Abstract
OBJECTIVE: The purpose of this study was to evaluate and improve a high performance liquid chromatography (HPLC) methodology to determine urinary δ-aminolevulinic acid (ALA-U) with small volumes of sample. METHOD: The method was based on the formation of a fluorescent compound and subsequent 15-minute chromatographic run. RESULTS: The method shows suitable linearity, precision and recovery. Urine samples showed 1.2 ± 0.9 mg/l (media ± standard deviation) of ALA-U. CONCLUSION: The method was considered suitable for the routine analysis of ALA-U.
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