Potassium ion specific electrode with high selectivity for potassium over sodium.
نویسندگان
چکیده
A new potassium electrode, made from valinomycin, which uses commercially available electrode configurations, responds to potassium ion concentrations from 1 mole per liter to below 10(-6) mole per liter. It is highly selective for potassium ion over sodium ion and divalent ions and can be used for the direct determination of potassium ion in human serumn. No significant complexing of potassiium appears to occur in normal seruin.
منابع مشابه
Determination of potassium ion concentration in serum using a highly selective liquid-membrane electrode.
The potassium-selective glass membranes like KAS,,_, and NAS,,_, are approx. IO times more sensitive to K+ than to Na +lp3. Since the concentration ratio of Na+/K+ in blood serum is around 35-40 and since there is at best a K+ over Naf selectivity in glass electrodes of IO, a separate measurement of the Na+ concentration is needed to correct the reading of the K+ sensor 4. Because of the depend...
متن کاملEvaluation of the Jokoo-ION 150 AC: Guidelines for the evaluation of analysers by ion-selective electrodes
The Jokoo-ION 150 AC is an automatic sodium, potassium and chloride analyser which uses ion-selective electrodes.The sample mode can be whole-blood, serum or urine. To evaluate a urine sample, a previous dilution (1:6) with the standard 1 solution is required. For three concentrations of control materials, the total precision (CV) ranged from 0.17 to 1.22% for sodium, 0.22 to 1.69% for potassiu...
متن کاملEnergetics of Multi-Ion Conduction Pathways in Potassium Ion Channels
Potassium ion channels form pores in cell membranes, allowing potassium ions through while preventing the passage of sodium ions. Despite numerous high-resolution structures, it is not yet possible to relate their structure to their single molecule function other than at a qualitative level. Over the past decade, there has been a concerted effort using molecular dynamics to capture the thermody...
متن کاملDetermination of Cobalt(II) by a New PVC Membrane Coated Graphite Electrode Based on 6-chloro-11- azabenzo[a]phenothiazin-5-one as a neutral ion carrier
Cobalt has great biological effects on human beings and also other living organisms, hence its determination is very important. In this regard, a novel coated graphite electrode was designed for determination of Co2+ ions by exploiting 6-chloro-11- azabenzo[a]phenothiazin-5-one as a neutral ion carrier, for the first time. The foremost function was witnessed from the membrane composition of PVC...
متن کاملEffect of Berberis vulgaris Aqueous Extract on the Apoptosis, Sodium and Potassium in Hepatocarcinogenic Rats
Objective(s) The effect of Berberis vulgaris aqueous extract in hepatocarcinogenic rats was studied to investigate the apoptotic and sodium, potassium elements properties. A loss of both intracellular potassium and sodiumoccurs when apoptotic cells shrink and prior to the loss of membraneintegrity. Materials and Methods Forty-eight Sprague dawley rats were randomly divided into 2 groups, normal...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Science
دوره 167 3920 شماره
صفحات -
تاریخ انتشار 1970