New approach for direct analysis of opaque solutions with high content of suspended solids: Determination of calcium and phosphate in raw sugarcane juice

Autor(es)

Brasil, Marcos A. S. ^[1] ; Sasaki, Milton K. ^[2] ; Kamogawa, Marcos Y. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Ctr Nucl Energy Agr, Av Centenario 303, POB 96, BR-13400970 Piracicaba, SP - Brazil

^[2] Univ Fed Rio Grande do Sul, Inst Chem, Av Bento Goncalves 9500, BR-91501970 Porto Alegre, RS - Brazil

^[3] Univ Sao Paulo, Coll Agr Luiz de Queiroz, Av Padua Dias 11, POB 9, BR-13418900 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Talanta; v. 226, MAY 2021.
• Citações Web of Science: 0

Resumo

This paper presents a new analytical approach for element concentration determination in samples containing significant concentrations of dissolved and suspended interferences. The proposed system enables to segregate of the complex matrix, species of interest from other interferences with a minimum requirement of reagents and energy. For this purpose, a new cleanup chamber design was implemented with cationic and anionic resins employed under membrane form and the tangential flow of the solution avoided the drawbacks commonly attributed to the packed and fluidized bed columns, such as the formation of preferred paths, increasing hydrodynamic pressure and clogging. The element concentration determination was colorimetrically performed with an automatic flow analysis system. The strategy was validated with the concentration determination of calcium and phosphorus in raw sugarcane juice. Quantification limit of 0.48 to calcium and 1.13 mg L-1 to phosphorus, linear range between 1 and 50 mg L-1, with RSD of 0.50 and 1.50% (n = 11) respectively. (AU)

• Processo FAPESP: 17/05701-8 - Incrustações em evaporadores de usinas de açúcar: prognóstico de formação, prevenção e solubilização química
• Beneficiário: Marcos Augusto Stolf Brasil
• Modalidade de apoio: Bolsas no Brasil - Doutorado