Separation of Chlorogenic Acids and Caffeine on a Diasfer-110-C10CN Stationary Phase

IF 1 4区 化学 Q4 CHEMISTRY, ANALYTICAL
V. I. Deineka, E. Yu. Oleinits,  Kh. M. Kul’tid Kabrera, L. A. Deineka
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Abstract

It is shown that a transition from traditional C18 (I) stationary phases with non-polar endcapping to the C10CN (II) phase, containing terminal polar groups, leads to a change in selectivity comparable to an increase in the activity of residual silanol groups in phases I. The effect was detected in the separation of isomeric monocaffeoylquinic acids. Two versions of the gradient mode are proposed using a Diasfer-110-C10CN column and water–acetonitrile components of the mobile phase acidified with H3PO4 for the separation of chlorogenic acids and caffeine in green coffee extracts from different manufacturers. It was shown that the proposed chromatographic method can also be used to determine trigonelline, the retention of which significantly increased in replacing phase I with phase II. The proposed method was used to differentiate the fruits of two types of coffee—Arabica and Robusta. It was found that the total amount of chlorogenic acids and caffeine is higher in Robusta coffee extracts.

Abstract Image

在 Diasfer-110-C10CN 固定相上分离绿原酸和咖啡因
研究表明,从带有非极性末端封端的传统 C18 (I) 固定相过渡到含有末端极性基团的 C10CN (II) 相,会导致选择性发生变化,其程度与 I 相中残留硅烷醇基团活性的增加相当。使用 Diasfer-110-C10CN 色谱柱和以 H3PO4 酸化的水-乙腈为流动相,提出了两种梯度模式,用于分离不同厂家生产的绿咖啡提取物中的绿原酸和咖啡因。结果表明,所提出的色谱法也可用于测定三尖杉酯碱,用第二相代替第一相后,三尖杉酯碱的保留率显著提高。建议的方法被用于区分两种咖啡果实--阿拉伯咖啡和罗布斯塔咖啡。研究发现,罗布斯塔咖啡提取物中绿原酸和咖啡因的总量较高。
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来源期刊
Journal of Analytical Chemistry
Journal of Analytical Chemistry 化学-分析化学
CiteScore
2.10
自引率
9.10%
发文量
146
审稿时长
13 months
期刊介绍: The Journal of Analytical Chemistry is an international peer reviewed journal that covers theoretical and applied aspects of analytical chemistry; it informs the reader about new achievements in analytical methods, instruments and reagents. Ample space is devoted to problems arising in the analysis of vital media such as water and air. Consideration is given to the detection and determination of metal ions, anions, and various organic substances. The journal welcomes manuscripts from all countries in the English or Russian language.
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