Advancements in Noninvasive Volatile Organic Compound Detection: Integrating Stirling Cooling Preconcentration with GC-FID/MS for Quantitative Breath Analysis - Qiongdan Xu; Xiaoyu Hu; Lei Zhong; Zelin Wang; Huayong Zhao; Jia Fu; Dongdong Cao; Liu Liu; Yan Zhang; Jianlei Lang (ACS Omega)