Determination of water content in Brazilian honeybee-collected pollen by Karl Fischer titration

被引：31

作者：

Morgano, Marcelo A. ^{[1
]}

Milani, Raquel F. ^{[1
]}

Martins, Marcia C. T. ^{[2
,3
]}

Rodriguez-Amaya, Delia B. ^{[3
]}

机构：

[1] Food Sci & Qual Ctr, Inst Food Technol, BR-13070178 Campinas, SP, Brazil

[2] Adventist Univ Sao Paulo, BR-05858001 Sao Paulo, Brazil

[3] Univ Estadual Campinas, Fac Food Engn, BR-13083862 Campinas, SP, Brazil

来源：

FOOD CONTROL | 2011年 / 22卷 / 10期

基金：

巴西圣保罗研究基金会;

关键词：

Bee pollen; Water content; Karl Fischer titration; QUALITY; FOOD;

D O I：

10.1016/j.foodcont.2011.03.016

中图分类号：

TS2 [食品工业];

学科分类号：

0832 ;

摘要：

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.

引用

页码：1604 / 1608

页数：5

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