前言为了研究金矿成矿规律,开展区域地质勘探,需要分析各种岩石样品中的金含量,而一般岩石中金含量甚微,为亚ppm至亚ppb量级,所以迫切要求建立高灵敏的分析方法和相应的地质标样,堆中子活化分析是测定金的最灵敏方法之一。由于金固有的地质和物理化学性质,痕量金在地质材料中的分布往往不均匀, Introduction In order to study the metallogenic regularity of gold deposits and carry out regional geologic exploration, it is necessary to analyze the gold content of various rock samples. However, the average gold content in rocks is as low as sub-ppm to sub-ppb, so it is urgent to establish highly sensitive Analytical methods and corresponding geological standards, heap neutron activation analysis is one of the most sensitive method of determining gold. Due to the inherent geological and physicochemical properties of gold, the distribution of trace gold in geological materials is often not uniform,