ppm和ppt定义为:
1ppm = 1/106 = 10-6
1ppt = 1/1012 = 10-12
所以
1ppm = 10 6个百分点,每万亿分之一的数量x ppt等于每百万分之一的数量x ppm乘以10 6:
xppt = xppm ⋅ 106
示例:7ppm等于7000ppb:
xppt = 7ppm ⋅ 106 = 7000000ppt
百万分之几 | ppt |
---|---|
0.000001 | 1个 |
0.00001 | 10 |
0.0001 | 100 |
0.001 | 1000 |
0.01 | 10000 |
0.1 | 100000 |
1个 | 10 6 |
10 | 10 7 |
100 | 10 8 |
1000 | 10 9 |
10000 | 10 10 |
.