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  • 1 USDA, ARS Grand Forks Human Nutrition Research Center 58202 Grand Forks ND USA
  • | 2 University of North Dakota Department of Physics 58202 Grand Forks ND USA
  • | 3 Brookhaven National Laboratory/RTF Medical Department 11973 Upton NY USA
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The Library Least Squares method was adapted for use on a standard personal computer. It was found to be considerably more sensitive than the window method in the accurate assessment of65Zn and40K simultaneously presented in human urine samples.