Abstract
A point of notation In the absence of an internationally approved and formally correct symbol, in this issue the notion ‘parts per million’ is represented by ‘ x 10
-6
’ or ‘/10
6
’. This is in accordance with the recommendation contained in
Quanties, Units and Symbols
(The Royal Society, 1975). Where no numerical value is given, the expression ‘millionths’ is used.
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献