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 ppm = 1,000 µg/L
1 µg/L = 0.001 ppm
例子:
将15 零件百万转换为微克每升：
15 ppm = 15,000 µg/L
| 零件百万 | 微克每升 |
|---|---|
| 0.01 ppm | 10 µg/L |
| 0.1 ppm | 100 µg/L |
| 1 ppm | 1,000 µg/L |
| 2 ppm | 2,000 µg/L |
| 3 ppm | 3,000 µg/L |
| 5 ppm | 5,000 µg/L |
| 10 ppm | 10,000 µg/L |
| 20 ppm | 20,000 µg/L |
| 30 ppm | 30,000 µg/L |
| 40 ppm | 40,000 µg/L |
| 50 ppm | 50,000 µg/L |
| 60 ppm | 60,000 µg/L |
| 70 ppm | 70,000 µg/L |
| 80 ppm | 80,000 µg/L |
| 90 ppm | 90,000 µg/L |
| 100 ppm | 100,000 µg/L |
| 250 ppm | 250,000 µg/L |
| 500 ppm | 500,000 µg/L |
| 750 ppm | 750,000 µg/L |
| 1000 ppm | 1,000,000 µg/L |
| 10000 ppm | 10,000,000 µg/L |
| 100000 ppm | 100,000,000 µg/L |
规则