prov:value
| - For example, alkaline substances (such as sodium hydroxide, potassium hydroxide, lithium hydroxide and ammonium hydroxides), acidifying agents (such as mineral acids (e.g., sulfuric acid, hydrochloric acid and phosphoric acid)), salts, such as zinc chloride, calcium carbonate, sodium carbonate, benzyltrimethylammonium sulfate, or basic organic amines, such as ethylene diamine, is added prior to ir
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