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什么是气体的PPM浓度？

2025-04-08 07:30:13

推荐回答（1个）

回答1：

用溶质质量占全部溶液质量的百万分比来表示的浓度,也称百万分比浓度。ppm就是百万分率或百万分之几，气体ppm即该气体在混合气体中的质量分数，百万分之几。
http://baike.baidu.com/view/3195059.htm

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