HPLC/MS-MS Identification of Oak Quercus aegilops Root Tannins

Figure 1

Standard mix of HPLC/MS-MS (optimized instrument parameters: medium-flow collision-activated dissociation (CAD) gas wiht curtain (CUR) gas: 24 psi; nebulizer gas (gas 1): 30 psi; heater gas (gas 2): 25 psi; ion spray voltage: −4500 V; source temperature: 550°C; compound-dependent voltage parameters for each standard are shown in Table 3.

(a)

(b)