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mættet natriumsulfidopløsning p.a .
saturated solution of sodium sulphide a . r .

der kan anvendes ca. 50 mg edta i stedet for natriumsulfidopløsning.
approximately 50 mg edta can be used instead of sodium sulphide solution.

ved anvendelse af en kviksølvkatalysator tilsættes der i destillationskolben yderligere 10 ml natriumsulfidopløsning ( 3.11 ) eller 25 ml natriumtiosulfatopløsning ( 3.12 ) .
if a mercury-based catalyst has been used, also add either 10 ml of sodium sulphide solution ( 3.11 ), or 25 ml of sodium thiosulphate solution ( 3.12 ) .

natriumsulfidopløsning, c = 0,5 mol/liter i glycerol, β = 120 g/liter (for x = 9) (se bemærkning 7.8).
sodium sulphide solution, c = 0,5 mol/l in glycerol, ß = 120 g/l (for x = 9) (see 7.8 observations)