Determination of Estazolam in Plasma by High-Performance Liquid Chromatography with Solid-Phase Extraction.

DOI PDF Web Site Web Site Web Site View 1 Remaining Hide 1 Citations 32 References

Search this article

Abstract

A high-performance liquid chromatography (HPLC) assay was developed for the determination of estazolam in human plasma. Estazolam and alprazolam as an internal standard were detected by ultraviolet absorbance at 240 nm. Estazolam in plasma was extracted by a rapid and simple procedure based on cyanopropyl bonded-phase extraction. Chromatographic separation was achieved with a reversed-phase C8-5 column using a mobile phase of 0.5% potassium dihydrogenphosphate(pH 4.5)-acetonitrile (70:30, v/v). The determination of estazolam was possible in the concentration range of 1.0 - 200.0 ng/mL. The mean recovery of estazolam added to plasma was 96.1 ± 1.5% with coefficients of variation of less than 5.5%. This method is applicable for accurately monitoring the plasma level of estazolam in healthy subjects participating in scientific research.

Journal

  • Analytical Sciences

    Analytical Sciences 18 (5), 525-528, 2002

    The Japan Society for Analytical Chemistry

Citations (1)*help

See more

References(32)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top