关键词: 卡尔指数, 流动性, 喷流性, 营养素补充剂

Abstract: This research aimed to evaluate the flowability and floodability of several powdery nutrients used in wheat flour fortification. The angle of repose, angle of fall, angle of difference, angle of spatula, aerated bulk density, packed bulk density, compressibility, uniformity coefficient and dispersibility of powdery nutrients samples were determined using a bulk powders characterization tester (BT-1000) and their flowability and floodability indices were calculated with reference to the table of Carr’s flowability index and Carr’s floodability index to range from 38 to 90.5 and from 35.5 to 67.5, respectively, with apparent differences. A significant linear correlation between flowability index and angle of repose, compressibility or angle of spatula (P＜0.01) was found, although flowability index did not show a significant statistical relationship with uniformity coefficient; similarly, there was a significant correlation between floodability index and angle of fall, angle of difference and dispersibility (P＜0.01) despite no significant statistical relationship between flowability index and floodability index. All investigated nutrients revealed differences in flowability and floodability because of the differences in physical properties and no direct association between both parameters.

Key words: Carr’s index, flowability, floodability, nutritional fortifier