Return-Receipt-To: "DON E. BROWN" <dbrown@labb.tdh.state.tx.us>
The urine matrix can be eliminated by performing a cyclohexane-water
azeotropic distillation before counting.
Don Brown
Texas Department of Health
Bureau of Laboratories
Nuclear Chemistry Branch
512-458-7587
DBROWN@LABB.TDH.STATE.TX.US