矿石中微量金的测定需进行预富集。近来关于萃取色层分离富集金的报导较多,由于萃取色层载体来源等问题,影响其推广应用。本文提出将普通硅胶经扩孔处理,作为萃取色层富集金的载体。它具有化学惰性强、无 The determination of trace gold in ore needs to be pre-enriched. Recently, there have been many reports on the extraction and enrichment of gold by chromatographic separation, which has affected its popularization and application due to problems such as the source of extraction chromatography support. In this paper, ordinary silica gel by reaming treatment, as the extraction of color-rich gold carrier. It has a strong chemical inertia, no