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Fluorescence-Based Measurements of Phosphatidylserine/Phosphatidylinositol 4-Phosphate Exchange Between Membranes
Published on: March 14, 2021
PVC matrix membrane sensor for fluorescent determination of phosphate
Xucong Lin1, Xiaoping Wu, Zenghong Xie
1Institute of Food Safety and Environmental Monitoring, Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China.
Talanta
|October 31, 2008
Summary
A new polyvinyl chloride (PVC) sensor detects inorganic phosphate ions in artificial seawater. This sensitive and durable sensor offers accurate phosphate determination with a low detection limit.
Area of Science:
- Analytical Chemistry
- Materials Science
Background:
- Phosphate is a crucial analyte in environmental and biological systems.
- Development of selective and sensitive sensors for phosphate detection is essential.
Purpose of the Study:
- To develop and characterize a novel polyvinyl chloride (PVC) matrix membrane sensor for inorganic phosphate ion detection.
- To evaluate the sensor's performance in terms of working range, response time, sensitivity, and stability.
Main Methods:
- Fabrication of a PVC matrix membrane sensor.
- Optimization of working conditions, including pH.
- Electrochemical characterization and determination of response parameters.
- Application of the sensor for phosphate determination in artificial seawater samples.
Main Results:
- The sensor exhibited a working pH range of 4.0-6.0 and a response time of approximately 7.5 minutes.
- A linear response for dihydrogen phosphate anion (H(2)PO(4)(-)) was observed over the concentration range of 6.00-15.00 µg/ml, with a limit of detection of 0.02 µg/ml.
- The membrane sensor demonstrated a lifespan of 90-120 days and could be reused up to 60 times.
- In artificial seawater samples, phosphate determination yielded recoveries between 96.6% and 103.8% with a relative standard deviation less than 4%.
Conclusions:
- The developed PVC matrix membrane sensor is a promising tool for the selective and sensitive determination of inorganic phosphate.
- The sensor's stability, reusability, and accuracy in complex matrices like artificial seawater highlight its practical applicability.
- This sensor offers an efficient method for monitoring phosphate levels in environmental samples.
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