Development and optimization of a method for determining betaine and trigonelline in the fruits of Lycium species by using solid-phase extraction combined with HPLC-diode array detector

Journal of Separation Science
Wenjing LiuYanhong Shi

Abstract

Betaine is an essential nutrient for humans and a source of methyl donors for methionine and S-adenosylmethionine formation, and it is used as a biomarker for pharmacological activities and to evaluate the quality of Lycium species and common foods. However, because of its special structural features, poor ultraviolet-chromophore, and high polarity, the existing methods for betaine extraction and quantification cannot provide higher extraction efficiency, better sensitivity or resolution degree. A simple, fast, and efficient high-performance liquid chromatography-diode array detector coupled with solid-phase extraction was adopted for simultaneous separation and quantification of betaine in four types of Lycium species. The results revealed that after degreasing with dichloromethane, extraction with 80% ethanol (pH adjusted to 1.0 with hydrochloric acid), and elution with aluminum oxide (OH- form) the improvement in the average yield rate of betaine was thrice of that of the existing methods. In addition, trigonelline was identified as the interfering substance of betaine for the first time in Lycium species, and betaine and trigonelline were simultaneously separated and quantified. Furthermore, their chemical characteristics a...Continue Reading

References

Mar 23, 2002·Phytochemistry·Karl V WoodDavid Rhodes
Dec 27, 2005·Journal of Chromatography. a·Malina K StorerMichael Lever
Dec 10, 2015·Pancreas·Wenjuan YangChengwei Tang
Jul 28, 2016·The American Journal of Emergency Medicine·Mohadeseh SaniSalman Khazaei
Sep 13, 2018·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·Love SharmaTasduq Abdullah

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