Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
ISSN-L : 0910-6340
Original Papers
A Non-potentiometric Sensing Method for the Determination of Pentoxyverine with PQC Sensors Based on Ion-pair Complexes
Jinbin YUANYong’an HULihua NIEShouzhou YAO
Author information

2001 Volume 17 Issue 12 Pages 1389-1393


The construction and general performance characteristics of three piezoelectric quartz crystal sensors responsive to the pentoxyverine are described here. This kind of non-potentiometric sensing method is based on use of ion-pair complexes of the pentoxyverine cation with three counter anions, namely, tungstophosphate, tetraphenylborate and picrolonate. The complexes were embedded in a PVC matrix. Adsorption of the pentoxyverine ion on the complex caused a frequency decrease of the crystal. The frequency decrease was proportional to the amount of adsorbed analyte. The influencing factors were investigated in detail, and then optimized. The proposed sensors exhibit reasonable selectivity and a higher sensitivity than the potentiometric sensors. For a sensor modified with pentoxyverine-phosphotungstate, the calibration graph was linear over concentration of 1.0 × 10-7 - 5.0 × 10-5 M with a detection limit of 6 × 10-8 M at pH 5.4.

Information related to the author
© 2001 by The Japan Society for Analytical Chemistry
Previous article Next article