Agilent Technologies 5500a, Руководство по эксплуатации

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Analyzing Samples
36 Agilent 5500 Series FTIR Operation Manual
When in the sample analysis mode, the ATR sample pathlength is
fixed based on the number of reflections in the ATR. The alignment
of the accessory is also pre-set at the factory and so there is no
optical or mechanical adjustment required.
The steps involved with analyzing a sample with the 5500a FTIR and
an ATR are:
1
Clean the ATR sample mounting window.
2
Collect a background spectrum.
3
Collect a sample spectrum.
Cleaning the accessory
To clean the ATR accessory:
1
Open the ATR sample press arm by lifting back until the sample
press tip reaches the top of its travel.
2
Clean the sample press tip first, then clean the sample mounting
window, indicated in Figure 7.
NOTE
Kimwipes or a suitable substitute (such as cotton swabs) should be used to
clean the sensor and sampling area. Clean the sample interface and press with a
suitable solvent such as acetone, methanol, ethanol or isopropyl alcohol.
CAUTION
Do not break the spectrometer seal and attempt to clean interior surfaces.
Breaking the seal will void the warranty.
Collecting a background spectrum
To ensure accuracy of the measurement, it is recommended that the
system is configured in the software to collect a background
spectrum before every sample is analyzed. This provides a baseline
profile of the system conditions with no sample loaded on the
instrument. By collecting a background automatically before each
sample measurement, negative effects of changes in the environment
can be avoided.