ThermoFisher Scientific Vanquish VH-D10, Operating Manual

Page: 30 / 196

3 • Detector Overview
Page 30 Vanquish Diode Array Detectors (VH-D10) Operating Manual
3.1 Detector Features
The detector comprises the following main features:
•
A deuterium lamp for ultraviolet (UV) and visible (VIS) wavelength
detection as the light source of the detector
The deuterium lamp provides light for the complete wavelength
detection range from 190 nm to 680 nm.
• Fused-silica LightPipe™ flow cells for minimum noise and peak
dispersion
•
Internal validation of the wavelength accuracy with holmium oxide
glass filter
•
Variable slit width, settable to 1, 2, 4 or 8 nm, to optimize baseline
noise and optical resolution
• For data collection, the detector supports the following features:
♦ Data acquisition rate up to 200 Hz
♦ Acquiring 3D data fields (spectra) to record all wavelengths
simultaneously
Among other things, 3D spectra make peak purity analysis and
spectral library search for peak identification possible.
♦ Recording of up to 10 signal channels at individual
wavelengths (2D data)
• Identification (ID) chip on the deuterium lamp and the flow cell
•
Thermal control using heaters for the optics and a cooling fan for the
lamp house
•
Motorized filter paddle (shutter) to move into the light path before
the flow cell
The filter paddle can move into the following positions:
♦
Open position for data acquisition
♦
Closed (dark) position for protection of the flow cell
♦
Holmium oxide filter position for validation of wavelength
accuracy