ppm和ppb定义为:
1ppm = 1/10 6 = 10 -6
1ppb = 1/10 9 = 10 -9
所以
1ppm = 1000ppb
百万分之几x ppm等于十亿分之几x ppb除以1000:
x ppm = x ppb / 1000
示例:7000ppb等于7ppm:
x ppm = 7000ppb / 1000 = 7ppm
ppm到ppb的转换►
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