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Quantification of Shrimp in Shrimp‐Surimi Mixtures using Urea Gel Isoelectric Focusing
Author(s) -
HUANG TUNGSHI,
CHEN JON S.,
MARSHALL MARTY R.,
WEI CHENGI
Publication year - 1990
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1990.tb03899.x
Subject(s) - shrimp , isoelectric focusing , isoelectric point , litopenaeus , chemistry , food science , chromatography , fishery , decapoda , urea , biology , crustacean , biochemistry , enzyme
A method of quantitate the percent content by weight of shrimp in surimi‐pink shrimp mixtures was developed by comparing peak areas of two Alaska pollock surimi‐specific (pI 7.11 and 7.17) and two shrimp‐specific (pI 5.46 and 5.52) protein bands on isoelectric focusing (IEF) gels. An equation describing the linear relationship between peak areas and protein from the standard samples of surimi, shrimp and surimi‐pink shrimp mixtures was also developed. Using this method, unknown mixtures containing 10.0, 12.4 and 5.7% pink shrimp, respectively, were determined in blind studies to contain 8.3, 12.0 and 4.4% shrimp and 85.7, 86.8, and 92.7% surimi, respectively.