Silver in the form of silver sulphide was recovered from waste fixing solution with sodium sulphide.

用硫化钠从废定影液中以硫化银的形式回收银,高温灼烧硫化银得纯银,再制备成硝酸银.

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Meanwhile, we also provide you trisodium phosphate, alkali protease , Sodium carbonate , sodium sulphide and bicarbonate, etc.

本公司同时经营磷酸三钠 、 碱性蛋白酶 、 硫化碱 、 纯碱、小苏打等化工产品.

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