Determination of chloride ions in concentrated sulphuric acid with a chloride ion-selective electrode

The Analyst ◽  
1982 ◽  
Vol 107 (1281) ◽  
pp. 1510 ◽  
Author(s):  
Kenny D. Brown ◽  
Gordon A. Parker
1978 ◽  
Vol 61 (6) ◽  
pp. 1493-1495 ◽  
Author(s):  
Ivan Sekerka ◽  
Josef F Lechner

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.


2009 ◽  
Vol 42 (17) ◽  
pp. 2928-2936 ◽  
Author(s):  
Zenovia Moldovan ◽  
Sultana Niţă ◽  
Cristina Bozdoacă ◽  
Andrei A. Bunaciu ◽  
Hassan Y. Aboul-Enein

1972 ◽  
Vol 67 (2) ◽  
pp. 146-150
Author(s):  
Akira TOTSUKA ◽  
Matsuo TOBA ◽  
Yasunosuke NAMBA ◽  
Yasuyuki KOMUYAMA

1981 ◽  
Vol 46 (2) ◽  
pp. 368-376 ◽  
Author(s):  
Josef Veselý

Titration of sulphates with lead perchlorate employing lead ion selective electrode indication was studied using additions of various organic solvents at different pH' and ionic strength values. As the optimum emerged systems with 60-70% 1,4-dioxane, pH' 5.3-5.6. After dehydration with sodium hydroxide, dioxane must be freed from the electrode surface-oxidizing impurities by their reduction with sodium metal and subsequent distillation. The method was applied to determination of sulphates in mountain spring waters. Units of ppm can be determined; the limit of determination, however, depends considerably on the content of dioxane, total salt content in the sample, and speed of the semi-automatic titration. Lead can be determined with EDTA in concentrations down to c(Pb2+) = 5 . 10-6 mol l-1.


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