Sorption Characteristics and Chromatographic Separation of ⁹⁰Y³⁺ from ⁹⁰Sr²⁺ from Aqueous Media by Chelex-100 (Anion Ion Exchange) Packed Column

Table 1

Influence of the extraction media (acetic acid, citric acid, DTPA, EDTA and NaCl), and the solution pH on the distribution ratio () of Y³⁺ and Sr²⁺ towards retention onto Chelex 100 (anion form)^†.

pH	Compound
	Acetic acid		Citric acid		DTPA		EDTA		NaCl
	Y^3+	Sr^2+	Y^3+	Sr^2+	Y^3+	Sr^2+	Y^3+	Sr^2+	Y^3+	Sr^2+
pH 1–pH 3	9930 ± 12.4	0.0	9886 ± 5.8	0.0	7004 ± 3.3	0.0	9905 ± 5.4	0.0	12278 ± 13.8	66654 ± 5.7
pH 4-pH5	9927.7 ± 9.3	0.0	123.5 ± 4.7	0.0	20.4 ± 2.9	0.0	7.3 ± 0.21	4.3 ± 2.5	12273 ± 10.4	4734 ± 12
pH 7	9924 ± 11.3	3924.4 ± 11.3	125.8 ± 5.7	2012.6 ± 3.7	20.4 ± 2.9	2000 ± 2.2	0.0	4.3 ± 0.2	12275 ± 15.1	1154 ± 5.1
pH 9	4027 ± 7.5	9120 ± 12.4	0.0	9654 ± 5.7	20.4 ± 2.1	1734 ± 2.2	0.0	4123 ± 2.3	1027 ± 9.5	12276 ± 5.7
pH 11	100.7 ± 3.7	7212.2 ± 5.8	0.0	9759 ± 5.7	0.0	1614.5 ± 5.2	0.0	3623 ± 3.7	11452 ± 9.5	12276 ± 5.7

^†The concentration of acetic acid, citric acid, DTPA, EDTA, or NaCl is equal to 1.0 × 10⁻³ M.