Methods for Eliminating Background Interference of Thermal Desorption

Methods for eliminating background interference of thermal desorption were studied. Based on the traditional high temperature purification,tradem use of ultrasonic extraction and high temperature purification was proposed. It was found that the trandem using method showed good cleaning effect. The method showed improvement on eliminating background interference of thermal desorption,insuring quickly reuse of the thermal desorption tubes and ensuring the qualitative and quantitative accuracy of the target compounds.