Domain Delineation of an Emerging Field of Interdisciplinary Research Using Scientometric Methods: Case Study of Exposomics

— This article presents an analysis of citation and co-citation in exposomics, an emerging interdisciplinary field of biomedical, biochemical, and other research related to environmental impacts on health. Exposomics is adjacent to several research fronts (genomics and metabolomics). Distinct research subfields in the considered area are defined based on clusters of highly cited and highly co-cited documents from the Google Scholar database, together with the corresponding citing publications. By varying the co-citation threshold, research subfields can be distinguished: a general area focused on developing the concept of exposome and individual specialized subfields. The problem of delineation of research topics within interdisciplinary research monitoring is discussed.