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9-4青铜中含铝8～10%,含铁2～4%。试样用盐酸—过氧化氢溶解后,用锌将铜从溶液中置换出来。铁被还原为二价,用重铬酸钾容量法测出。铝在PH5.5～6用EDTA-NaF络合滴定法测出。本
9-4 bronze contains 8 to 10% aluminum and 2 to 4% iron. After the sample is dissolved in hydrochloric acid-hydrogen peroxide, the copper is replaced with copper from the solution. Iron is reduced to divalent, measured by potassium dichromate capacity method. Aluminum was measured by EDTA-NaF complexometric titration at pH 5.5-6. this