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Gas chromatographic/mass spectrometric identification of 3-hydroxydicarboxylic acids in urine
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Metabolic profiling of urinary organic acids by single and multicolumn capillary gas chromatography
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Determination of pipecolic acid in serum or plasma by solid-phase extraction and isotope dilution mass spectrometry
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Solid-phase extraction with strong anion-exchange columns for selective isolation and concentration of urinary organic acids
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Automated profiling of urinary organic acids by dual-column gas chromatography and gas chromatography/mass spectrometry