Measuring A Liquid Sample - Agilent Technologies 5500t Operation Manual

Measuring a liquid sample

To apply a liquid sample to the system:
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The top and bottom windows are made from ZnSe. ZnSe can be damaged by
CAUTION
samples with a pH below 4 and above 9. Only measure samples with a pH
between 4 and 9.
ZnSe windows can be easily scratched by hard or abrasive samples. Avoid use of
CAUTION
samples that may scratch the surface of the windows.
Do not break the spectrometer seal and attempt to clean interior surfaces.
CAUTION
Breaking the seal will void the warranty.
Agilent 5500 Series FTIR Operation Manual
Open the sampling device (TumblIR) by rotating the arm
counterclockwise (see Figure 4).
The bottom window should be visible at this point. 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.
Ensure that the sample covers the entire surface area of the
bottom window (see Figure 6).
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. Use of the TumblIR with solid samples will
damage the ZnSe windows or modify the pre-set transmission
pathlength.
Analyzing Samples
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