Novel Phosphate-sensitive Fluorescent Composite Matrix

高等学校化学研究 ›› 2003, Vol. 19 ›› Issue (2): 201-205.

Novel Phosphate-sensitive Fluorescent Composite Matrix

XIE Zeng-hong, LIN Xu-cong, CHEN Guo-nan

Department of Chemistry, Fuzhou University, Fuzhou 350002, P. R. China

收稿日期:2002-04-15 出版日期:2003-04-24 发布日期:2011-08-06
基金资助:
Supported by the Foundation for University Key Teacher by the MOE, Natural Science Foundation of Fujian Province of China(No.D9910009) and Three Projects of Science and Technology of Fujian Province(No.K99037).

Novel Phosphate-sensitive Fluorescent Composite Matrix

XIE Zeng-hong, LIN Xu-cong, CHEN Guo-nan

Department of Chemistry, Fuzhou University, Fuzhou 350002, P. R. China

Received:2002-04-15 Online:2003-04-24 Published:2011-08-06
Supported by:
Supported by the Foundation for University Key Teacher by the MOE, Natural Science Foundation of Fujian Province of China(No.D9910009) and Three Projects of Science and Technology of Fujian Province(No.K99037).

摘要/Abstract

摘要： Via several techniques to modify sensitive matrix for inhabiting the leakage of fluorescent indicator, a new stable sensing material for monitoring phosphates has been prepared and applied to the measurement of phosphates in artificial seawater. It is based on the reaction of PO₄^3- with Al(Ⅲ)-Morin that leads to the fluorescence quenching of the composite matrix. At pH value 4.0 and the salinity value 25.0, the response time of output signal having reached the steady state is less than 300 seconds. Its calibration graph is gained in the range of H₂PO₄^- mass concentration from 1.50 to 7.00 μg/mL with the limit of detection(3σ/K) 0.02 μg/mL. When it was used to measure phosphates in artificial seawater, the recovery ranged from 96.78% to 102.09%. Being stored under the proper condition, the membranes maintain sensitive for 90-120 days, and are able to be used for 50-80 times with indicator supplement.

关键词: PVA/PVC composite membrane, Phosphate, Al-Morin

Abstract: Via several techniques to modify sensitive matrix for inhabiting the leakage of fluorescent indicator, a new stable sensing material for monitoring phosphates has been prepared and applied to the measurement of phosphates in artificial seawater. It is based on the reaction of PO₄^3- with Al(Ⅲ)-Morin that leads to the fluorescence quenching of the composite matrix. At pH value 4.0 and the salinity value 25.0, the response time of output signal having reached the steady state is less than 300 seconds. Its calibration graph is gained in the range of H₂PO₄^- mass concentration from 1.50 to 7.00 μg/mL with the limit of detection(3σ/K) 0.02 μg/mL. When it was used to measure phosphates in artificial seawater, the recovery ranged from 96.78% to 102.09%. Being stored under the proper condition, the membranes maintain sensitive for 90-120 days, and are able to be used for 50-80 times with indicator supplement.

Key words: PVA/PVC composite membrane, Phosphate, Al-Morin

XIE Zeng-hong, LIN Xu-cong, CHEN Guo-nan. Novel Phosphate-sensitive Fluorescent Composite Matrix[J]. 高等学校化学研究, 2003, 19(2): 201-205.

XIE Zeng-hong, LIN Xu-cong, CHEN Guo-nan. Novel Phosphate-sensitive Fluorescent Composite Matrix[J]. Chemical Research in Chinese Universities, 2003, 19(2): 201-205.

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Novel Phosphate-sensitive Fluorescent Composite Matrix

Novel Phosphate-sensitive Fluorescent Composite Matrix

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