Universal ATR Sampling Accessory User’s Guide . 13
Handling Samples
Care should be taken with all samples to ensure that spillages do not occur and that the
sample does not come into contact with any part of the accessory other than the top-plate.
A PVC “apron” (L1601856) is provided, that protects the top and front of the accessory.
Solid samples
Good contact between the sample and the surface of the crystal is important to prevent loss
of beam penetration. To aid this good contact the UATR pressure arm can be used, in
conjunction with a “shoe”, to apply a controlled force to the sample and make better contact
with the crystal.
The following shoes are available:
•
Large (L1601743) – for low sample pressures
•
Medium (L1601742) – for higher sample pressures
Liquid samples
Viscous liquids can be placed directly onto the surface of the UATR crystal.
Samples of volatile and non-viscous liquids should be placed in a “volatiles cup” (L1601746).
