Analysis of radioactive strontium-90 in food by Čerenkov liquid scintillation counting.
A simple liquid scintillation counting method using DGA/TRU resins for removal of matrix/radiometric interferences, Čerenkov counting for measuring90Y, and EDXRF for quantifying Y recovery was validated for analyzing90Sr in various foods. Analysis of samples containing energetic β emitters required using TRU resin to avoid false detection and positive bias. Additional 34% increase in Y recovery was obtained by stirring the resin while eluting Y with H2C2O4. The method showed acceptable accuracy (±10%), precision (10%), and detectability (~0.09Bqkg-1).
Winchester Engineering and Analytical Center, Food and Drug Administration, 109 Holton Street, Winchester, MA 01890 USA.
Jingjing
J
Pan
Winchester Engineering and Analytical Center, Food and Drug Administration, 109 Holton Street, Winchester, MA 01890 USA.
Kathryn
K
Emanuele
Winchester Engineering and Analytical Center, Food and Drug Administration, 109 Holton Street, Winchester, MA 01890 USA.
Eileen
E
Maher
Winchester Engineering and Analytical Center, Food and Drug Administration, 109 Holton Street, Winchester, MA 01890 USA. Electronic address: zhichao.lin@fda.hhs.gov.
Zhichao
Z
Lin
Winchester Engineering and Analytical Center, Food and Drug Administration, 109 Holton Street, Winchester, MA 01890 USA.
Stephanie
S
Healey
Winchester Engineering and Analytical Center, Food and Drug Administration, 109 Holton Street, Winchester, MA 01890 USA.
Patrick
P
Regan
D002138:Calibration; D005507:Food Contamination, Radioactive / Q000032:analysis*; D059022:Food Safety; D006801:Humans; D012117:Resins, Synthetic; D012588:Scintillation Counting / Q000379:methods* / Q000706:statistics & numerical data; D013326:Strontium Radioisotopes / Q000032:analysis* / Q000302:isolation & purification; D015021:Yttrium Radioisotopes / Q000032:analysis / Q000302:isolation & purification
D012117:Resins, Synthetic; D013326:Strontium Radioisotopes; D015021:Yttrium Radioisotopes; C000615496:Yttrium-90; C000615490:Strontium-90
Emergency response; Extraction resin; Food contamination; Radioactive strontium; Čerenkov LSC