What question did this study set out to answer?

This research aims to address analytical challenges in measuring unbound flucloxacillin (FLU) using advanced methods.

March 12, 2026

Addressing Analytical Challenges to Improve Laboratory Consistency in Unbound Flucloxacillin Measurement

Key Points

This research aims to address analytical challenges in measuring unbound flucloxacillin (FLU) using advanced methods.
Developed an LC-HRMS method for quantifying unbound FLU
Conducted cross-validation to assess consistency across laboratories
Investigated the effects of UF parameters, such as device type and temperature
Recommended plasma matrix storage for improved sample stability.
Achieved comparable FLU measurement results across laboratories with harmonized UF parameters
Found that unbound FLU stability is limited in ultrafiltrate
Recommended use of a plasma matrix for better sample storage and stability.

Abstract

A validated LC-HRMS method for quantifying unbound FLU was developed using UF. Cross-validation showed that comparable results can be achieved across laboratories when key UF parameters, such as device type and temperature, are harmonized. Because of the limited stability of FLU in ultrafiltrate, sample storage in plasma matrix is recommended.

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Cite This Study

herteryck et al. (Tue,) studied this question.

synapsesocial.com/papers/69b25b5496eeacc4fcec9fa8 https://doi.org/https://doi.org/10.1097/ftd.0000000000001449

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