Screen cell and method of using
First Claim
1. A method of analyzing a specimen comprising the steps of forming a specimen support of a rigid material that is non-reactive to water, acidic substances and solvents having a pair of opposed surfaces and having a plurality of unobstructed holes in a rigid surface disposed between said pair of opposed surfaces, the axes of said holes being substantially perpendicular to said opposed surfaces;
- enclosing each hole with an unsupported layer of a specimen to be analyzed, said specimen being selected from the group consisting of liquid, solid, paste or powder, said holes sized to retain a specimen to be analyzed enclosing said hole when said specimen support is positioned so that said opposed surfaces are vertical;
positioning said support so that the axes of said holes are horizontal;
directing a beam of infrared light through the holes and through the layer of said specimen enclosing each hole; and
generating a wavelength spectrum of said beam passing through said layer.
3 Assignments
0 Petitions
Accused Products
Abstract
A method of analyzing a specimen by infrared spectroscopy is disclosed wherein a specimen support having a plurality of unobstructed holes of substantially uniform size and a film of the specimen enclosing each hole is positioned vertically in the spectrometer and a beam of infrared light is directed through the holes to generate a wavelength spectrum characteristic of the specimen.
12 Citations
8 Claims
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1. A method of analyzing a specimen comprising the steps of forming a specimen support of a rigid material that is non-reactive to water, acidic substances and solvents having a pair of opposed surfaces and having a plurality of unobstructed holes in a rigid surface disposed between said pair of opposed surfaces, the axes of said holes being substantially perpendicular to said opposed surfaces;
- enclosing each hole with an unsupported layer of a specimen to be analyzed, said specimen being selected from the group consisting of liquid, solid, paste or powder, said holes sized to retain a specimen to be analyzed enclosing said hole when said specimen support is positioned so that said opposed surfaces are vertical;
positioning said support so that the axes of said holes are horizontal;
directing a beam of infrared light through the holes and through the layer of said specimen enclosing each hole; and
generating a wavelength spectrum of said beam passing through said layer. - View Dependent Claims (2, 3, 4, 5, 6)
- enclosing each hole with an unsupported layer of a specimen to be analyzed, said specimen being selected from the group consisting of liquid, solid, paste or powder, said holes sized to retain a specimen to be analyzed enclosing said hole when said specimen support is positioned so that said opposed surfaces are vertical;
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7. An analytic specimen support for insertion in a spectrometer comprising a pair of opposed generally flat surfaces composed of rigid material that is non-reactive to water, acidic substances and solvents and having a plurality of unobstructed holes in a screen disposed between said pair of opposed, generally flat surfaces, the outer edges of said support being adapted to be placed vertically in said spectrometer;
- the screen being positioned with respect to said surfaces such that when the support is placed vertically in a spectrometer the unobstructed holes are positioned in the path of the spectrometer beam;
the cross-sectional area of each hole is in the range of 0.01 to 4 mm2 sufficient to retain about 0.1 microliter of liquid spanning said hole for at least 4 seconds when said screen is in a vertical position, the liquid being held in said hole by the surface tension of the liquid. - View Dependent Claims (8)
- the screen being positioned with respect to said surfaces such that when the support is placed vertically in a spectrometer the unobstructed holes are positioned in the path of the spectrometer beam;
Specification