A comparative study of solid and liquid inner contact benzalkonium chloride ion-selective electrode membranes

Talanta ◽  
2012 ◽  
Vol 101 ◽  
pp. 211-219 ◽  
Author(s):  
Hazem M. Abu Shawish ◽  
Abdalla M. Khedr ◽  
Khalid I. Abed-Almonem ◽  
M. Gaber
Keyword(s):  
Comparative Study ◽  
Benzalkonium Chloride ◽  
Chloride Ion ◽  
Ion Selective Electrode ◽  
Selective Electrode

Discrepancies Between Sodium Concentrations Measured by the Kodak Ektachem 700 and by Dilutional and Direct Ion-Selective Electrode Analyzers

1992 ◽  
Vol 38 (12) ◽  
pp. 2419-2422 ◽  
Author(s):  
J A Stone ◽  
J R Moriguchi ◽  
D R Notto ◽  
P E Murphy ◽  
C J Dass ◽  
...  
Keyword(s):  
Total Protein ◽  
Benzalkonium Chloride ◽  
Gamma Globulin ◽  
Ion Selective Electrode ◽  
Plasma Sodium ◽  
Selective Electrode ◽  
Sodium Potassium ◽  
Clinically Significant

Abstract We have identified rare (approximately 0.2% of all samples), but clinically significant, discrepancies between serum or plasma sodium concentrations measured with the Kodak Ektachem 700's direct ion-selective electrode (ISE) method and concentrations measured with two other analyzers: the Beckman Synchron CX3's dilutional ISE instrument and the Radiometer KNA2 instrument for sodium-potassium analysis by the direct ISE method. The differences do not appear to be related to any previously identified sources of discrepancy, such as variations in triglycerides, bicarbonate, total protein, albumin, or gamma-globulin, the presence of paraproteins, or interference by benzalkonium chloride from heparinized catheters. They occurred despite the use of Gen 04 reference fluid on the Ektachem. We could not identify any drug or family of drugs that the patients had taken in common and that might influence the results. Until this problem is resolved, Ektachem users should be aware of the potential for discrepancies of > 6 mmol/L in measurements of sodium concentrations.

Ion Selective Electrode for Determination of Chloride Ion in Biological Materials, Food Products, Soils, and Waste Water

1978 ◽  
Vol 61 (6) ◽  
pp. 1493-1495 ◽  
Author(s):  
Ivan Sekerka ◽  
Josef F Lechner
Keyword(s):  
Waste Water ◽  
Chloride Ion ◽  
Food Products ◽  
Biological Materials ◽  
Nutrient Broth ◽  
Ion Selective Electrode ◽  
Sample Treatment ◽  
Selective Electrode ◽  
Beef Extract

Abstract The chloride ion selective electrode is used for a rapid, simple, and reliable determination of chloride ion in biological materials (blood serum, urine, fish, and plant tissues), food products (milk, beef extract, nutrient broth and orange, tomato, and grapefruit juices), soils, and waste water (industrial and municipal). The method consists of treating the samples with perchloric acid (pH 1) and potassium peroxydisulfate and determining the chloride content either by a calibration curve or by known addition or analyte addition, using the chloride ion selective electrode. Such sample treatment eliminates most of the interferences occurring in the samples, including iodide, complexing and reducing compounds, and macromolecular and surface-active species. The method is suitable for a wide range of chloride concentration, e.g., 5010 ppm CI in nutrient broth and 4890 ppm in beef extract and as low as 12 and 80 ppm in soil extracts.

A comparative study of liquid and solid inner contact roxatidine acetate ion-selective electrode membranes

2015 ◽  
Vol 26 (6) ◽  
pp. 714-720 ◽  
Author(s):  
Mohamed K. Abd El-Rahman ◽  
Hala E. Zaazaa ◽  
Samah S. Abbas ◽  
Badr El-Zeany ◽  
Zeinab A. EL-Sherif ◽  
...  
Keyword(s):  
Comparative Study ◽  
Ion Selective Electrode ◽  
Selective Electrode ◽  
Roxatidine Acetate

Analysis for Chloride Ion in High Purity Water and Heavy Water of Pressurized Reactors and Cooling Systems by Ion Selective Electrode

1977 ◽  
Vol 60 (3) ◽  
pp. 625-627
Author(s):  
Ivan Sekerka ◽  
Josef F Lechner ◽  
Les Harrison
Keyword(s):  
Heavy Water ◽  
High Purity ◽  
Water Samples ◽  
Chloride Ion ◽  
Ion Selective Electrode ◽  
Steam Generators ◽  
Selective Electrode ◽  
Cooling Systems ◽  
Reliable Determination ◽  
Standard Solutions

Abstract A rapid, simple, sensitive, and reliable determination of parts per billion (ppb) levels of chloride ion is described for high purity water or heavy water of pressurized and high temperature reactors, steam generators, and cooling systems by mercurous chloride-mercuric sulfide ion selective electrode. The method has been applied to heavy water samples of CANDU-type nuclear reactors as well as to the water of conventional steam generators. The manual method consists of treating 100 ml aliquots of standard solutions and water samples with 1 ml 2M HNO3. A calibration curve is constructed from the millivolt readings obtained in the standard solutions, and chloride ion concentration of the samples is determined by comparing the mv reading of the sample with the calibration graph. The automated and computerized version provides all operations automatically, together with a direct printout of the concentration and indexing. The electrode displays near-Nernstian response for the range 0.05–3.500 ppm chloride and can be used for concentrations as low as 0.02 ppm. Comparative tests and coefficients of variation are highly satisfactory.

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