22 . Spectrum Two HATR User's Guide
Sample Preparation
To maximize the performance of your system, you must use the sample plate and crystal
best suited to your application; for information on crystals see Table 2 on page 10.
For information on collecting spectra using Spectrum software, refer to
on page 20.
Analyzing Liquids, Pastes and Gels
When analyzing liquids, pastes and gels, we recommend that you use the sample trough.
1.
Collect a background spectrum with the empty, clean sample trough.
2.
Place your sample material into the sample trough.
Make sure the sample covers the entire crystal surface.
If the sample is volatile, place the volatiles cover (L1205436) on top of the sample
trough. This prevents vapor entering the beam path and contributing to the collected
spectrum.
3.
Collect the sample spectrum, ratioing against the background spectrum.
4.
Clean the sample off the crystal, using a cotton swab moistened with an appropriate
solvent (see Table 2 on page 10).
Analyzing Powders
When analyzing powders, we recommend that you use the sample trough and apply pressure
to the powder using the pressure clamp.
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 trough.
3.
Place the powder sample in the sample trough to a depth of approximately 1 mm, then
level the powder with a spatula.
Make sure the sample covers the entire crystal surface.
4.
Place the powder spacer (L1362431) on top of the powder, and then place the pressure
pad on the powder spacer (Figure 15).
