Method for determining iodine-129 in milk and water

Journal Article · Tue Jan 01 04:00:00 UTC 1974 · Health Phys., v. 26, no. 1, pp. 89-96

DOI:https://doi.org/10.1097/00004032-197401000-00010· OSTI ID:4349937

Gabay, J J; Paperiello, C J; Goodyear, S; Daly, J C; Matuszek, J M

An analytical method for determining sup 129/I in environmental milk and water samples is described. The method depends on the specificity of elemental iodine separation by solvent extaction, followed by liquid scintillation counting of the lowenergy beta emissions from /sup 129/I. Iodine, as iodide, is concentrated by sorption on an anion exchange column and eluted with NaOCl. After reduction to I/sub 2/, the iodine is extracted into CCl/sub 4/, back extracted into water, cleaned by one toluene-water extraction cycle, and finally extracted into toluene. Chemical recovery of the added carrier is determined spectrophotometrically on a small aliquot of the toluene extract. The /sup 129/I concentration is determined by liquid scintillation counting of the toluene solution. Average % recovery of iodine carrier is 74 plus or minus 2 for water 58 plus or minus 3 for raw milk, and 80 plus or minus 4 for pasteurized milk. Analytical sensitivity is 0.3 pCi /sup 129/I/l. for a 4 -- 1. sample. (auth)

• Research Organization: New York State Dept. of Health, Albany
• NSA Number: NSA-29-015316
• OSTI ID: 4349937
• Journal Information: Health Phys., v. 26, no. 1, pp. 89-96, Journal Name: Health Phys., v. 26, no. 1, pp. 89-96; ISSN HLTPA
• Country of Publication: United Kingdom
• Language: English

Related Subjects

*IODINE 129-- RADIOCHEMICAL ANALYSIS
*MILK-- RADIOCHEMICAL ANALYSIS
*WATER-- RADIOCHEMICAL ANALYSIS
COUNTING TECHNIQUES
N40130* --Chemistry--Analytical & Separations Chemistry-- Radiometric & Radiochemical Procedures
N44340 --Environmental & Earth Sciences--Radioactivity Monitoring & Transport--Ecosystems & Food Cycles
QUANTITATIVE CHEMICAL ANALYSIS
RADIATION MONITORING
SENSITIVITY
SOLVENT EXTRACTION