在法庭科学中，常常需要对送检微量液滴进行密度分析，传统测量液滴密度的方法有韦氏比重天平法、比重瓶测量法。然而当送检液滴体积小于0．5μL时，以上传统方法因重量难以测量而不能使用。这时需要使用红外线分光度计，气相层析仪等精密仪器进行分析，但很多实验室不具备购置 In forensic science, it is often necessary to conduct a density analysis of the droplet to be examined. The traditional methods of measuring the droplet density are Webster’s gravity balance method and pycnometer method. However, when the volume of the droplet to be inspected is less than 0.5 μL, the above conventional method can not be used because it is hard to measure. Then need to use infrared spectrophotometer, gas chromatograph and other precision instruments for analysis, but many laboratories do not have the purchase