简要介绍了黄金纯度检测的基本方法，重点介绍了黄金纯度检测新技术——超声波相控阵检测技术的基本原理与方法。通过试验验证了超声波相控阵技术检测黄金纯度的可行性，可以检测出黄金纯度内部的气孔，块状夹杂及已熔化的夹杂，可以区分出24K与18K黄金。

The basic gold purity inspection method is introduced simply and the new gold inspection technology by ultrasonic phased array is focused in this paper. The principle of using phased array technology to inspect gold bar is analyzed. The ultrasonic phased array technology is reliable in gold inspection application which is verified by experiment. The result is that ultrasonic phased array technology could find the gas pore, inclusion defect and distinguish the 24K from 18K gold.