halid I. Abed Almonem , Hazem M. Abu Shawish, Abdalla M. Khedr, Salman M. Saadeh, M. Gaber
الملخص الانجليزي
New liquid membrane electrodes for submicromolar determination of praepagen HYCl surfactant have been prepared. These electrodes utilize HYCl with phosphotungstic acid (PTA) as ion-pair (HY–PT) dissolved in the plasticizers: dibutyl phthalate (DBP) encoded sensor S1, dioctyl phthalate (DOP) encoded sensor S2, dioctylsebacate
(DOS) encoded sensor S3 and tris(2-ethylhexyl) phosphate (TOPh) encoded sensor S4. The proposed electrodes
exhibit Nernstian slopes of 59.5 ± 0.6, 58.5 ± 0.6, 55.2 ± 0.6 and 57.3 ± 0.5 mV/decade in the concentration
ranges 1.0 × 10−7
–1.0 × 10−2
, 2.5 × 10−8
–1.0 × 10−2
, 8.0 × 10−8
–1.0 × 10−2 and 1.0 × 10−7
–1.0 × 10−2 M
and notably low limits of detection: 1.0 × 10−7
, 2.0 × 10−8
, 3.5 × 10−8 and 8.5 × 10−8 M for sensors S1, S2, S3
and S4 respectively. The sensors have considerably short response times (5–10 s) and good repeatability within
the pH range 2.8–9.4. The electrodes exhibit excellent selectivity for HY+ ions over many inorganic and organic
cations. These electrodes are useful for determination of HYCl in shampoo and liquid detergent solutions as
proved by standard addition and the calibration curve methods. Furthermore, the successful use as indicator
electrode was culminated by the potentiometric titration of HY+ ions in water samples
تاريخ النشر
05/07/2016
الناشر
Elsevier
رقم المجلد
220
رقم العدد
رابط DOI
doi.org/10.1016/j.molliq.2016.04.093
الصفحات
454-458
الكلمات المفتاحية
Praepagen HY Surfactant Ion-selective electrode Potentiometry
حازم محمد أبو شاويش | Hazem Mohamed Abu Shawish | 1560