PDF《坩埚：70μ氧化铝坩埚,无盖》

糖和淀粉的TGA TGA of Sugar and Starch 试样 糖(蔗糖)、玉米淀粉 Sample Sugar (saccharose), corn starch 应用 生产乳膏的原料 Application Basic materials for the manufacture of creams 条件 测试仪器: TGA Conditions Measuring cell: TGA 坩埚:70μ氧化铝坩埚,无盖 Pan: Alumina

70 μl, no lid 试样制备:分别将5.

26mg糖和4.99mg淀粉称入坩埚.如果以10K/min将糖 加热,则会在分解时起泡,溢出坩埚.加入约20mg干燥氧化铝粉末有助于 使试样保持在坩埚中. Sample preparation: Weigh 5.26 mg sugar and 4.99 mg starch into pans respectively. If sugar is heated at a rate of

10 K/min it foams up during decomposition and may leave the pan. The addition of approximately

20 mg dry alumina powder helps to keep the sample in the pan. 测试: 以10K/min由30°C升温至600°C Measurement: Heating from

30 °C to

600 °C at

10 K/min 气氛:氮气,50 ml/min Atmosphere: Nitrogen,

50 ml/min 图4.10 糖的 TGA、DTG 和同步 DTA 曲线 Figure 4.10 TGA, DTG and simultaneous DTA (SDTA) curves of sugar 解释 Interpretation 如图4.10糖的TGA测量曲线所示,高至200°C的TGA曲线平坦部分证明糖中没有水分 (