Determination of phenobarbital, p-hydroxyphenobarbital and phenobarbital-N-glucoside in urine by gas chromatography chemical ionization mass spectrometry.

@article{Tang1984DeterminationOP,
  title={Determination of phenobarbital, p-hydroxyphenobarbital and phenobarbital-N-glucoside in urine by gas chromatography chemical ionization mass spectrometry.},
  author={B. K. Tang and Bayram Yilmaz and Werner Kalow},
  journal={Biomedical mass spectrometry},
  year={1984},
  volume={11 9},
  pages={462-5}
}
A sensitive and efficient analytical procedure was developed to determine phenobarbital-N-glucoside, phenobarbital and p-hydroxyphenobarbital in urine. The stable-isotope labeled internal standards used in this assay were obtained in urine from a subject who ingested 15N-labeled phenobarbital.