fig1
![Extended characterization of the indoor dust chemical composition by retrospective suspect and non-target analysis of high resolution mass spectrometric data](https://image.oaes.cc/d649e25a-1bda-4d18-bb27-976701fceb65/5192.fig.1.jpg)
Figure 1. Venn diagram of detected unique compounds (at least Level 3). EI refers to GC-HRMS, whereas ESI refers to LC-HRMS in either positive or negative modes. EI: Electron impact; ESI: electrospray ionization; GC: gas chromatography; HRMS: high-resolution mass spectrometry; LC: liquid chromatography.