Potato starch was separated and characterized by field-flow fractionation. The interactions between the sample and the surface of ultrafiltration membrane in AF4 were investigated. The effects of ionic strength of carrier liquid, injection mass, cross-flow rate, and focusing time on the sample recovery were evaluated. The repeatability of the results was examined. The highest recovery of potato starch(97.30±0.02)% was obtained with a carrier liquid containing 5 mmol/L NaNO3 and 3 mmol/L NaN3, pH 7.00; injection mass, 15 μg; cross-flow rate, 1.0 mL/min; focusing time, 2.5 min. The method developed in this study showed good repeatability in terms of radius of gyration and molar mass with their relative standard deviations of 1.18% and 5.67%, respectively.
ZHANG Wenhui
,
SONG Tiange
,
SUN Yushan
,
SHEN Shigang
,
DOU Haiyang
. Recovery of potato strach during separation and characterization process using field-flow fractionation[J]. Journal of Hebei University(Natural Science Edition), 2022
, 42(4)
: 376
-383
.
DOI: 10.3969/j.issn.1000-1565.2022.04.007
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