TY - JOUR
T1 - A study of the anomalous behaviour of the glass electrode in solutions containing hydrofluoric acid
AU - Sørensen, Emil
AU - Lundgaard, T.
PY - 1965
Y1 - 1965
N2 - A defined surface hydration of the glass electrode is secured by pre-treatment with 0.1 N HF followed by rinsing with pure 0.1 N HCl for a few minutes. On subsequent contact with 0.1 N HCl containing HF, the electrode potential shows a change which is determined by the [HF].
The immediate reaction is an adsorption of HF by the glass surface. This is followed, at [HF] higher than 0.01 N, by the substitution of two F− for OH− per Si atom.
With increasing HF the attack on the Si-O-Si bonds becomes severe, but it can be tolerated to a considerable degree because the newly formed surface is identical with the previous one.
Some applications of the glass electrode in titrations with HF are suggested in an appendix.
AB - A defined surface hydration of the glass electrode is secured by pre-treatment with 0.1 N HF followed by rinsing with pure 0.1 N HCl for a few minutes. On subsequent contact with 0.1 N HCl containing HF, the electrode potential shows a change which is determined by the [HF].
The immediate reaction is an adsorption of HF by the glass surface. This is followed, at [HF] higher than 0.01 N, by the substitution of two F− for OH− per Si atom.
With increasing HF the attack on the Si-O-Si bonds becomes severe, but it can be tolerated to a considerable degree because the newly formed surface is identical with the previous one.
Some applications of the glass electrode in titrations with HF are suggested in an appendix.
U2 - 10.1016/0022-0728(65)80004-3
DO - 10.1016/0022-0728(65)80004-3
M3 - Journal article
SN - 1572-6657
VL - 9
SP - 128
EP - 133
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
ER -