摘要
金樱子提取液在模拟胃液ｐＨ条件下对ＮＯ２－具有很强的清除作用。用０．１％柠檬酸作提取剂，在固液比为１：３、温度为６０℃、提取时间为１ｈ所得的金樱子提取液对ＮＯ２－有８７％以上的清除率；浸出液中的Ｖｃ、还原糖、黄酮等对ＮＯ２－的清除有重要作用；浸出液在低ｐＨ值（ｐＨ２～３）下对ＮＯ２－清除作用强烈，随ｐＨ值升高，清除能力急剧下降。
The extractive of Rosa lavevigata Michx removed off great part of NO2- in the duplicating pH condition as gastric juice. It eliminated more than 87 perent of nitrous acid in the optimum extraction condition: 0.1 % citric acid as extraction solvent,the ratio of solid and liqujid 1 to 3, 60℃ temp. and 1 hour extraction time. The elements of Rosa laevigata Michx extractive such as vitamin C, reducing sugar and flavonoid do works in the removing off NO2-. When in low pH (pH2-3), it has great capability of eliminating NO2-, but with increasing of the pH value, the ability of clearing up reduces sharply.
