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十亿分比.
十亿分比(parts per billion,ppb),定义为十亿分之一。1ppb 即是十亿分之一。
- 一【千克】(kg)的物质中有一【微克】(ug)某物质,某物质含量即为1ppb。
- 三十二【年】(Years)里的一【秒】(Second)为1ppb。
- 十【吨】(Tons)的薯片里有少许(Pinch)的盐为1ppb。
可以用在衡量生产品质上,例如:对客户的出货ppb保证在30ppb以下;公司内制程ppb控制在150ppb等。
|
百分比 |
千分比 |
万分比 |
百万分比 |
十亿分比 |
万亿分比
|
百分比
|
1 |
10 |
100 |
104 |
107 |
1010
|
千分比
|
0.1 |
1 |
10 |
103 |
106 |
109
|
万分比
|
0.01 |
0.1 |
1 |
102 |
105 |
108
|
百万分比
|
10-4 |
10-3 |
10-2 |
1 |
103 |
106
|
十亿分比
|
10-7 |
10-6 |
10-5 |
10-3 |
1 |
103
|
万亿分比
|
10-10 |
10-9 |
10-8 |
10-6 |
10-3 |
1
|
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