Method for the accurate determination of phytic acid in beverages by liquid chromatography-mass spectrometry after methylation with (trimethylsilyl) diazomethane

Yu, Saisai; Cai, Chenggang; Zhang, Xiaoxiao; Chen, Sheng; Jiang, Kezhi

doi:10.1016/j.lwt.2021.112212

Cited by 2 publications

(1 citation statement)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As can be seen, the MS signal of CCAs obtained by chelating resin‐assisted extraction shows much higher intensity than that of CCAs obtained by direct extraction (or ion‐exchange resin‐assisted extraction). Similarly, the removal of high‐valent cations by treatment with ion‐exchange resin has been reported to greatly improve the derivatization efficiency 50,51 . Thus, chelating resin‐assisted extraction was used in the subsequent work.…”

Section: Resultsmentioning

confidence: 99%

Determination of trace chelating carboxylic acids in rice by green extraction combined with liquid chromatography–mass spectrometry analysis and its application in the evaluation of old and new rice

Kang,

Wang,

Feng

et al. 2024

Rapid Comm Mass Spectrometry

Self Cite

View full text Add to dashboard Cite

RationaleAccurate identification of old rice samples from new ones benefits their market circulation and consumers. However, the current detection methods are still not satisfactory because of their insufficient accuracy or (and) time‐consuming process.MethodsChelating carboxylic acids (CCAs) were selectively extracted from rice, by stirring with chelating resin and a dilute Na2CO3 solution. The green analytical chemistry guidelines for sample preparation were investigated by using the green chemistry calculator AGREE prep. The extractant was determined by liquid chromatography–mass spectrometry (LC/MS), and statistical analysis of the analytical data was carried out to evaluate the significance of the difference by ChiPlot.ResultsThe limit of quantitation for the CCAs is in the range of 1 to 50 ng/mL, with a reasonable reproducibility. The CCAs in 23 rice samples were determined within a wide concentration range from 0.03 to 1174 μg/g. Intriguingly, the content of citric acid, malonic acid, α‐ketoglutaric acid and cis‐aconite acid in new rice was each found to be distinctively higher than that in old rice by several times. Even mixtures of old and new rice were found to show much difference in the concentration of citric acid and malic acid.ConclusionA green analytical method has been developed for the simultaneous determination of CCAs by LC/MS analysis, and the identification of old rice samples from new ones was easily carried out according to their CCA content for the first time. The results indicated that the described method has powerful potential for the accurate identification of old rice samples from new ones.

show abstract

Section: Resultsmentioning

confidence: 99%