A ammonia-treated polymer solution was prepared by adding 4.2 mL of 5 M ammonia to 0.1 g of poly (glycidyl methacrylate) dissolved in 20 mL of acetone. The polymer-immobilizing absorbent was prepared by the treatment of a cotton ball having no metal ion adsorption feature with the ammonia-treated polymer solution. The adsorption and elution behaviors of the adsorbent to the samples of various elements were examined by ICP-OES, and the specific adsorption values of platinum(II), gold(III), and mercury(II) were found. Also, regarding other elements in a multi sample, not absorb to the adsorbent. Platinum(II), gold(III), mercury(II) adsorbed on the adsorbent could be eluted with 1 M hydrochloric acid at 93 %, 52 %, and 90 %, respectively. Multicycles of adsorption and elution operation are also possible. The method shown in this study is expected to apply to the separation and recovery of precious metals from urban mines where cost effectiveness and environmental impact are important.