Book ChapterDOI
Optical techniques for water monitoring
Patricia Scully
- pp 15-35
TLDR
The impact of the opto-electronics revolution in reducing cost of optical components and stimulating new materials and devices, along with new concepts in sensor technology, such as biosensors and immuno-sensors based on optical techniques, are explained in this paper.Abstract:
Publisher Summary This chapter focuses on optical techniques used for water monitoring, including sensors based on optical fibers, waveguide, and integrated optics technology. The impact of the opto-electronics revolution in reducing cost of optical components and stimulating new materials and devices, along with new concepts in sensor technology, such as biosensors and immuno-sensors based on optical techniques, are explained in this chapter. The effect of legislation versus cost of new technology is considered with examples of optical sensors suitable for water monitoring, including commercially available sensors. Optical sensors and techniques that reached the market place are based on colorimetric and fluorescence reactions, which are measured by spectrophotometric techniques using optical fibers. Medical, biotechnology and process control industries are exploiting new optical technology and many promising sensor principles and techniques.read more
Citations
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The “Musselmonitor®” as Biological Early Warning System
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Gas Sensor Applications in Water Quality Monitoring and Maintenance
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References
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Optical probes and transducers
Andreas Brecht,G. Gauglitz +1 more
TL;DR: An overview on optical transducer principles and optical (surface) analytical techniques relevant as part of bios sensing structures as well as probes in the development and optimisation of biosensing layers is given.
Journal ArticleDOI
A novel technique for optical fiber pH sensing based on methylene blue adsorption
TL;DR: In this article, a fiber optic pH sensor is reported based upon surfacic adsorption of methylene blue dye, producing absorption in the evanescent field surrounding the sensing fiber.
Journal ArticleDOI
Femtomolar sensitivity using a channel-etched thin film waveguide fluoroimmunosensor
T.E. Plowman,William M. Reichert,C.R Peters,Hsu-Kun Wang,Douglas A. Christensen,James N. Herron +5 more
TL;DR: The first report of femtomolar sensitivity in an immunosensing instrument is reported, using an etched channel siliconoxynitride thin film integrated optical waveguide to detect Femtomolar analyte concentrations.
Journal ArticleDOI
Grating couplers as chemical sensors: a new optical configuration
A. Brandenburg,A. Gombert +1 more
TL;DR: In this paper, an optical configuration is proposed that allows the determination of the coupling angle of an integrated optical grating coupler by means of a very simple set-up The sensor head is small and no moving parts are required A convergent (or divergent) light beam is directed onto the grating and the intensity distribution of the light reflected by the sample is analyzed.
Journal ArticleDOI
Fiber-optic remote detection of pesticides and related inhibitors of the enzyme acetylcholine esterase☆
TL;DR: In this paper, a method for remote detection of inhibitors of the enzyme acetylcholine esterase (AChE) with a fiber-optic photometer based exclusively on the use of solid-state opto-electronic components including light-emitting diodes and photodiodes was presented.