# CB06 or SAPRC07

**URL:** <https://forum.cmascenter.org/t/cb06-or-saprc07/1504>\
**Category:** SMOKE\
**Created:** [May 20, 2020, 1:34pm UTC](https://forum.cmascenter.org/t/cb06-or-saprc07/1504 "2020-05-20T13:34:50Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![qinch18](https://avatars.discourse-cdn.com/v4/letter/q/71e660/32.png) [@qinch18](https://forum.cmascenter.org/u/qinch18)\
**Post date:** [May 20, 2020, 1:34pm UTC](https://forum.cmascenter.org/t/cb06-or-saprc07/1504/1 "2020-05-20T13:34:50Z")

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Hello, when I want to use SMOKE to run chemical mechanisms other than CB05, such as CB06 and SAPRC07.What should I do?

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**Author:** ![bbaek](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.cmascenter.org/bbaek/32/22_2.png) [@bbaek](https://forum.cmascenter.org/u/bbaek)\
**Post date:** [June 1, 2020, 2:07pm UTC](https://forum.cmascenter.org/t/cb06-or-saprc07/1504/2 "2020-06-01T14:07:46Z")

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@qinch18. Please use the SMOKE user’s guide to learn how to update your speciation allocation step with a different chemical mechanism.  
[https://www.cmascenter.org/smoke/documentation/4.7/html/ch06s15.html](https://www.cmascenter.org/smoke/documentation/4.7/html/ch06s15.html)  
[https://www.cmascenter.org/smoke/documentation/4.7/html/ch04s04s10.html](https://www.cmascenter.org/smoke/documentation/4.7/html/ch04s04s10.html)  
[https://www.cmascenter.org/smoke/documentation/4.7/html/ch02s11.html](https://www.cmascenter.org/smoke/documentation/4.7/html/ch02s11.html)