G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 37/00 (2006.01) G01N 1/00 (2006.01) G01N 21/27 (2006.01) G01N 27/64 (2006.01) G01N 33/50 (2006.01)
Patent
CA 2354804
A method and a solid phase calibrant are provided suitable for use by untrained personnel to calibrate an analytical instrument under field conditions away from a laboratory. Filter discs or other suitable substrates are impregnated, by the process of adsorption, with solutions of known concentrations of analytes and chromatographic phase materials, such as polymers, in suitable solvents. The substrate material is selected to be chemically inert and to riot negatively interact with the analytes, the calibration process, or the analytical instrumentation. The polymers cause the analyte to adhere to the substrate until the solution is desorbed by heating, so that the impregnated substrates farm stable calibration solutions in solid phase which can be easily and reliably stored, transported, and used by operators with minimal training. The substrate is preferably contained in a card holder which can be easily inserted into and preferably mate with an inlet for the analytical instrument. Within the instrument, the solid phase calibrant is desorbed by heating the substrate to release a standardized amount of analyte calibrant into the instrument. The calibration technique is particularly suitable for ion mobility spectrometers which detect explosive or narcotic materials.
Danylewych-May Ludmila
Davies John Henry
Goledzinowski Maciej
Barringer Research Limited
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Smiths Detection - Toronto Ltd.
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