Because of Zinc oxide powder with a white, first put non-ferrous metal ions are
removed. Are not soluble in acid, potassium salt, sodium salt, ammonium salt,
nitrates are removed. You have air bubbles dissolved in acid, estimates should be
sulfate, sulfite and thiosulfate, carbonate, etc., this range is much smaller. Through
the analysis, it should be the generation of barium sulfate barium sulfate or sulfur.
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