All-solid-state surfactant sensing electrode using conductive polymer as internal electric contact

Calcium‐Selective Electrodes for Measurements in the Presence of Anionic Surfactants

“…The break point positions relate to Ca(DS) 2 precipitation and to micellation at higher content of NaDS, and are in accordance with known data [34][35][36][37]. Thus, results presented in Figure 2 are consistent with the reports on reliability of the DS-ISE as a sensor of the DS À ion activity [9][10][11]23]. Highly selective Ca-ISEs 1, 10, 11 in mixed solutions of NaDS with 0.01 M CaCl 2 background responded similarly to the DS-ISE, see Figure 3.…”

“…The development and application of electrodes for sensing of surfactant flourishes, and a number of formulations have been described for measurements of anionic [9][10][11], cationic [11][12][13], and also nonionic surfactants [11,[14][15][16]. Contrary to this, studies of the surfactant interference with ionophore-based cation selective ISEs, including Ca 2 + -ISEs, were somehow abandoned.…”

“…Our approach relies on measurements with other ISEs, in parallel with Ca 2 + -ISE. In particular, a DS À -ISE known as reliable sensor of DS À [9][10][11]23] provided with the information on the activity of ionized DS. Use of Na + selective glass electrode allowed accessing the fraction of sodium bound by the DS micelles.…”

Modelling and optimization of surfactant sensor response characteristics for the use in surface water and wastewater analysis

“…Potentiometry with ion-selective electrodes (ISE) used as sensors is a simple, fast and inexpensive method for determining surfactants and avoids most of the limitations of classical titrimetric methods [3][4][5][6][7][8][9]. Flow-injection analysis was also used for potentiometric determination of anionic surfactants [10][11][12].…”

Ion-Selective Electrode for Anionic Surfactants Using Hexadecyl Trimethyl Ammonium Bromide-Sodium Dodecylsulfate as an Active Ionophore

“…Traditional analysis methods of anionic surfactant concentration require tedious procedures (such as liquid and gas chromatography), or the use of large amounts of undesired solvents (such as chloroform in the spectrophotometric "Methylene Blue" method) [1][2][3][4]. An alternative to these methods is the use of electrodes (such as ion-selective electrodes [5][6][7][8][9][10] or ion-selective field-effect transistors [11][12][13][14][15]). Potentiometric methods using ion-selective electrodes have found wide applications in diverse fields of analysis for being of low cost, sensitive, and applicable over a wide range of experimental conditions [16].…”