淀粉细度测定方法的探讨

A Study on the Method for Detecting the Fineness of Starch

研究了淀粉细度的测定方法。探索了一种用标准检验筛筛分淀粉测定细度的方法，并将该方法和GB／T12096--1989进行了比较。探讨了不同来源的淀粉、变性淀粉以及不同水分的淀粉运用该方法的可靠性。结果表明，用标准检验筛测定淀粉细度的条件为：金属丝编织筛网，孔径150μm，频率1420r／min，振幅2～5mm，时间10min。

The method for detecting the fineness of starch was studied. The fineness of starch was detected by a standard testing screen and then the result from the current method was compared with the fineness degree which is calculated by referring to the GB/T 12096--1989. The result shoed that the conditions for detecting the fineness of starch by a standard testing screen were： metal woven screen with an aperture diameter of 150 μm, frequency 1 420 r/min, amplitude 2 - 5 mm and time 10 min.