Monagas Maria, Garrido Ignacio, Lebrón-Aguilar Rosa, Bartolome Begoña, Gómez-Cordovés Carmen
Instituto de Fermentaciones Industriales (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain.
J Agric Food Chem. 2007 Oct 17;55(21):8498-507. doi: 10.1021/jf071780z. Epub 2007 Sep 15.
An exhaustive study of the phenolic composition of almond ( Prunus dulcis (Mill.) D.A. Webb) skins was carried out in order to evaluate their potential application as a functional food ingredient. Using the HPLC-DAD/ESI-MS technique, a total of 33 compounds corresponding to flavanols, flavonols, dihydroflavonols and flavanones, and other nonflavonoid compounds were identified. Peaks corresponding to another 23 structure-related compounds were also detected. MALDI-TOF MS was applied to characterize almond skin proanthocyanidins, revealing the existence of a series of A- and B-type procyanidins and propelargonidins up to heptamers, and A- and B-type prodelphinidins up to hexamers. Flavanols and flavonol glycosides were the most abundant phenolic compounds in almond skins, representing up to 38-57% and 14-35% of the total quantified phenolics, respectively. Due to their antioxidant properties, measured as oxygen-radical absorbance capacity (ORAC) at 0.398-0.500 mmol Trolox/g, almond skins can be considered as a value-added byproduct for elaborating dietary antioxidant ingredients.
为了评估杏仁（Prunus dulcis (Mill.) D.A. Webb）皮作为功能性食品成分的潜在应用，对其酚类成分进行了详尽研究。采用高效液相色谱-二极管阵列检测/电喷雾电离质谱（HPLC-DAD/ESI-MS）技术，共鉴定出33种与黄烷醇、黄酮醇、二氢黄酮醇和黄烷酮相对应的化合物以及其他非黄酮类化合物。还检测到另外23种与结构相关的化合物的峰。应用基质辅助激光解吸电离飞行时间质谱（MALDI-TOF MS）对杏仁皮原花青素进行表征，揭示了一系列直至七聚体的A-型和B-型原花青素以及原花青定，以及直至六聚体的A-型和B-型原翠雀素的存在。黄烷醇和黄酮醇糖苷是杏仁皮中含量最丰富的酚类化合物，分别占总定量酚类的38 - 57%和14 - 35%。由于其抗氧化特性，以0.398 - 0.500 mmol Trolox/g的氧自由基吸收能力（ORAC）来衡量，杏仁皮可被视为用于制备膳食抗氧化成分的增值副产品。
