ThermoFisher Scientific Vanquish VH-D10, Руководство по эксплуатации

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6 • Operation
Vanquish Diode Array Detectors (VH-D10) Operating Manual Page 95
Parameters Description
Wavelength Set a wavelength for each UV_VIS_x signal channel
individually, in the range of 190 nm to 680 nm for up to
10 signal channels.
The wavelength defines the value at which the detector
measures the absorbance of the analyte(s) in the sample.
Observe the following:
• Set the Wavelength to the wavelength with the
absorbance maxima for the analytes of interest.
•
For best selectivity, select a specific wavelength for every
substance to be analyzed with a low optical bandwidth,
for example, by using a separate signal channel for each
analyte.
• To obtain optimum linearity, set the Wavelength to a
peak or a valley in the absorption spectrum. A valley can
provide best linearity for high concentrations.
Data collection rate The data collection rate is the number of data points per
second (Hz) that Chromeleon collects from the detector
and stores as raw data. Select a data collection rate up to
200 Hz.
Set the data collection rate, at which data is to be
collected from the detector. The data collection rate
applies for all signal channels and the 3D field.
As a standard, when setting the
Data Collection Rate
parameter, the response time and peak width are defined.
For guidelines on selecting the data collection rate, see
section 6.7.3 Selecting the Data Collection Rate, page 102 .
Bandwidth The bandwidth specifies the optical bandwidth (i.e. the
ability of the detector to distinguish between single
wavelengths), at which the signal channel (
UV_VIS ) is
recorded. In general, this corresponds to the optical
resolution of a detector.
The standard
Bandwidth is set to 4 nm. If required, you
can set a different value for the bandwidth.
For details on the bandwidth and setting it to a different
value, see
section 6.7.5 Optimizing the Bandwidth and Slit
Width Settings, page 103 .