| 摘要 |
The concentration of vanilmandelic acid in urine is determined by contacting a measured urine sample with an anion exchange resin to adsorb contained vanilmandelic acid, washing residual urine from the resin, desorbing vanilmandelic acid from the resin, diazotizing the desorbed vanilmandelic acid, extracting the diazotized vanilmandelic acid from the diazotization reaction mixture with cyclohexanone, determining the absorbance of about 590 mu light by the extract and determining vanilmandelic acid content of the extract by comparing the absorbance of the extract with the absorbance of solutions having known contents of vanilmandelic acid.
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