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The isolation and determination of the soluble organic substances in sea water is very difficult because of the presence of large amounts of inorganic salts. In order to desalt the water, ion retardation with Retardion 11A8 seems to be a very efficient method. Since this procedure is at the present almost unknown, the optimal conditions of separation which have been found are described in this paper. The selectivity of the resin for different ions occurring in sea water is studied. The elution curves of a large number of organic substances (amino acids, carbohydrates, organic phosphorus compounds and organic acids) are described. Recovery of given concentrations of these substances, added to 50 ml of a salt solution similar to sea water, is 95 to 100% for most of the amino acids, carbohydrates and organic phosphorus compounds but less for other substances. Using ion retardation as a desalting means, more than 90% of the inorganic salts may be removed from the “organic fraction” by a one-step procedure. These experiments may be done on a larger scale in desalting larger volumes of sea water. Ion retardation has proved to be an excellent separation method for biochemistry and water chemistry. Work is in progress to use Retardion 11A8 as a desalting means in the isolation of organic matter from sea water.

Beiträge zur Entsalzung mit Retardion 11A8