Precipitation by oxalate is the primary method to produce rare earth oxides. 稀土草酸盐沉淀法是制备稀土氧化物的主要方法。
The optimum method for purifying Konjac glucomannan is found through comparative study of various methods. 对不同方法纯化魔芋葡甘露聚糖进行了研究,酶法结合乙醇沉淀法是最佳提纯魔芋葡甘露聚糖的方法。