(1. College of Chemistry, Liaoning University, Shenyang 110036, China; 2. School of Public Health Administration, Liaoning Medical University, Jinzhou 121001, China)
Abstract：In this paper, the conditions of separation and enrichment of trace amounts of molybdenum with 717 type anion exchange resin column have been studied. A method of spectrophotometric determination of molybdenum in copper concentrates and tailings is proposed. At pH 7.5, molybdenum in MoO42- was separated and enriched by the ion exchange resin, then eluted by 2 mol/L HNO3 +0.5 mol/L NH4NO3 mixture solution, which eliminated most of the interference from coexisting ions. The detection limit of the method was 5.6 μg/L. The method was successfully used to determine trace amounts of molybdenum in real samples with RSD of 2.2 % and the recovery between 96.2 % and 105.7 %.The results obtained by this method are in good agreement with those obtained by ICPAES.
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