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十億分比.
十億分比(parts per billion,ppb),定義為十億分之一。1ppb 即是十億分之一。
例子
- 一【公斤】(kg)的物質中有一【微克】(ug)某物質,某物質含量即為1ppb。
- 三十二【年】(Years)裡的一【秒】(Second)為1ppb。
- 十【噸】(Tons)的薯片裡有少許(Pinch)的鹽為1ppb。
應用
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。
轉換
|
百分比 |
千分比 |
萬分比 |
百萬分比 |
十億分比 |
万亿分比
|
百分比
|
1 |
10 |
100 |
104 |
107 |
1010
|
千分比
|
0.1 |
1 |
10 |
103 |
106 |
109
|
萬分比
|
0.01 |
0.1 |
1 |
102 |
105 |
108
|
百萬分比
|
10-4 |
10-3 |
10-2 |
1 |
103 |
106
|
十億分比
|
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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