Yun Zou is a postdoctoral researcher in the EOS project. She joined this project from January 2021, and she will explore the added-value of two-dimensional gas chromatography (GC×GC) coupled photoionization (PI) mass spectrometry (MS) on the breath volatile organic compounds (VOCs) to identify the structures of highly branched hydrocarbons. Her previous work focused on the development of analytical method using GC×GC-HRMS and GC×GC-LRMS to characterize the composition of the complex petrochemical, environmental, and biological samples.