浓度（摩尔）是每升溶液的摩尔数量的度量，通常以每升摩尔（mol/l）测量。
1 ppb = 1 µg/L
1 µg/L = 1 ppb
例子:
将15 零件十亿转换为微克每升：
15 ppb = 15 µg/L
| 零件十亿 | 微克每升 |
|---|---|
| 0.01 ppb | 0.01 µg/L |
| 0.1 ppb | 0.1 µg/L |
| 1 ppb | 1 µg/L |
| 2 ppb | 2 µg/L |
| 3 ppb | 3 µg/L |
| 5 ppb | 5 µg/L |
| 10 ppb | 10 µg/L |
| 20 ppb | 20 µg/L |
| 30 ppb | 30 µg/L |
| 40 ppb | 40 µg/L |
| 50 ppb | 50 µg/L |
| 60 ppb | 60 µg/L |
| 70 ppb | 70 µg/L |
| 80 ppb | 80 µg/L |
| 90 ppb | 90 µg/L |
| 100 ppb | 100 µg/L |
| 250 ppb | 250 µg/L |
| 500 ppb | 500 µg/L |
| 750 ppb | 750 µg/L |
| 1000 ppb | 1,000 µg/L |
| 10000 ppb | 10,000 µg/L |
| 100000 ppb | 100,000 µg/L |
规则