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Explain the Coordination Chemistry and Chemical Speciation Utilized in the Analysis of Fluoride in Water Samples...

Explain the Coordination Chemistry and Chemical Speciation Utilized in the Analysis of Fluoride in Water Samples by Fluoride Ion-Selective Electrode.

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Fluoride Ion-Selective electrode (ISE) is based on a crystal of lanthanum fluoride (LaF3) doped with europium, Eu(II), at the level of approximately 1% to create crystal defects to improve conductivity. ISE's work on galvanic cell principal. The electric potential generated across a membrane by "selected" ions is compared to a reference electrode. The strength of the charge created is directly proportional to the concentration of the selected ion. The basic formula is: Ecell = Eise - Eref

(potential for the cell) = (potential of the ISE) - (reference potential)

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queen_honey_blossom answered 2 years ago
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