Unstable spray on Xevo instruments during infusion - WKB16868

SYMPTOMS

• Unstable spray during infusion
• Peaks blink off and on

ENVIRONMENT

• Xevo TQ MS
• Xevo TQD
• Xevo TQ-S
• Xevo TQ-S micro
• Xevo TQ-XS
• SQD2
• Xevo QTof
• Xevo Tof
• Xevo G2 QTof
• Xevo G2 Tof
• Xevo G2-S
• Xevo G2-S QTof
• Xevo G2-S Tof
• Xevo G2-XS
• Xevo G2-XS QTof
• Xevo G2-XS Tof

CAUSE

Incorrect Tune page settings for desolvation gas and temperature

FIX or WORKAROUND

1. Adjust desolvation gas flow for low flow (e.g., <500 L/h for 10 µL/min).
2. Adjust desolvation temperature for low flow (e.g., <200 °C for 10 µL/min).

ADDITIONAL INFORMATION

If the desolvation temperature is too high, the solvent will evaporate prior to leaving the capillary, thereby killing the electrospray effect.