Patentiometric Titration was applied todetermined the DDA of dryness product, as the result showed, DDA of product prepared by ChA was 84.85% and product separated from fermentation liquid was 76.82%.

• 采用线性滴定法测定了喷雾干燥产品的脱乙酰度；结果表明；由内切酶直接降解制备的低聚糖产品脱乙酰度为84.；85%25；而从内切酶和外切酶同时降解的发酵液中分离得到的产品脱乙酰度为76