【摘要】 本文用自身指示剂即裴林试剂（酒石酸钾钠铜铬合物）的深蓝色溶液的颜色消失至呈K2FeCu（CN）6的浅黄色溶液为终点，代替国标法中直接滴定法的亚甲蓝指示剂，对标准葡萄糖及食品样品均进行了测定，结果均好.并与国标直接滴定法无显著性差异，该法减少了终点误差，简化了操作，节约了试剂。更多还原

【Abstract】 In the article we use Fehling’s reagent(KNaCuC4H2O6 complexes) in place of methylene blue indicator of the direct titrimetric method in National Stardard-5009.7-85 method for determination. The Fehling’s reagent itself can be regarded as a indicaror, When the color of dark blue in its solution vanishes and the color changes’s into light yellow of K2FeCu2 (CN)6 complexes solution in the tierimeeric process, then the end point of trtrimeeric is indicated.更多还原