Laboratory applications of ion exchange techniques.

Tompkins, Edward R.

doi:10.1021/ed026p32

Cited by 28 publications

(4 citation statements)

References 8 publications

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“…Tompkins (11,12) and Mayer ( 8) have shown that the number of column volumes, F, which have passed through the column when the peak of the elution curve is reached is numerically equal to the distribution, C, between the solution and the resin (Fmax. = C).…”

Section: Resultsmentioning

confidence: 99%

Adsorption of Elements from Hydrofluoric Acid by Anion Exchange

Faris¹

1960

Anal. Chem.

180

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hydroxylamine and hydroxamates in mixtures, as outlined in this paper, is based on the fact that hydroxylamine gives a color reaction by Blom's method, both at pH 2.3 and 3.7, and the hydroxamates react only at pH 3.7. Because nitrite, the oxidation product of the two substances, gives full color at both pH values, it follows that hydroxamate can only be oxidized by iodine to nitrite under less acid conditions. Therefore, to obtain a quantitative oxidation of the hydroxamate, it is essential to secure and maintain a pH of 3.7 for the duration of the oxidation reaction.

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Section: Resultsmentioning

confidence: 99%

Adsorption of Elements from Hydrofluoric Acid by Anion Exchange

Faris¹

1960

Anal. Chem.

180

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“…This method of testing is termed the "break-through" or displacement technique and is based on the widely different adsorptive properties of ions in solutions. The point at which ion Bã ppears in the effluent is considered as end point in calculations of the breakthrough capacity (7). When the effluent concentration of B~is equal to that of the influent, the resin is said to be saturated with respect to B~.…”

Section: Preparation Of Solutionsmentioning

confidence: 99%

Ion Exchange Separation of Uranium from Thorium

Poirier¹,

Calkins²,

Lutz³

et al. 1958

Ind. Eng. Chem.

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“…In preparation for fractionation of hop extracts on IRA 400, elution constants were determined by the method described by Tompkins (12) from batch equilibrations in 0.2A' solutions of various acids in methanol. The distribution values, Kd, for lupulone and humulone complex, respectively, were as follows: acetic acid, 100 and 942; formic acid, 24 and 67; chloroacetic acid, 21 and 30; and malonic acid, 20 and 22.…”

Section: Molecularmentioning

confidence: 99%