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一磷沉淀剂的配制溶液(1):溶解70克钼酸钠于150毫升水中溶液(2):溶解60克柠檬酸于80毫升硝酸和150毫升水的混合液中溶液(3):在不断搅拌下,缓慢地将溶液(1)加到溶液(2)中溶液(4):溶解5毫升喹啉于30毫升硝酸和100毫升水的混合液中缓慢地将溶液(4)加到溶液(3)中,用水稀释至1升。放置24小时,如有混浊过滤,贮存于低温暗处。二磷铁的测定称取试样0.1克,置于盛有3克过氧化钠的镍坩
Preparation of a phosphorus precipitation agent solution (1): Dissolve 70 grams of sodium molybdate in 150 ml of water Solution (2): Dissolve 60 grams of citric acid in a mixture of 80 ml of nitric acid and 150 ml of water Solution (3) Slowly add solution (1) to solution (2) Solution (4): Dissolve 5 ml of quinoline Slowly add solution (4) to the solution (30 ml) in a mixture of 30 ml of nitric acid and 100 ml of water 3), dilute with water to 1 liter. After 24 hours, if turbid filter, stored in low temperature dark place. Determination of iron phosphate Weigh the sample 0.1 grams, placed in 3 grams of sodium peroxide containing nickel crucible