We have a UV gas analyzer we want to test to see if it reads gas phase $\ce{H2SO4}$. How can we safely produce less than $\pu{5 ppm}~\ce{H2SO4}$ as a spike test to see if the analyzer sees the spectra?
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1$\begingroup$ Perhaps heat anhydrous calcium sulfate mixed with silica. That generates sulfur trioxide plus calcium silicate. The sulfur trioxide plus water vapor gives the sulfuric acid. Maybe just use fresh Drierite (TM) and silica gel (the chromatographers always have it). $\endgroup$– Ed VCommented Apr 19, 2021 at 21:27
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$\begingroup$ This PDF from psu.edu contains graphical data about H2SO4 partial pressure at various temperatures $\endgroup$– PoutnikCommented Apr 20, 2021 at 1:52
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