Abstract: A method for the detection or determination of a target comprising a plurality of target compounds, or derivatised target compounds, said method comprising: immobilizing said target on a carrier, directing radiation at said target, said radiation being selected to cause said target to emit a relevant radiation, detecting said relevant radiation emitted by said target, and analyzing said detected radiation to identify and/or quantify the plurality of target compounds in said target.

Abstract: Apparatus comprising a holder for a sample which comprises a packing or coating capable of immobilising or isolating a target compound in a layer or band, an excitation unit that emits radiation that excites fluorescence in a target compound or derivatised target compound immobilised or isolated in the packing or coating, or in another moiety stimulated by the target compound, a detection unit that is sensitive to radiation emitted by a fluorescing target compound, derivative or target compound-stimulated moiety and outputs a signal proportional to the amount of radiation detected, means for relatively moving the sample cartridge and the detection unit whereby the radiation may be sensed and a processing unit that converts the output of the detector unit into a readable value related to the amount of target compound immobilised in the layer or band.

Abstract: A method for the detection or determination of a target comprising a plurality of target compounds, or derivatised target compounds, said method comprising: immobilising said target on a carrier, directing radiation at said target, said radiation being selected to cause said target to emit a relevant radiation, detecting said relevant radiation emitted by said target, and analysing said detected radiation to identify and/or quantify the plurality of target compounds in said target.

Abstract: Apparatus comprising a holder for a sample which comprises a packing or coating capable of immobilising or isolating a target compound in a layer or band, an excitation unit that emits radiation that excites fluorescence in a target compound or derivatised target compound immobilised or isolated in the packing or coating, or in another moiety stimulated by the target compound, a detection unit that is sensitive to radiation emitted by a fluorescing target compound, derivative or target compound-stimulated moiety and outputs a signal proportional to the amount of radiation detected, means for relatively moving the sample cartridge and the detection unit whereby the radiation may be sensed and a processing unit that converts the output of the detector unit into a readable value related to the amount of target compound immobilised in the layer or band.

Abstract: A method for imaging a quantity of gas present in the atmosphere of a selected area. The method comprises the steps of directing background infra-red radiation from the selected area into an interferometer; imaging the infra-red radiation emerging from the interferometer onto at least one infra-red detector: obtaining a plurality of Fouriertransform infra-red spectra in the 8-14 micrometer spectral region, each spectrum coitesponding to infra-red radiation collected from a different portion of the selected area; and displaying in a suitable form an infra-red image, the infra-red image comprising the plurality of infra-red spectra, or quantities derived therefrom. The temperature of the quantity of gas or ambient temperature is measured, the temperature of the background is measured, and the difference between the two measured temperatures is used to derive gas column densities from the infra-red spectra.