Specifications include, but are not limited to: One or more companies that can provide Liquid Chromatograph Mass Spectrometer – Time of Flight. Xevo G2-XS QTof 4k A high-performance benchtop QTof mass spectrometer incorporating XS Collision Cell technology for enhanced sensitivity and selectivity. The instrument needs to identify, quantify and confirm a broad range of compounds in complex and challenging samples; provide maximum robustness with no compromise in performance, real world quantitative sensitivity and flexibility to adapt to changing needs. STEPWAVE Ion Optics The instrument should have Stepwave Ion transfer optics to increase the efficiency of ion transfer from the ion source to Mass Spectrometer analyzer and efficiently eliminate undesirable neutral contaminants.