and disposed of as soon as possible. item # , filter , can be used to simulate laboratory conditions in tanks which are deemed borderline. normally, one paper is used on each bulkhead, placed in a jar (using plastic
therefore, if the standard fades at less time than you are testing for, it is an indication of a problem with either the lab. methanol, the permanganate solution, or the testing containers. under the purest conditions, the permanganate time test will run minutes. wall wash procedure suggest using a plastic...
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