A Strontium (II) Selective PVC Membrane Electrode Based onKryptofix 5 as an Ionophore

  • سال انتشار: 1394
  • محل انتشار: کنفرانس بین المللی مهندسی و علوم کاربردی
  • کد COI اختصاصی: ICEASCONF01_471
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 486
دانلود فایل این مقاله

نویسندگان

M Jeloudar Shoshtari

Department of Chemistry, khouzestan Science and Research Branch, Islamic Azad University, Ahvaz, Iran

چکیده

A potentiometric strontium-selective electrode based on kryptofix5 in PVC matrix for measurement of strontium ion is reported. The electrode was prepared by coating the surface of a graphite by a membrane containing nitrobenzene (NB), kryptofix5 and NaTPB in poly vinyl chloride (PVC) in tetrahydrofuran (THF). The membrane composition consisting of kryptofix5 , PVC, NB, NaTPB, the thickness of coated membrane, effect of pH and possible interfering cations were investigated and optimized electrode were evaluated. The electrode exhibits significantly enhanced response toward strontium ions over the concentration range1 × 10-6 to 1 × 10-1 M with slope of 29.2±0.3 mV/decade change of concentration and a detection limit of 4.54×10-7 M. Fast and stable response, good reproducibility, long-term stability is demonstrated. The electrode has a response time of 5 s and can be used for at least 2 weeks without any considerable divergence in their potential response. The proposed electrode shows fairly good discrimination of strontium from several cations. The practical utility of the electrode has been demonstrated by using it successfully as an indicator electrode in the potentiometric titration of Sr2+ with EDTA In addition, this electrode was successfully used for determination of strontium in real samples.

کلیدواژه ها

Strontium ion-selective electrode, Kryptofix 5, Potentiometry ,Graphite electrode

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.