【摘要】 本文对国产白砂糖中微量的淀粉用稀碘液显色，观察其碘复合物的显色规律性，根据吸收光谱选定最佳测定条件。实验表明．糖中的可溶性淀粉与碘作用显青蓝色，其最大吸收波长λmax为580nm，脱水葡萄糖单元的聚合度约35。对不同澄清方法生产的白砂糖的测定结果表明：亚硫酸法糖厂的白砂糖淀粉含量较高在50×10(-6)～100×10(-6)之间，个别厂超过300×10(-6)；碳酸法糖厂的较低，为10×10(－6)～35×10(-6)之间;精幼砂糖则含量极微。更多还原

【Abstract】 Based on the colour formation law of starch-iodine complex, the diluted iodinewas used to determine the trace starch in granulated sugars. According to absorptionspectrum, the optimum determination conditions had been defined. In granulated sugars,the soluble starch was about DP35, its light blue iodine complex showed the maximumabsorption wave length λ max was 58Onm. Also results of sugars produced from differentclarifications implied: the amount of starch in sugars from sulphitation process washigher, between 50 X lO-6 l00 x l0-, some even over 30O X l0-6: while those incarbonation process factories were lower, between 10 X 10-6～35 X lO-6: and the starch infine sugars was extremely trace.更多还原