New Ion‐Pair Based All‐Solid‐State Surfactant Sensitive Sensor for Potentiometric Determination of Cationic Surfactants

Abstract

Cationic surfactants of different types were determined using a few potentiometric sensors based on ion-pair complexes (dodecyldimethylbenzylammonium dodecylsulfate, dodecylmethylbenzylammonium dodecylbenzensulfonate, tetrahexadecylammonium dodecylsulfate and Hyamine (benzethonium dodecylsulfate)) as sensing materials. The response of the all-solid state surfactant sensitive electrode based on a Teflonized graphite conducting substrate, coated with a PVC membrane containing sensing material, was investigated in the solutions of Hyamine and hexadecyltrimethylammonium ion in the concentration range from 1 mM to 10 mM. Potentiometric surfactant cation titration has been performed using sodium dodecylsulfate as titrant and an ion-pair-based surfactant sensitive electrode as a potentiometric indicator. Several commercial surfactant products have also been titrated and the results were compared with those obtained with two-phase standard titration method.

New Screen‐Printed Ion‐Selective Electrodes for Potentiometric Titration of Cetyltrimethylammonium Bromide in Different Civilic Media

“…The SPCPEs and CPEs showed very fast response times (Figure 4) (3 s for concentration 10 À3 mol L À1 and 5 s for lower concentration) which were shorter than the previously published surfactant sensors [11][12][13][14][15][16][17][18] and the equilibrium potentials essentially remained constant for 10 min. These fast response times can be explained by the fact that these electrodes contain carbon particles surrounded by a very thin film of o-NPOE and acting as a conductor [41] and the absence of the internal reference solution.…”

Application of surfactant modified zeolite membrane electrode towards potentiometric determination of perchlorate

“…Comparison of this calculated value with theoretical Nersntian value (59.2 mV per decade of ClO À 4 concentration) by statistical (t) parameter (t calc = 1.87 and t 0.05,13 = 2. 16) shows that the difference between them is due to random errors. On the other hand, the proposed SMZ membrane electrode is applicable to measure ClO À 4 anion in aqueous solutions.…”

“…The design of anion receptors is far less developed than the field of cation receptors and this is reflected by the fact that majority of polymeric membrane based ISEs has been described for determination of cations [13,16,17]. The development of selective and sensitive liquid polymeric membrane electrodes for anions is of increasing interest for clinical, industrial, as well as environmental applications.…”

Novel Enzymatic Potentiometric Approaches for Surfactant Analysis

“…Liquid and PVC membranes electrodes are inconvenient as they are mechanically complicated with difficulty of miniaturization and short lifetime. Solid‐state electrodes were reported referring to a new type of ISEs in which the internal reference element was in direct contact with the electroactive membrane . Elimination of the internal reference solution leads to certain advantageous such as simplicity, miniaturization and ability to operate at higher pressure environment where the PVC membrane can be damaged.…”