[Orgmode] export of list with lowered characters

[Jörg Hagmann]

Hi,

How can I get the following to be exported correctly to html?

- A 20mM HCO_{3}^{-}
- B 20 - 100mM H^{+}
- C 20 - 100mM Na^{+}
- D 5 - 15 mM K^{+}
- E 80 - 150mM Cl^{+}

I have "^{}:t" in the "+OPTIONS:" line.
In other words: can I turn off strike-throughs (+....+)?

Thanks, Jörg