New Columnar and Mixed-Bed Ion Exchange Methods for Surfactant Analysis and Purification

Abstract

together with the precipitation of the rare earth oxinates with the lanthanum carrier is at least 97% (S). Because the recovery in either the double oxalate or fluoride precipitation was essentially 100%, the over-all recovery of the rare earths should be about 97%.This value was checked by analyzing duplicate 10-gram samples of beryllium to which was added europium-152-154 after dissolution. An average 98% recovery of the tracer activity was found in the final oxide residue. With larger 28-gram samples, the recovery was 96%.With 40-gram samples of magnesium, the recovery was 96%.Tracer recovery tests were also carried out on duplicate 5-gram samples of zirconium, titanium, uranium, and stainless steel. In the case of uranium, the blank activity of any gammaemitters in the final residue was determined first by carrying an identical sample through the procedure without the tracer addition. The blank was small enough to be ignored. In each case, the recovery of the tracer in the final residues for the spectrographic analysis was at least 97%. LITERATURE CITED(1) Gordon, Louis, Firsching, F. H.,

Use of Ion Exchange Resins in the Adsorption and Elution of Association Colloids

“…The CMC is a function of alcohol concentration (17,18) and is, in fact, inversely proportional a t lower alcohol concentrations. This explains the necessity for alcoholic eluants in the analysis of detergents and shampoos (2)(3)(4)(5)(6). Kewburger (2) found that alkyl sulfates when adsorbed onto weakly basic ion exchange resins could not be eluted by (1 f 9) ammonium hydroxide, dilute hydrochloric acid, ethyl alcohol, or an aqueous solution of ammonium hydroxide and ammonium carbonate.…”

A General Method for the Chromatographic Separation of Nonionic Surface-Active Agents and Related Materials.

“…The authors acknowledge the information provided by Charles Keith regarding his preliminary attempts to use purine complexation for the countercurrent separation of closely-related polycyclic aromatic hydrocarbons. LITERATURE CITED (1) Biltz, H., Strufe, K., Ann. 413,197 (1916).…”

“…These compositions often contain both water-soluble and oil-soluble surfactants to obtain a better balance of properties, and in addition, usually contain other nonionic, nonsurfaceactive materials, such as hydrocarbon oils, fatty esters, glycols, and unreacted raw materials from surfactant manufacture. The removal of ionic surfaceactive agents present in the composition is conveniently accomplished by ion exchange (1,7,8,10,12), but all the nonionic surfactants, together with any nonionic nonsurfactant material, pass unadsorbed through the ion exchanger. The analysis of this mixture of nonionic surfactants and related materials is usually a difficult task and, in spite of its common occurrence, only a few attempts have been made to systematize the analysis of this type of mixture.…”

“…Accepted September 18, 1963. Separation and Determination of Iron(ll) and Iron(lll) with Anthranilic Acid Using Solvent Extraction and Spectrophotometry DONALD L. DINSEL1 and THOMAS R. SWEET Department of Chemistry, McPherson Chemical Laboratory, The Ohio State University, Columbus 10, Ohio Iron(lll) was extracted as the anthranilate into 1 -pentanol in the presence of iron(ll). A direct determination of the iron(lll) content of the sample was obtained by measuring the absorbance of the pentanol extract.…”

“…A direct determination of the iron(ll) content of the sample was obtained by measuring the absorbance of the nonaqueous phase. Anthranilic acid was first prepared by Fritsche in 1841 (2) and was proposed as an analytical reagent in 1926 (1,8). Two publications cite the use of anthranilic acid as a reagent for solvent extraction separations (6, 9), specifically, for the separation and determination of plutonium by extraction with amyl acetate.…”