Study on maize starch pasting by asymmetrical flow field-flow fractionation

doi:10.3969/j.issn.1000-1565.2019.04.008

Abstract

Abstract: The effect of sodium hydroxide(NaOH)dissolution method and dimethyl sulfoxide(DMSO)dissolution method on the conformation of maize starch was investigated.The dissolved maize starch was separated and characterized by asymmetrical flow field-flow fractionation(AF4)coupled with multiangle light scattering(MALS)and differential refractive index(dRI)detectors.Meanwhile, the morphology and conformation of the maize starch gel was characterized by scanning electron microscopy(SEM), X-ray diffraction(XRD), attenuated total reflection Flourier transform infrared spectroscopy(ATR-FTIR)and differential scanning calorimetry(DSC).The results revealed that the amylose-lipid complex can be disassociated by NaOH dissolution method, which makes the data(i.e.size and molar mass distributions)from AF4-MALS-dRI more accurate.

Key words: maize starch, dissolution, gel, asymmetrical flow field-flow fractionation

CLC Number:

O657

ZHANG Juhua, CHEN Xue, WANG Jing, HOU Ruilan, SHEN Shigang, DOU Haiyang. Study on maize starch pasting by asymmetrical flow field-flow fractionation[J]. Journal of Hebei University (Natural Science Edition), 2019, 39(4): 379-385.

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