ppm和ppt定义为:
1ppm = 1/106 = 10-6
1ppt = 1/1012 = 10-12
所以
1ppm = 106ppt
每百万分之一的数量x ppm等于每万亿分的数量x ppt除以10 6:
xppm = xppt / 106
例如:7000ppt等于0.007000ppm:
xppt = 7000ppt / 106 = 0.007ppm
ppt | 百万分之几 |
---|---|
1个 | 0.000001 |
10 | 0.00001 |
100 | 0.0001 |
1000 | 0.001 |
10000 | 0.01 |
100000 | 0.1 |
10 6 | 1个 |
10 7 | 10 |
10 8 | 100 |
10 9 | 1000 |
10 10 | 10000 |
.