Thunthy K H, Fortier A P
J Ala Dent Assoc. 1990 Spring;74(2):13-8.
Silver (Ag) was removed from unexposed Kodak X-OmatRP; T-MatG; X-Omat duplicating; and ultraspeed periapical dental radiographic films by immersing them into a fixer solution until the films were completely translucent. The silver was recovered from the fixer solution by the electrolytic plating technique. The number of unexposed films needed to be fixed in order to recover one troy ounce of silver by electrolysis was as follows: 250 panoramic films or 200 cephalometric films or 2,000 posterior periapical films. The silver was assayed for its purity by energy dispersive x-ray analysis, coupled to a scanning electron microscope. Depending on the sample tested, the purity of the silver recovered by electrolysis varied from 78 to 89 percent.
通过将未曝光的柯达X-OmatRP、T-MatG、X-Omat复制片和超高速根尖牙科X线胶片浸入定影液中直至胶片完全半透明，从而去除其中的银（Ag）。采用电镀技术从定影液中回收银。通过电解回收一盎司银所需固定的未曝光胶片数量如下：250张全景片或200张头颅侧位片或2000张根尖后牙片。通过与扫描电子显微镜联用的能量色散X射线分析来测定回收银的纯度。根据所测试的样品，电解回收银的纯度在78%至89%之间变化。
