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研究了用离子交换树脂相比色法测定微量相的最佳条件．用此法测定了呼和浩特地区自来水和马奶酒中钼的含量，相对标准偏差分别为2．5％和3.1％，结果满意.
The optimum conditions for the determination of trace phases by ion-exchange resins were studied. The content of molybdenum in tap water and kumiss wine in Hohhot was determined by this method, with relative standard deviations of 2.5% and 3.1% respectively, with satisfactory results.