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CPC - G01N - 15.04.2013 - page 71G01N 2021/757 . . using immobilised reagentsG01N 2021/758 . . using reversible reactionG01N 2021/77 . . by observing the effect on a chemical indicatorG01N 2021/7703 . . . { using reagent-clad optical fibres or optical waveguides ( using measurement oftotal internal reflection or attenuated total reflection G01N 21/552 ; optical fibresor waveguides per se G02B ) }G01N 2021/7706 . . . . Reagent provisionG01N 2021/7709 . . . . . Distributed reagent, e.g. over length of guideG01N 2021/7713 . . . . . . in coreG01N 2021/7716 . . . . . . in claddingG01N 2021/772 . . . . . Tip coated light guideG01N 2021/7723 . . . . . Swelling part, also for adsorption sensor, i.e. without chemical reactionG01N 2021/7726 . . . . . Porous glassG01N 2021/773 . . . . . Porous polymer jacketPolymer matrix with indicatorG01N 2021/7733 . . . . . Reservoir, liquid reagentG01N 2021/7736 . . . . . exposed, cladding freeG01N 2021/775 . . . Indicator and selective membraneG01N 2021/7753 . . . Reagent layer on photoelectrical transducerG01N 2021/7756 . . . Sensor typeG01N 2021/7759 . . . . DipstickTest stripG01N 2021/7763 . . . . Sample through flowG01N 2021/7766 . . . . Capillary fillG01N 2021/7769 . . . Measurement method of reaction-produced change in sensorG01N 2021/7773 . . . . ReflectionG01N 2021/7776 . . . . IndexG01N 2021/7779 . . . . interferometricG01N 2021/7783 . . . . Transmission, lossG01N 2021/7786 . . . . FluorescenceG01N 2021/7789 . . . . Cavity or resonatorG01N 2021/7793 . . . Sensor comprising plural indicatorsG01N 2021/7796 . . . Special mountings, packaging of indicatorsG01N 2021/78 . . . producing a change of colourG01N 2021/786 . . . . with auxiliary heating for reactionG01N 2021/82 . . . producing a precipitate or turbidityG01N 2021/825 . . . . AgglutinationG01N 2021/84 . Systems specially adapted for particular applicationsG01N 2021/8405 . . Application to two-phase or mixed materials, e.g. gas dissolved in liquidsG01N 2021/8411 . . Application to online plant, process monitoringG01N 2021/8416 . . . and process controlling, not otherwise provided forG01N 2021/8422 . . { Investigating thin films, e.g. matrix isolation method }