High-Performance Liquid Chromatographic Determination of 2-Alkenals in Oxidized Lipid as Their 7-Amino-6-methylquinoline Derivatives.
作者:Teruhisa HIRAYAMA、Shinji MIURA、Yasuo MORI、Midori UETA、Eri TAGAMI、Tomoko YOSHIZAWA、Tetsushi WATANABE
DOI:10.1248/cpb.39.1253
日期:——
High-performance liquid chromatographic determination of several 2-alkenals, specially acrolein, crotonaldehyde, 2-pentenal, 2-hexenal, 2-heptenal, 2-octenal and 2-nonenal, were studied using the precolumn derivatization reagent 2, 4-diaminotoluene. After the selective condensation of these 2-alkenals to form fluorescent 7-amino-6-methylquinoline derivatives, separation of these compounds was achieved on a ODS column (150×4 mm i.d.) with a linear gradient system of acetonitrile and 50 mM mono-ammonium phosphate containing 5 mM sodium 1-octanesulfonate (from 20% acetonitrile to 60% acetonitrile in 1 h), and the separated quinoline derivatives were detected with a fluorescence monitor (396 nm for excitation and 485 nm for emission). There autooxidized unsaturated fatty acid methyl esters and five autooxidized edible oils were subsequently assayed for acrolein (C3), crotonaldehyde (C4), 2-pentenal (C5), 2-heptenal (C7), 2-octenal (C8) and 2-nonenal (C9). The peak of 2-hexenal was interfered with the unknown peak derived from oxidized lipids. Their detection limits (S/N=2) were 10, 10, 25, 25, 50, 50 pg for acrolein, crotonaldehyde, 2-pentenal, 2-heptenal, 2-octenal and 2-nonenal, respectively.
使用柱前衍生试剂2,4-二氨基甲苯对几种2-烯醛(特别是丙烯醛、巴豆醛、2-戊烯醛、2-己烯醛、2-庚烯醛、2-辛烯醛和2-壬烯醛)进行高效液相色谱测定。将这些2-烯醛选择性缩合形成荧光7-氨基-6-甲基喹啉衍生物后,在ODS柱(150×4 mm i.d.)上用乙腈和50 mM磷酸一铵(含5 mM 1-辛烷磺酸钠)的线性梯度系统(1小时内从20%乙腈升至60%乙腈)