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2006•Journal of Hebei UniversityRequires access

Ion-selective Electrode Method by Preactivating in Sulfuric Acid for the Determination of Trace Fluoride

Qibin Chen

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Abstract

An ion-selective eiectrode method was developed for the determination of the fluoride concentration at mg/L level.Fluoride ISE was preactivated in 0.5 mol/L H-2SO-4 medium and then fluoride was determined in TISAM medium.The linear range for the determination of fluoride is between 1.00 ×10~(-2)～1.00 ×10~(-7) mol/L,and the detection limit of the method is 1.9 μg/L.The method has been used for the determination of trace fluoride in tea drink,drinking water and milk with satisfactory results.A possible mechanism for the activation of FISE was proposed.

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What this paper is about

An ion-selective eiectrode method was developed for the determination of the fluoride concentration at mg/L level.Fluoride ISE was preactivated in 0.5 mol/L H-2SO-4 medium and then fluoride was determined in TISAM medium.The linear range for the determination of fluoride is between 1.00 ×10~(-2)～1.00 ×10~(-7) mol/L,and the detection limit of the method is 1.9 μg/L.The method has been used for the determination of trace fluoride in tea drink,drinking water and milk with satisfactory results.A possible mechanism for the activation of FISE was proposed.

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Available abstract

An ion-selective eiectrode method was developed for the determination of the fluoride concentration at mg/L level.Fluoride ISE was preactivated in 0.5 mol/L H-2SO-4 medium and then fluoride was determined in TISAM medium.The linear range for the determination of fluoride is between 1.00 ×10~(-2)～1.00 ×10~(-7) mol/L,and the detection limit of the method is 1.9 μg/L.The method has been used for the determination of trace fluoride in tea drink,drinking water and milk with satisfactory results.A possible mechanism for the activation of FISE was proposed.

Key concepts: Fluoride, Sulfuric acid, Chemistry, Detection limit, Ion selective electrode, Ion, Inorganic chemistry, Electrode

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