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Development of a first order derivative spectrophotometry method to rapidly quantify protein in the presence of chitosan and its application in protein encapsulation systems.

Abstract：

:A new protein quantification method based on first order derivative spectrophotometry was established to eliminate various interferences, mainly chitosan, to the utmost using bovine serum albumin (BSA) as a model food protein. Absorbance spectra of BSA solutions were recorded and their first order derivative calculated. The values of derivative absorbance at 288 nm were used to generate linear calibration curve of BSA. The new method was applied in entrapping BSA into chitosan-tripolyphosphate beads. A general calibration curve was established with a CI (width of 95% confidence interval of three repeat measurements of unknown samples) less than 0.0262 g/L and a LOQ (limit of quantification) of 0.11 g/L, showing excellent tolerance to various interferences, which was further verified by the good mass balance of BSA during encapsulation. Overall, the method successfully eliminated the interferences from chitosan and other factors to facilitate the measurement of protein in complicated environments.

journal_name

Food Chem

journal_title

Food chemistry

authors

Yuan D,O'Riordan ED,Jacquier JC

doi

10.1016/j.foodchem.2019.02.121

subject

Has Abstract

pub_date

2019-08-15 00:00:00

pages

1-6

eissn

0308-8146

issn

1873-7072

pii

S0308-8146(19)30463-7

journal_volume

289

pub_type

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