Weigh sample sulfate 0.2 g, put in a beaker size 250
dissolved. Boil and add hot hydrochloric 1% barium chloride 30 hard cover glass beaker with clock. Boil the digested sludge and about 5 minutes
.When the cold solution to filter the filter paper. Wash sediments, folded filter paper with sediment in the cup tile
andheat at 80 degrees for a long time. 5 minutes weighing the fall of water sediment barium sulfate The result went to calculate quantity of sulfate in the sample.
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