Analytical methods for Challenge11 Instrument: LC-IT-TOF (Shimadzu) Ion source: ESI, negative ion mode Sample Introduction: Infusion Nebulizer gas: 1.5 L/min CDL: 200 C Heat block: 200 C MS/MS CID gas: Ar 50% MS/MS CID energy: 80% q: 0.210 (37.5 kHz)