使用洗脱液将样品中可溶性糖与淀粉分开，淀粉经酸水解为葡萄糖，进一步与蒽酮反应生成蓝绿色糠醛衍生物，产物在620 nm处具有特征吸收峰，通过吸光值变化即可定量检测淀粉的含量。
标准物质： Glucose①若A测定或∆A测定超出标准线性吸光值范围：高于最高值建议将待测样本使用蒸馏水适当稀释后再进行测定；低于最低值建议制备更高浓度样本后再进行测定，计算时相应修改；
②浓硫酸具有强腐蚀性，请做好防护措施并谨慎操作；
③待测样本稀释倍数可参照公式计算
最大稀释倍数（DMax）=74"×W×A"
最小稀释倍数（DMin）=6"×W×A"
注释：W：样品质量，g；A：预估淀粉含量，mg/g；例：预估淀粉含量为400 mg/g（40%），称取0.05 g样本进行淀粉提取，DMin=120，DMax=1480，即待测样本稀释倍数可选择120-1400倍。
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