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The enzymatic method for isolation and determination of urinary polyamines was modified to measure the polyamines in the blood. High recovery rates of polyamine in blood by enzymatic hydrolyzation were obtained, namely, 101.9 +/- 4.4% for diamine, 96.0 +/- 5.4% for spermidine and 104.1 +/- 3.3% for spermine. Furthermore excellent linearity was demonstrated. Within-run precision of polyamine in blood was excellent, namely, in C.V., 1.15% for Reaction 1, 2.11% for Reaction 2 and 2.79% for Reaction 3. This method was compared with high pressure liquid chromatography (HPLC), and a close correlation was demonstrated for all the fractions: diamine r = 0.8824, y = 1.367x+0.0417 (n = 15); spermidine r = 0.9878, y = 0.806x+5.218 (n = 15); spermine r = 0.9764, y = 1.068x-0.9195 (n = 15).
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