Waters ACQUITY RDa Detector

Mass Accuracy

RMS error <2.5 ppm (measured using consecutive repeat measurements of sodium and rubidium iodide, with Lock Mass correction);
Mass scale calibration accuracy: <1 ppm with internal Lock Mass correction over range 50 to 2,000 m/z

Resolution

10,000 FWHM (measured on a singly charged ion between 550 and 650 m/z)

Sensitivity

Positive ion MS sensitivity: ≥22,000 ions/counts per second (m/z 556.28);
Negative ion MS sensitivity: ≥13,750 ions/counts per second (m/z 554.26)

Speed

Scan speed: 1 to 20 Hz

Dynamic Range

Chromatographic dynamic range: ≥4 orders of magnitude (measured using UPLC injections of lidocaine, monitoring the ion at m/z 235)