Is it accurate to measure the purity of gold by hanging water method?

Hanging water method is a detection method to judge the purity of gold based on density difference. The method is simple in operation and low in cost, and is widely used in the field of gold identification. The accuracy of water hanging method is influenced by many factors, such as water temperature change, water surface tension, hook length, gold surface condition, operation technology level and so on. These factors lead to the error of the measurement results, and the result of measuring the purity of gold by suspended water method is not accurate.