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A Novel Method to Determine the Longitudinal Antibacterial Activity of Drug-Eluting Materials

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Sample cleanup using solid-phase dispersive extraction for determination of vancomycin in serum.

Yasuhiro Sakamoto¹, Yuki Jinno, Ikumi Shinodzuka

¹Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University.

Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry

|February 14, 2014

Summary

This summary is machine-generated.

A new solid-phase dispersive extraction (SPDE) method offers a faster way to measure vancomycin (VCM) in serum using liquid chromatography/mass-spectrometry (LC/MS). This technique effectively removes proteins without pre-treatment, proving useful for VCM determination.

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Area of Science:

Analytical Chemistry
Biochemistry

Background:

Accurate determination of vancomycin (VCM) in serum is crucial for therapeutic drug monitoring.
Conventional solid-phase extraction (SPE) methods can be time-consuming and may require extensive sample pre-treatment.

Purpose of the Study:

To investigate the efficacy of solid-phase dispersive extraction (SPDE) as a rapid cleanup method for vancomycin (VCM) determination in serum.
To evaluate the performance of SPDE coupled with liquid chromatography/mass-spectrometry (LC/MS) for VCM analysis.

Main Methods:

Solid-phase dispersive extraction (SPDE) was employed for sample cleanup.
Liquid chromatography/mass-spectrometry (LC/MS) was used for vancomycin quantification.
Analysis of viscous serum samples, including assessment of protein removal without prior deproteinization.

Main Results:

SPDE demonstrated faster extraction times compared to conventional SPE.
Effective protein removal from serum was achieved with SPDE, simplifying sample preparation.
The method achieved a limit of detection of 0.05 ng/mL and a limit of quantification of 0.2 ng/mL for VCM.
High average recoveries (90.0-98.6%) and good precision (repeatability and intermediate precision) were obtained.

Conclusions:

The developed analytical method combining SPDE and LC/MS is a rapid, efficient, and reliable technique for vancomycin determination in serum.
SPDE offers advantages for analyzing complex biological matrices like serum, reducing sample preparation steps.
This method is suitable for routine clinical laboratory analysis of vancomycin levels.