Fig. 2A±C Absence of decay in toluene concentration as determined in the urine samples stored at 4 °C. Vertical arrows show SD ranges. The toluene concentration in acetonitrile-urine mixture was A 41.0, B 77.9, and C 285.6 lg./l, respectively
Fig. 2A±C Absence of decay in toluene concentration as determinedin the urine samples stored at 4 °C. Vertical arrows show SD ranges.The toluene concentration in acetonitrile-urine mixture was A 41.0,B 77.9, and C 285.6 lg./l, respectively