THE APPLICABILITY OF THE ISOHYDRIC PRINCIPLE TO TENTH-NORMAL MIXTURES OF HYDROCHLORIC ACID AND POTASSIUM CHLORIDE.1

1917 ◽  
Vol 39 (6) ◽  
pp. 1133-1139 ◽  
Author(s):  
N. Edward Loomis ◽  
J. L. Essex ◽  
Merle R. Meacham
Keyword(s):  
Hydrochloric Acid ◽  
Potassium Chloride ◽  
Normal Mixtures

Polarographic Determination of Niacinamide in Multivitamin Preparations

1974 ◽  
Vol 57 (4) ◽  
pp. 910-913
Author(s):  
Albert Y Taira
Keyword(s):  
Hydrochloric Acid ◽  
Sodium Bicarbonate ◽  
Potassium Chloride ◽  
Chloride Solution ◽  
Mercury Electrode ◽  
Sodium Bicarbonate Solution ◽  
Potassium Chloride Solution ◽  
Microbiological Methods ◽  
Dropping Mercury Electrode

Abstract Niacinamide is extracted from multivitamin preparations with sodium bicarbonate solution. The extract is mixed with Celite and packed into a chromatographic column. The vitamin is eluted with 10% re-propanol in ether and the eluate is evaporated to dryness in the presence of hydrochloric acid. The residue is dissolved in potassium chloride solution and diluted to volume. The polarogram, from –1.40 to –1.90 v, is recorded on a polarograph equipped with a dropping mercury electrode and an H-cell with a saturated calomel reference cell. Additional assays with chemical and microbiological methods showed comparable results. The method is sensitive to 2 mg niacinamide.

Accurate surface tension and charge determinations from polarographic drop-times

1967 ◽  
Vol 45 (2) ◽  
pp. 109-116 ◽  
Author(s):  
R. G. Barradas ◽  
F. M. Kimmerle
Keyword(s):  
Mathematical Method ◽  
Surface Tension ◽  
Hydrochloric Acid ◽  
Potassium Chloride ◽  
Precise Determination ◽  
Surface Tension Data ◽  
Surface Active ◽  
Mercury Electrodes ◽  
Surface Active Compounds

The precise determination of drop-times for micropolarographic mercury electrodes in aqueous inorganic electrolytes with and without the addition of organic surface-active compounds is described. A dependable mathematical method for conversion of drop-times to accurate surface tension data and the use of IBM computer techniques for the calculation of double layer parameters are discussed. Experimental results for hydrochloric acid, potassium chloride, and furfurylamine systems are reported.

The Activity Coefficient of Hydrochloric Acid in Potassium Chloride Solutions

1958 ◽  
Vol 62 (5) ◽  
pp. 627-629 ◽  
Author(s):  
Herbert S. Harned ◽  
A. B. Gancy
Keyword(s):  
Hydrochloric Acid ◽  
Activity Coefficient ◽  
Potassium Chloride ◽  
Chloride Solutions
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