Study of the Interfacial Properties of Water by Gas Chromatography.
Abstract
A summary of work on the interfacial properties of water by gas chromatography is presented. In this method the retention of nonelectrolytes is measured; for some solutes only adsorption at the gas-liquid interface occurs whereas for others both adsorption and partition simultaneously take place. The results indicate that bulk water is a low energy surface to hydrocarbons. It is also shown for the first time that there is a formation of hydrogen bond interactions between water surface molecules and Bronsted bases. In terms of partition, the results indicate that water coated in thin layers on wide-pore silica is similar to bulk water in its solvent properties. Also presented are results on the interfacial properties of sodium chloride solutions. In general, the adsorption coefficient of nonelectrolytes increases as NaCl concentration increases. However, a definite minimum in adsorption coefficient for many solutes is found at 0.50 molal NaCl. Also measured were salting-out constants. The study has developed gas chromatography to the point that it can be successfully used in the study of electrolyte solutions. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1973
- Accession Number
- AD0761655
Entities
People
- Barry L. Karger
Organizations
- Northeastern University