中文摘要：

样品前处理新技术与方法研究是现代分析化学的重要研究课题与发展方向之一。固相萃取是目前应用最为广泛的样品前处理技术,其技术核心是吸附材料,因此开发新型吸附材料是样品前处理领域的研究热点。石墨烯是一种新型碳纳米材料,由于其良好的物理化学性质,在短短几年内迅速成为众多学科的研究热点。其高比表面积、良好的化学稳定性和热稳定性使之在分离科学领域得到广泛的应用。本文系统综述了石墨烯及其复合材料在样品前处理中的应用研究,主要包括其作为固定相在固相萃取、固相微萃取、磁固相萃取等技术在环境、食品、生物等样品前处理中的应用。

英文摘要：

Sample preparation procedure is crucial for the sensitivity,selectivity and accuracy of the quantitative analysis. The exploration and study of new technologies and methods in sample preparation have become important subject and direction in current analytical chemistry ow ing to its significance. Sorption-based extraction techniques are currently the most w idely applied sample preparation techniques. The core component of the sorption-based extraction techniques is adsorbent material,w hich dominates the selectivity and sensitivity of the method. Therefore,the development of new adsorbent materials is a hot research topic in sample preparation. As a novel class of carbonaceous nanomaterials,graphene has attracted considerable interest in many subjects due to its excellent physical and chemical properties. Remarkably,the superior merits of graphene,for instance,large specific surface area,good thermal and chemical stability,entirely lead to its numerous applications in separationscience. This article focuses on the application of graphene and its composites in many sample preparation technologies（ including solid-phase extraction,solid-phase microextraction,magnetic solid-phase extraction and other technologies） in order to monitor the trace substances in different matrices（ such as environmental,food, biological samples and so on）. Finally the existing problem of graphene in sample preparation is summarized, and the possible challenges and future perspectives in this field are also described.