Analyzing Samples
Agilent Cary 630 FTIR Spectrometer User’s Guide 47
CAUTION
Do not break the spectrometer seal and attempt to clean interior surfaces.
Breaking the seal will void the warranty.
Collecting a background spectrum
For instructions on collecting a background using the software, refer
to the Agilent MicroLab PC Software User’s Guide.
CAUTION
To ensure an accurate background spectrum is collected, perform a visual
inspection of the ZnSe window surfaces, looking for any haze or film present on
the windows from measuring the previous sample. If a film is observed, repeat
the cleaning procedure on Page 46 until the window surfaces are clear of any
residue.
Collecting a sample spectrum
To load a liquid sample and collect a spectrum using the TumblIR
accessory:
1 Open the TumblIR by rotating the arm counterclockwise.
2 Place a small amount of material on the bottom window located
on the TumblIR base plate. The sample window is the 2 mm
diameter yellow material held in place by the surrounding metal
disk.
3 Ensure that the sample covers the entire surface area of the
bottom window.
In the case of a volatile sample, such as with fuels analysis, larger
amounts of sample can be applied without concern of leakage or
damage to the instrument; however, using the smallest amount of
sample possible will ease in the cleaning process.
Although it is safe to run a variety of liquid samples, including,
aqueous solutions or even thick pastes such as grease, the
TumblIR is not to be used with any solid or powder samples, such
as tablets. Using the TumblIR with solid samples will damage the
ZnSe windows or modify the pre-set transmission pathlength.
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