Iron ores. Determination of water-soluble chloride content. Ion-selective electrode method

2007 ◽  
Keyword(s):  
Chloride Content ◽  
Water Soluble ◽  
Ion Selective Electrode ◽  
Iron Ores ◽  
Selective Electrode ◽  
Electrode Method

Determination of fluoride with an ion-selective electrode in the presence of water-soluble organic substances

The Analyst ◽  
1990 ◽  
Vol 115 (8) ◽  
pp. 1093 ◽  
Author(s):  
Augusto C�sar C. Spadaro ◽  
Doralysa N. Carlomagno ◽  
Ana Cristina M. Polizello
Keyword(s):  
Water Soluble ◽  
Ion Selective Electrode ◽  
Organic Substances ◽  
Selective Electrode

Collaborative Study of Ion Selective Electrode Method for the Direct Determination of Fluoride in Feeds

1975 ◽  
Vol 58 (3) ◽  
pp. 477-481 ◽  
Author(s):  
Laszlo Torma
Keyword(s):  
Standard Deviation ◽  
Collaborative Study ◽  
Direct Determination ◽  
Ion Selective Electrode ◽  
Official Method ◽  
Selective Electrode ◽  
Standard Curve ◽  
Electrode Method ◽  
Aoac Method

Abstract A rapid and precise method for the determination of fluoride in feeds employs HC1 extraction of the sample. Acetate buffer and sodium citrate are added to control pH and ionic strength. The amount of fluoride is calculated from a standard curve after measuring the potentials of standard and sample solutions. Eight collaborators participated in the study of the method. Statistical values on 3 pairs of samples were calculated. The standard deviation, precision, coefficient of variation, and bias, respectively, were: Pair 1, 0.005071, 0.001763, 3.09, 0.0034; Pair 2, 0.037122, 0.006475, 1.82, 0.0258; Pair 3, 0.034587, 0.013021, 2.63, 0.0227. The results from the proposed method agreed favorably with the values obtained by using the official final action AOAC method, 7.089. The average and standard deviation, respectively, for individual samples by the proposed method were: Sample 3, 0.049, 0.0029; Sample 4, 0.059, 0.0021; Sample 5, 0.334, 0.0114; Sample 6, 0.341, 0.0101; Sample 7, 0.511, 0.0219; Sample 8, 0.492, 0.0237. By the official method the values were: Sample 3, 0.049, 0.0041; Sample 4, 0.058, 0.0029; Sample 5, 0.334, 0.0055; Sample 6, 0.331, 0.0082; Sample 7, 0.517, 0.0183; Sample 8, 0.499, 0.0175. The ion selective electrode method has been adopted as official first action.

scholarly journals Ion-selective Electrode Method for the Determination of Sodium Chloride in Akawi Cheese and in Brine

1987 ◽  
Vol 56 (1-2) ◽  
pp. 151-155 ◽  
Author(s):  
E. Šucman ◽  
Jaroslava Vavřinová ◽  
O. Synek ◽  
J. Sedlařík
Keyword(s):  
Sodium Chloride ◽  
Ion Selective Electrode ◽  
Selective Electrode ◽  
Electrode Method

Determination of calcium in foodstuffs by ion selective electrode method.

1986 ◽  
Vol 35 (5) ◽  
pp. 494-496 ◽  
Author(s):  
Keiko YOKOFUJITA ◽  
Kazuyoshi TAKIYAMA
Keyword(s):  
Ion Selective Electrode ◽  
Selective Electrode ◽  
Electrode Method
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