Analytical methods for Challenge7
(Updated on September 13, 2013)

Sample: The compound was isolated from red wine. The molecular formula of the [M+H]+ ion is C75H63O30.

Instrument: Xevo QTOF (Waters)
Ion source: ESI, positive ion mode
Capillary voltage: 0.5 kV, positive
CID condition: 20 V
Nebulizer gas: Nitrogen 300 C
Scan: m/z100-m/z3000
Precision on m/z: 9 ppm or better
Precursor ion for MS/MS analysis: m/z 1443

LC column: Waters InertSustain C18 (250 x 4.6 mm) 
Solvents: Acetonitrile (0.1% formate)
Flow rate: 0.5 mL/min
Detection: UV 280 nm
Retention time: 22.02 min