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Complexometric Analysis Of Lead And Inc Ore

In weak ammonia solutionsodium sulfide and cupral reacted with copperleadincironcobaltnickelmanganesechromiumcadmium and bismuth to form a sulfide precipitatie and a cupral complex inner salt precipitaterealiing the separation of calcium and magnesium.Thentrace manganese was reduced to low valency by hydroxylamine hydrochloride to

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