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Application of Graphite Coated Potassium-Selective Electrode in Determination of Potassium in Real Samples
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نویسنده
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Taheri Khalil ,Afsari Tahereh
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منبع
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analytical and bioanalytical electrochemistry - 2014 - دوره : 6 - شماره : 5 - صفحه:623 -633
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چکیده
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A graphite coated ion selective electrode (gcise) based on dibenzo-18-crown-6(db18c6) as a neutral carrier in a poly vinyl chloride (pvc) matrix was fabricated for thedetermination of k+ ions. the gcise exhibited a nernstion slope of 55.3 mv per decade fork+ ion over a wide concentration range of 1.0×10-5 to 1.0×10-1m. the lower detection limit is5.4×10-6m of kcl. this gcise had a short response time of 10s, and could be used in a phrange of 2.4 to 9.5. matched potential method (mpm) was used for determination ofselectivity coefficient. high selectivity was obtained over 10 various metal ions. the gcisewas reproducible and stable for a period of two weeks. it was successfully applied indetermination of potassium in oral rehydration salts (o.r.s) and mineral water
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کلیدواژه
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Graphite coated electrode ,K+ ion ,Selective electrode ,PVC membrane ,Dibenzo- 18-crown-6
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آدرس
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university of sistan and baluchestan, Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, Iran, ایران, university of sistan and baluchestan, Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, Iran, ایران
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Authors
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