# How to check exact partial charges on a surfactant by gromacs

**URL:** <https://gromacs.bioexcel.eu/t/how-to-check-exact-partial-charges-on-a-surfactant-by-gromacs/6054>\
**Category:** User discussions\
**Tags:** analysis-tools\
**Created:** [March 27, 2023, 3:03pm UTC](https://gromacs.bioexcel.eu/t/how-to-check-exact-partial-charges-on-a-surfactant-by-gromacs/6054 "2023-03-27T15:03:39Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Ramya123](https://avatars.discourse-cdn.com/v4/letter/r/7c8e57/32.png) [@Ramya123](https://gromacs.bioexcel.eu/u/Ramya123)\
**Post date:** [March 27, 2023, 3:03pm UTC](https://gromacs.bioexcel.eu/t/how-to-check-exact-partial-charges-on-a-surfactant-by-gromacs/6054/1 "2023-03-27T15:03:39Z")

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GROMACS version: 2022  
GROMACS modification: No  
I am performing bilayer simulation using gromacs, where I’m not getting how to check exact partial charges on a surfactant.

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**Author:** ![jalemkul](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/jalemkul/32/18_2.png) [@jalemkul](https://gromacs.bioexcel.eu/u/jalemkul)\
**Post date:** [March 27, 2023, 3:54pm UTC](https://gromacs.bioexcel.eu/t/how-to-check-exact-partial-charges-on-a-surfactant-by-gromacs/6054/2 "2023-03-27T15:54:56Z")

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Partial charges are listed in the topology file.