Interference of the pH, BSA and of phosphate buffer concentration on the response in the total protein determination by the biuret method

Authors

  • João Baptista Severo Junior UFS
  • Euzébio Clei de Oliveira Correia UFS
  • Roberto Rodrigues de Souza UFS
  • José Carlos Curvelo Santana Unicamp
  • Elias Basile Tambourgi Unicamp

DOI:

https://doi.org/10.5585/exacta.v5i2.1183

Keywords:

Interferências. Método do biureto. Otimização. Proteínas. Tampão fosfato.

Abstract

In this work, the aim was to minimize the interference effect provoked by pH and the bovine serum albumin (BSA) and the phosphate buffer concentration on the total protein concentration determined by the biuret method, using a statistical model, established by response surface methodology (RSM). Results showed that the factors effects on protein concentration analysis were very significant and, in order to reduce these effects, it is necessary to use 0.01 M phosphate buffer at pH 7 and the protein concentration must be inferior, at 3 g/L.

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Author Biographies

João Baptista Severo Junior, UFS

Graduando do Departamento de Engenharia Química – UFS. São Cristóvão – SE

Euzébio Clei de Oliveira Correia, UFS

Graduando do Departamento de Engenharia Química – UFS. São Cristóvão – SE

Roberto Rodrigues de Souza, UFS

Professor do Departamento de Engenharia Química – UFS. São Cristóvão – SE

José Carlos Curvelo Santana, Unicamp

Pós Doutorando do Departamento de Engenharia de Sistemas Químicos, Faculdade de Engenharia Química – Unicamp. Campinas – SP

Elias Basile Tambourgi, Unicamp

Professor do Departamento de Engenharia de Sistemas Químicos, Faculdade de Engenharia Química – Unicamp. Campinas – SP

Published

2008-08-08

How to Cite

Junior, J. B. S., Correia, E. C. de O., de Souza, R. R., Santana, J. C. C., & Tambourgi, E. B. (2008). Interference of the pH, BSA and of phosphate buffer concentration on the response in the total protein determination by the biuret method. Exacta, 5(2), 335–342. https://doi.org/10.5585/exacta.v5i2.1183