I'm having the following trouble using mhchem in my glossaries. I'd like to not have to worry about whether I've used an acronym already when I start out a sentence, but I'm finding that \Gls does not seem to work very well with mhchem in glossaries. I can work around by trying to keep track of whether or not I've used the acronym yet, but I'd love to be able to make an edit in my \newacronym definitions to make it work. Any suggestions would be appreciated!
\documentclass{article}
\usepackage[acronym]{glossaries} % Load the package
\makeglossaries % Prepare the glossary
\usepackage[version=3]{mhchem}
\newacronym{CO2}{\ce{CO2}}{carbon dioxide}
\newacronym{CH4}{CH$_4$}{methane}
\newacronym{H2SO4}{\NoCaseChange{\ce{H2SO4}}}{sulfuric acid}
\begin{document}
%I'd like the following to work, but it doesn't...
\Gls{CO2} in the environment \ldots
\Gls{CO2} now generates an error
\Gls{CH4} in the environment \ldots
\Gls{CH4} works fine.
%\gls works fine
Calculation of the corresponding \gls{CO2} emissions to cover the surplus in electricity demand.
%I also tried
\Gls{H2SO4} is an acid. We use \gls{H2SO4} everyday.
\Gls{H2SO4} generates an error \ldots
\gls{H2SO4} is okay.
\printglossary[type=acronym,title={List of Abbreviations}]
%\printglossaries
\end{document}
\newacronym{CO2}{{}\ce{CO2}}{carbon dioxide}should work – clemens Jul 31 '15 at 18:04\Glsis trying to do\MakeTextUppercase\ce{CO2}(so\MakeTextUppercaseis trying to grab just\ceas the argument, which causes an error). In the third case,\Glsis trying to do\MakeTextUppercase\NoCaseChange{\ce{H2SO4}}(so\MakeTextUppercaseis trying to grab\NoCaseChangeas the argument, which causes an error). Internally\Glsis using\makefirstuc, which is described in more detail in the mfirstuc manual. – Nicola Talbot Jul 31 '15 at 19:06\newacronym{CO2}{\empty\ce{CO2}}{carbon dioxide}go wrong (similarly with\relax)? Since\MakeTextUppercase\emptycompiles just fine I suspect the cause to be somewhere else… – clemens Sep 7 '15 at 19:09\makefirstucsince\makefirstuc{\empty\ce{CO2}}fails. It's probably something to do with the mechanism that's trying to determine if\emptyhas an argument.\makefirstuc{\empty{}\ce{CO2}}works fine, and there's also no problem if I replace\cewith another command, such as\makefirstuc{\empty\textbf{CO2}}. I'll look into it, but I think the simplest thing to do in this case is just\newacronym{CO2}{{}\cs{CO2}}{carbon dioxide}. – Nicola Talbot Sep 8 '15 at 8:20