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Zone fluidics for measurement of octanol-water partition coefficient of drugs
Wattanasin P. - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Zone fluidics for measurement of octanol-water partition coefficient of drugs
ผู้แต่ง / หัวหน้าโครงการ (EN): Wattanasin P.
บทคัดย่อ (EN): A novel zone fluidics (ZF) system for the determination of the octanol-water partition coefficient (Pow) of drugs was developed. The ZF system consisted of a syringe pump with a selection valve, a holding column, a silica capillary flow-cell and an in-line spectrophotometer. Exact microliter volumes of solvents (octanol and phosphate buffer saline) and a solution of the drug, sandwiched between air segments, were sequentially loaded into the vertically aligned holding column. Distribution of the drug between the aqueous and octanol phases occurred by the oscillation movement of the syringe pump piston. Phase separation occurred due to the difference in densities. The liquid zones were then pushed into the detection flow cell. In this method, absorbance measurements in only one of the phase (octanol or aqueous) were employed, which together with the volumes of the solvents and pure drug sample, allowed the calculation of the Pow. The developed system was applied to the determination of the Pow of some common drugs. The log (Pow) values agreed well with a batch method (R2=0.999) and literature (R2=0.997). Standard deviations for intra- and inter-day analyses were both less than 0.1log unit. This ZF system provides a robust and automated method for screening of Pow values in the drug discovery process. © 2014 Elsevier B.V.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เอกสารแนบ (EN): https://www.scopus.com/inward/record.uri?eid=2-s2.0-84922595504&doi=10.1016%2fj.aca.2014.08.025&partnerID=40&md5=bebf3f39e8173ba9f755c6db7a149174
เผยแพร่โดย (EN): มหาวิทยาลัยมหิดล
คำสำคัญ (EN): equipment design
เจ้าของลิขสิทธิ์ (EN): มหาวิทยาลัยมหิดล
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Zone fluidics for measurement of octanol-water partition coefficient of drugs
Wattanasin P.
มหาวิทยาลัยมหิดล
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