Accurate Mass Measurements in FAB Mode

Example The positive-ion high-resolution (HR) FAB spectrum of a cationic fluorescent marker dye shows the signal of the analyte ion enclosed by a set of mass reference peaks due to the admixture of PEG 600 (Fig. 10.13). The elemental 

Note Scanning of a magnet is affected by hysteresis. This improves the reproducibility of mass calibration after several scan cycles. For best results with dual-target probes, it is therefore recommended to skip the first few scans. 

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