Agilent, G3911-30000, FS ion injector, 0.6 mm id, 180 mm

The fast-switching ion injector is an LC/MS ion-transfer capillary designed to convey electrospray ions from the atmospheric-pressure source region toward the analyzer's ion optics. Its 0.6 mm internal diameter and 180 mm length define the replacement component and must be matched to the instrument's ion-source configuration. In fast-switching methods, stable ion transmission is important when alternating positive and negative ionization. Deposits or damage along the capillary can contribute to sensitivity loss or unstable response. Routine service involves cooling the source, following instrument-specific removal instructions and avoiding contamination or mechanical deformation during installation. Once the injector is fitted, check gas flow, source conditions, tuning response and polarity-switching performance with suitable reference samples. This is an LC/MS ion-transfer component, not a sample injection syringe or chromatography column.