研究目的
To demonstrate the capability of a surface-plasmon-resonance-based sensor to detect polysaccharide molecules, specifically Xanthan gum, in water desalination processes to prevent membrane fouling.
研究成果
The developed SPR sensor demonstrated a linear response to dissolved Xanthan gum concentrations up to 0.22 g/L, offering a promising solution for online water quality monitoring and bio-fouling prevention in desalination plants.
研究不足
The sensitivity of the SPR sensor was less than 5 ppm, with potential for further optimization. The study focused on Xanthan gum detection, and the applicability to other polysaccharides requires further investigation.
1：Experimental Design and Method Selection:
Utilized a surface plasmon resonance (SPR) sensor with a gold nano-thin-film chip attached with Concanavalin A (Con A) ligands for detecting Xanthan gum.
2：Sample Selection and Data Sources:
Xanthan gum dissolved in water at varying concentrations.
3：List of Experimental Equipment and Materials:
1550 nm laser source, fibre optic circulator, fibre optic collimator, BK7 glass prism, gold nano-film chip, fluidic chamber, pump, optical power meter.
4：Experimental Procedures and Operational Workflow:
Circulated water with dissolved Xanthan gum through the fluidic chamber, measured the change in reflected optical power due to SPR.
5：Data Analysis Methods:
Analyzed the reflected optical power waveforms to determine Xanthan gum concentration.
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1550 nm laser source
Provides the optical signal for the SPR sensor.
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fibre optic circulator
Routes the optical signal to and from the sensor chip.
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fibre optic collimator
Collimates the laser beam for interaction with the sensor chip.
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BK7 glass prism
Supports the gold nano-film chip and facilitates total internal reflection.
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gold nano-film chip
Acts as the sensing surface for the SPR sensor.
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fluidic chamber
Holds the water sample with dissolved Xanthan gum for testing.
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pump
Circulates the water sample through the fluidic chamber.
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optical power meter
Measures the reflected optical power to determine Xanthan gum concentration.
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