Abstract
ABSTRACTThe detection and quantification of biomarkers have gained more attention in the medical discipline to evaluating disease progression to manage medical treatment. Biomarkers range from gases to biological macromolecules. Because of the nanomolar range levels of typical biomarkers in plasma, blood, urine, exhalation samples, and other biological fluids as well as complex matrix of biological media, adequate sample preparation methods should be used for quantification of biomarkers. Biomarkers are discussed here generally classified mainly into two subgroups which arisen from disease or exposure compounds. The analytical method is critical for the validity/reliability of a biomarker. Accuracy, precision, reproducibility, recovery, sensitivity, and specificity all have high influence to the consistency with the limit and reference values concerned. In this paper, developments in well-established liquid-phase microextraction techniques for the clinical analysis of biological samples will be reviewed and discussed. This article presents an overview of microextraction methods for biological samples, focusing especially on biomarkers.
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