Kyriakidis N B, Psoma E
Agricultural University of Athens, Department of Food Science and Technology, Votanikos, Greece.
J AOAC Int. 2001 Nov-Dec;84(6):1947-9.
In the colorimetric determination of pectin by the carbazole method, some of the interfering compounds have been identified but the possible interference of different hydrocolloids is not known. Several hydrocolloids are currently used in the preparation of imitation and adulterated orange juice for cloud stabilization. Hydrocolloids studied were gum arabic, carboxylmethyl cellulose, sodium alginate, carrageenan, guar gum, and xanthan. The effects of these hydrocolloids on the carbazole method for pectin determination was studied. Procedures are proposed for the correct use of the carbazole method for pectin determination in the presence of extraneous hydrocolloids.
在用咔唑法比色测定果胶时，已鉴定出一些干扰化合物，但不同水胶体可能产生的干扰尚不清楚。目前有几种水胶体用于制备仿冒和掺假橙汁以稳定其浊度。所研究的水胶体有阿拉伯胶、羧甲基纤维素、海藻酸钠、卡拉胶、瓜尔豆胶和黄原胶。研究了这些水胶体对咔唑法测定果胶的影响。针对在存在外来水胶体的情况下正确使用咔唑法测定果胶，提出了相应步骤。
