Journal of the Brazilian Chemical Society
On-line version ISSN 1678-4790
RICHTER, Eduardo M. et al. Determination of anions, cations, and sugars in coconut water by capillary electrophoresis. J. Braz. Chem. Soc. [online]. 2005, vol.16, n.6a, pp. 1134-1139. ISSN 1678-4790. http://dx.doi.org/10.1590/S0103-50532005000700008.
This work presents the determination of several analytes in coconut water by using capillary electrophoresis with contactless conductivity detection (CCD). It was analyzed 5 different samples: two unprocessed (natural) coconut water and three processed (commercial) ones. The samples were injected without pretreatment and only a simple dilution was necessary. The technique was applied to quantify 12 analytes: chloride, sulfate, phosphate, malate, ascorbate, potassium, sodium, calcium, magnesium, fructose, glucose, and sucrose with limit of detection (LOD) of 0.09, 0.12, 0.50, 0.97, 1.2, 0.05, 0.17, 0.12, 0.08, 5.4, 7.4, and 8.9 mg L-1, respectively. These analysis were done utilizing four different running buffers.
Keywords : coconut water; capillary electrophoresis; contactless conductivity detection.