各种濃度的卜萄糖注射液在加热灭菌后, pH都显著下降,50%的約降低到3.8左右,59%的約降低到4.1左右。过去对于这pH的降低的原因解釋是:卜萄糖經高温有部分分解所致。現在我們發現造成卜萄糖分解的根本原因是因为氧气的存在。下面的試驗可以証明:在新鮮煮沸放冷的蒸溜水中不断通入高純氮气一小时,用这样的蒸馏水配制卜萄糖注射液,进行氮气灌充,經 After heat sterilization at various concentrations of glucose injection, the pH was significantly decreased, about 50% reduced to about 3.8, 59% decreased to about 4.1. The reason for this decrease in pH in the past is explained by the partial breakdown of the glucose at high temperatures. Now we find that the root cause of glucose decomposition is due to the presence of oxygen. The following test can prove: in freshly boiled cold distilled water continuously into the high-purity nitrogen for one hour, with such distilled water preparation of glucose injection, nitrogen filling, the