Spectrum Two HATR User's Guide . 23
Figure 15 Using the trough plate and pressure clamp for analyzing powders
5.
Place the pressure pad in the V-shaped slot in the clamp, so that the graduated scale on
the pressure plate faces toward you.
6.
Apply pressure to the sample with the clamp.
CAUTION
Excessive pressures can crack and permanently damage the ATR crystal.
Do not use the pressure clamp to crush the sample, and do not apply
pressure to the crystal for extended periods of time.
7.
Collect the sample spectrum, ratioing against the background spectrum.
8.
Clean the sample off the crystal, using a cotton swab moistened with an appropriate
solvent (see Table 2 on page 10).
Analyzing Films
When analyzing films, we recommend that you use the flat sampling plate.
1.
Make sure that the pressure clamp is properly installed.
If required, refer to
on page 18.
2.
Collect a background spectrum with the empty, clean sample plate.
3.
Place the sample on the sample plate.
Make sure that the sample covers the entire crystal surface.
4.
Apply pressure to the sample with the clamp.
CAUTION
Excessive pressures can crack and permanently damage the ATR crystal.
Do not use the pressure clamp to crush the sample, and do not apply
pressure to the crystal for extended periods of time.
