PVC matrix membrane sensor for fluorescent determination of phosphate.
A novel polyvinyl chloride (PVC) matrix membrane sensor responsive to inorganic phosphate ion was described. The working pH range is 4.0-6.0 and the response time is about 7.5min. Under the optimum condition, the sensor displayed a good linear response for H(2)PO(4)(-) anion over the concentration range 6.00-15.00mug/ml with a limit detection of 0.02mug/ml. The life span of membrane sensors is 90-120 days, and it could be used for 60 times with several supplements of the fluorescent probe. Applied for the determination of phosphate at levels of 8.00-12.00mug/ml in artificial seawater, the recoveries ranged from 96.6% to 103.8%, and the relative standard deviation was less than 4%.
Lin
Xucong
X
Institute of Food Safety and Environmental Monitoring, Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China.
Wu
Xiaoping
X
Xie
Zenghong
Z
Wong
Kwok-Yin
KY