纯度对比是指一种颜色的鲜艳度取决于这一色相发射光的单一程度。不同的颜色放在一起，它们的对比是不一样的。人眼能辨别的有单色光特征的色，都具有一定的鲜艳度。 不同的色相不仅明度不同，纯度也不相同。有了纯度的变化，才使世界上有如此丰富的色彩。同一色相即使纯度发生了细微的变化，也会带来色彩性格的变化。
简要论述了铜酞菁纯度的测定；介绍了容量法和重量法的操作过程，并对其进行了对比和探讨。
The determination of purity of copper -phthalocyanine is discussed brie fly. The volumetric and weight operation procedures are introduced. Two methods are compared and discussed.
建议在体育场馆的建设中应充分考虑色彩的色相、明度、纯度、色彩的对比与场馆不同设施的关系。
In the stadium hall construction, it should fully consider the relationship of the color appearance, the brilliance, the purity, and the color contrast with stadium hall.
以吉林省玉米主推杂交种2 1个组合为试材，利用RAPD法与盐溶蛋白法（PAGE）进行了鉴定品种与杂交种纯度的对比试验。
RAPD and salt-soluble protein PAGE analysis were used in seed purity assessment of 21 hybrid corn combinations in Jilin Province.
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