为解决液体样品预处理装置中罐体之间黏稠液体定量转移无法准确实现的问题，综合应用发明问题解决理论(TRIZ)和约束理论(TOC)进行问题分析与求解。从系统的角度分析了样品预处理装置的组成及要素间的相互关系，基于TRIZ进化模式和TOC必备树确定了样品预处理装置的核心问题，应用基于TRIZ的计算机辅助创新软件InventionTool 3.0中的冲突模块、标准解模块和效应模块进行了设计方案的选择、评价和修正，提出了实现液体样品预处理装置中黏稠液体定量转移的原理解。

To solve the problem that quantitative transfer of viscous liquid between tanks in the sample pretreatment devices couldn't be realized precisely, TRIZ and TOC are integrated for problem analysis and solving. The composition of sample pretreatment device and their relationship are analyzed from the system point of view, and then the core issues of the device is determined under the basis of evolution mode of TRIZ and prerequisite tree of TOC. Based on the modules of the conflict, standard solution and effect in computer-aided innovation software-InventionTool3.0, the choice, evaluation and amendment of design solutions is carried out. Finally, the principle solution to realize quantitative transfer of viscous liquid in sample pretreatment devices is put forward.