2012 Product Catalogue

Specac Product Catalogue 2012 | Omni Cell System
Omni Cell System
A Universal Transmission Cell for the analysis of liquids and mulls in FTIR or
Dispersive Spectroscopy
Key Features
• Quick to assemble and change windows
• Windows and Spacers compatible with
older Specac cells
• FTIR and Dispersive compatibility
• Quick release clamping mechanism
• Low cost and reliable
• Wide choice of window materials
Omni Cell System
The Omni Cell System is a low cost novel
approach to the analysis of liquid samples in
transmission spectroscopy - one cell is suitable
for all applications.
The cells are compatible with all FTIR
Spectrometers as well as older dispersive
systems and can easily be configured for use as
demountable liquid cells, permanently sealed
liquid cells or as mull cells.
Transmission is a well established technique for
analyzing samples in the infrared. The choice of
window material, pathlength and window
configuration are determined by the sample and
wavelength range of interest. Samples can be
analyzed neat or diluted with an appropriate
solvent. For quantitative analysis, the sample is
often analyzed in a cell with a known pathlength.
A guide to the selection of the correct pathlength
for various concentrations is given below:
Analytical
Concentration
> 10 %
10 % – 1 %
1 % – 0.1 %
< 0.1 %
Typical
Pathlength
0.05 mm
0.1 mm
0.2 mm
> 0.5 mm
Solid samples can be analyzed using the mull
technique. The solid is combined with a mulling
agent such as Nujol or Fluorolube to form a mull
which is analyzed between circular windows.
Applications
Demountable Cells
• General Purpose
• All liquids
• Quantitative analysis
Sealed Cells
• Volatile liquids
• Quantitative applications
• Low viscosity liquids
Mull Cells
• High viscosity liquids
• Gels and pastes
• Oils and greases
• Solids suspended as mulls
Liquid Omni Cell Volumes
(Rectangular windows - top drilled, bottom undrilled)
Mylar spacer 0.006 mm thick - 2.00 microliters
Mylar spacer 0.012 mm thick - 4.00 microliters
Mylar or lead spacer 0.025 mm thick - 8.25 microliters
PTFE or lead spacer 0.05 mm thick - 16.50 microliters
PTFE or lead spacer 0.10 mm thick - 33.00 microliters
PTFE or lead spacer 0.20 mm thick - 66.00 microliters
PTFE or lead spacer 0.50 mm thick - 165.00 microliters
PTFE or lead spacer 1.00 mm thick - 330.00 microliters
N.B. Please note that the figures produced are for an
approximate volume of liquid contained between the
window faces only. It does not include any extra
amount of liquid that may be contained in the filling
port sections of either type of liquid cell.
All cells are shipped as a kit of parts and require
assembly by the user.
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