Using water distilled the Dark Brown Pigment from Walnut epicarp in the sample of differend sampling point and same means dry.We have tested the stability of the dark brown pigment.

• 摘要对不同地方采集的核桃外果皮用同样的方法进行乾燥后，以水为萃取剂，提取棕褐色色素并对其稳定性进行了侧试和比较。