potassium 42

po·tas·si·um 42 (42K),

(pō-tas'ē-ŭm),
An artificial potassium isotope; beta emitter with half-life of 12.36 hr, used as a tracer in studies of potassium distribution in body fluid compartments and in localization of brain tumors.
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Hitachi 737 n Control (a) Treated (a) Sodium 40 150 (2.3) 148 (1.1) (b) Potassium 42 11.8 (0.23) 11.8 (0.44) Chloride 39 125 (2.3) 122 (0.7) (b) Urea 35 10.55 (0.27) 10.21 (0.32) Creatinine 35 0.11 (0.004) 0.11 (0.004) Hitachi 911 Control (a) Treated (a) Sodium 132 (20.8) 147 (1.9) (b, c) Potassium 10.6 (1.97) 11.7 (0.22) (b, c) Chloride Urea 9.94 (0.25) 9.79 (0.20) Creatinine 0.10 (0.004) 0.10 (0.007) (a) Mean (SD of duplicates), mmol/L.