The popularity of diapers containing superabsorbent polymers has increased and so has the need to develop techniques that permit the determination of the superabsorbent polymer. Superabsobent polymers are polyacrylic acids manufactured with some degree of neutralization. As these are cross-linked materials that are not soluble in any solvent, their determination can be very difficult. In the past, several techniques were used that took advantage of the presence of sodium to determine superabsorbent polymers in different matrices. These procedures were too sophisticated, too expensive or out of the reach of most analytical laboratories. The measurement of the degree of neutralization of superabsorbent polymers is desirable for production purposes and to monitor the quality of the polymer. A double titration procedure has been used to determine the amount of neutralization. However, when polymer is present, it can take hours to obtain a steady pH reading. Several applications in which a sodium ion-selective electrode has been used for the measurement of superabsorbent polymers in different matrices and for the determination of the degree of neutralization of the superabsorbent polymer are described. The applications include determination of superabsorbent polymer in air for workers' exposure, analysis for superabsorbent polymer in diapers and determination of degree of neutralization to ensure the quality of the polymer. The procedure is very simple and inexpensive.