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By using the class achemso Supporting information to prepare the there to carry out a cross-reference (\ref{table:S1}} for this aquivo external "supporting.tex", example: Text ... see (Fig. S2) or (Table: 2), this is Suporting in a separate file.

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Hi Fabio, welcome to TeX.sx! :) We could not understand your question, could you rephrase it a bit? Se preferir, adicione uma versão em Português à sua questão original e eu tento traduzi-la para você. :) – Paulo Cereda May 6 '12 at 15:45
Prezado Paulo Obrigado pela ajuda, desculpe pelo inglês A questão é que do suporting Information, existe como referenciar um Figura do Supporting com o comando \ref{Fig:S1}, mais consultando a revista vi que não é possível fazer isso. Talvez eu possa usar o \usepackage{xr} Nesta pacote achemso não tem o modelo final (publicado) em relação a class da Elsevier Acho que podem fechar o tópico – Fabio Lima May 7 '12 at 12:46
Fabio, é sempre um prazer ajudar os amigos! :) Quanto à sua questão, Joseph Wright vai comentar sobre ela amanhã. Abraço! :) – Paulo Cereda May 7 '12 at 21:52

The American Chemical Society (for whom achemso is written) provide only basic support for LaTeX submissions, and certainly do not use the LaTeX sources for final typesetting. I would therefore strongly recommend doing any cross-referencing between the main paper and Supporting Information 'by hand'. (It might be possible to use the xr package to produce cross-references, but this might go horribly wrong on submission so I would not do it!)

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