研究目的
To demonstrate the capability of a surface-plasmon-resonance-based sensor to detect polysaccharide molecules, such as Xanthan gum, in water desalination processes.
研究成果
The developed SPR sensor demonstrated a linear response to dissolved Xanthan gum concentrations up to 0.22 g/L, indicating its potential for online water quality monitoring and bio-fouling detection in desalination plants.
研究不足
The sensitivity of the SPR sensor was less than 5 ppm, which may require further optimization for higher sensitivity applications. The study focused on Xanthan gum detection, and the applicability to other polysaccharides may require additional ligand types.
1：Experimental Design and Method Selection:
The study utilized a surface plasmon resonance (SPR) sensor with a gold nanothin-film chip attached with Concanavalin A (Con A) ligands to detect Xanthan gum.
2：Sample Selection and Data Sources:
Xanthan gum was dissolved in water at varying concentrations.
3：List of Experimental Equipment and Materials:
A 1550 nm laser source, fibre optic circulator, fibre optic collimator, BK7 glass prism, gold nano-film chip, fluidic chamber, and optical power meter were used.
4：Experimental Procedures and Operational Workflow:
The sensor chip was exposed to water with dissolved Xanthan gum, and the change in reflected optical power was measured.
5：Data Analysis Methods:
The change in reflected optical power was analyzed to determine the Xanthan gum concentration.
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1550 nm laser source
Used as the light source for the SPR sensor.
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fibre optic circulator
Used to route the optical signal within the SPR sensor setup.
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fibre optic collimator
Used to guide the collimated laser beam to the prism.
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BK7 glass prism
Used as part of the SPR sensor structure to facilitate total internal reflection.
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gold nano-film chip
Used as the sensor chip with Con A ligands attached for detecting Xanthan gum.
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fluidic chamber
Used to circulate water with dissolved Xanthan gum over the sensor chip.
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optical power meter
Used to measure the reflected optical power from the SPR sensor.
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