参考文献:10.1007/s10545-007-0767-8 摘要:Wittmann G, Karg E, Mühl A, Bodamer OA, Túri S. Comparison of tetrahydrofuran and ethyl acetate as extraction solvents for urinary organic acid analysis. J Inherit Metab Dis. 2008 Feb;31(1):73–80. doi: 10.1007/s10545-007-0767-8.