Identification and Quantitation of the Lipation Product 2-Amino-6-(3-methylpyridin-1-ium-1-yl)hexanoic Acid (MP-Lysine) in Peanuts
作者:Martin Globisch、Meike Deuber、Thomas Henle
DOI:10.1021/acs.jafc.6b03371
日期:2016.8.31
pyridinium derivative 2-acetamido-6-(3-methylpyridin-1-ium-1-yl)hexanoic acid (MP-acetyl lysine) was identified. In addition, the lysine derivative 2-amino-6-[5-(hydroxymethyl)-3,6-dihydro-2H-pyridin-1-yl]hexanoic acid was identified after reduction and hydrolysis. After preparation of 2-amino-6-(3-methylpyridin-1-ium-1-yl)hexanoic acid (MP-lysine) as reference material, its amounts were quantitated in acrolein-modified
脂质过氧化产物丙烯醛分别通过GC-MS(EI)在未加热和加热的花生油中进行半定量,代表了花生焙烧的模型系统。取决于加热时间,丙烯醛含量从0.2毫克/千克油显着增加到10.7毫克/千克油。作为加热的结果Ñ α -乙酰基-升-赖氨酸和丙烯醛,吡啶鎓衍生物2-乙酰氨基-6-(3-甲基-吡啶-1-鎓-1-基)己酸(MP乙酰基赖氨酸)被鉴定。此外,赖氨酸衍生物2-氨基-6- [5-(羟甲基)-3,6-二氢-2 H还原和水解后鉴定出-吡啶-1-基]己酸。制备2-氨基-6-(3-甲基吡啶-1-基-1-基)己酸(MP-赖氨酸)作为参考材料后,通过HPLC-ESI-MS /在丙烯醛修饰的花生蛋白中定量其量酸水解后的质谱,表明在低丙烯醛浓度下,赖氨酸的修饰可以完全由MP-赖氨酸的形成来解释。此外,首次在花生样品中对MP-赖氨酸的含量进行了定量,最高可达10.2 mg / kg,这取决于烘烤时间的增加。因此,M