Journal
MICROCHEMICAL JOURNAL
Volume 181, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.microc.2022.107787
Keywords
Resistant starch; Quantitative analysis; Asymmetrical flow field-flow fractionation
Categories
Funding
- Nature Science Foundation of Hebei Province [H2020201295]
- Key Research and Development of Hebei Province [22372505D]
- Foundation of Hebei University [DXK202115]
- Undergraduate's Innovation Fund Project of Hebei Province [22E50032D, 2022318]
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In this study, a combined technique of AF4 and LC was developed for the accurate structure characterization and quantitative analysis of RS. The results demonstrated that AF4-LC is a simple and rapid method for structurally informative detection and quantitative analysis of RS over the entire Mw distribution.
Resistant starch (RS) is one kind of biomacromolecules with prebiotic effects. Nowadays, it is still a challenge to characterize structure and content of RS over entire molecular weight (M-w) distribution. In this study, a combined technique of asymmetrical flow field-flow fractionation (AF4) and liquid chromatography (LC) for the accurate structure characterization and quantitative analysis of RS was developed. AF4 coupled online with multiangle light scatting (MALS) and differential refractive index (dRI) detectors (AF4-MALS-dRI) was used to characterize the structural information (radius of gyration and M-w) and content of RS with M-w larger than 5 kDa. Meanwhile, RS was characterized by scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. The glucose content in the digested starch solution was quantitatively determined using LC. The results demonstrated that AF4-LC is a simple and rapid method for structurally informative detection and quantitative analysis of RS over entire M-w distribution.
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