[Determination of morphine in compound liquorice tablets by high performance liquid chromatography with SEP-PAK C18 cartridge pretreatment].

@article{Wang1998DeterminationOM,
  title={[Determination of morphine in compound liquorice tablets by high performance liquid chromatography with SEP-PAK C18 cartridge pretreatment].},
  author={Yi-Xiang Wang and Jian-qing Zeng},
  journal={Se pu = Chinese journal of chromatography},
  year={1998},
  volume={16 3},
  pages={229-31}
}
An efficient method combining SEP-PAK C18 cartridge solid phase extraction (SPE) with reversed-phase high performance liquid chromatography for the quantitation of morphine in the Compound Liquorice Tablet is presented. The tablets have been used for making expectoration easy and relieving cough for years. The tablet powder (approximately 1 tablet) was added into a stoppered centrifuge tube, and vertically extracted with 5 mL of 0.5% HAc for 5 min. After centrifugation the supernatant was… CONTINUE READING