Artículos de revistas
Determination of water content in Brazilian honeybee-collected pollen by Karl Fischer titration
Registro en:
Food Control. Elsevier Sci Ltd, v. 22, n. 10, n. 1604, n. 1608, 2011.
0956-7135
WOS:000291910000007
10.1016/j.foodcont.2011.03.016
Autor
Morgano, MA
Milani, RF
Martins, MCT
Rodriguez-Amaya, DB
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) This paper assesses the performance of a chemical method based on the Karl Fischer titration to determine the water content in samples of dehydrated honeybee-collected pollen. The following analysis parameters were investigated: extraction temperature, particle size, reaction time, and weight of a dried pollen sample. After optimization, the method was used to determine the water content of 154 samples of dried honeybee-collected pollen from different geographical regions of Brazil. The Karl Fischer titration method, performed using a solvent mixture of methanol and n-octanol (1:1 v/v) at 50 degrees C on pollen particles 600 mu m in size produced the best results. Mean values for water content of the 154 samples of dried honeybee-collected pollen from 12 Brazilian regions ranged from 3% to 9%. (C) 2011 Elsevier Ltd. All rights reserved. 22 10 1604 1608 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)