TAlifNi i iBUiGCTrace Analysis of Nitrosamines in Beer Using GCyg-MS/MS Alex Chen1, HansHans-Joachim Hübschmann2, Chan Sheot Harn 3, Li FangyanLi Fangyan3, Chew Yai FoongChew Yai Foong3, Michal Godula4 and Paul Silcock 4 1Al h A l ti l Pt Ltd SiAlpha Analytical Pte. Ltd., Singapore;Alpha Analytical Pte. Ltd., Singapore; 2Th Fi h S i tifi SiThermo Fisher Scientific, Singapore,Thermo Fisher