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By Santa Monica College.

Publisher: Chemistry LibreTexts.

This source is credited to an organization.

Online text: chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/General_Chemistry_Labs/Online_Chemistry_Lab_Manual/Chem_11_Experiments/11B:_The_Dumas_Method_(Experiment)

The page credits Santa Monica College and carries a last-modified timestamp of 27 February 2026. The date is an update rather than a first-publication year.

Cited passages: Lab Report, questions 1–4: residual air, glass expansion, nonideal vapor and incomplete thermal equilibration; Santa Monica College, 11B, Experimental Set-up steps 1–6; Trials 1–3 steps 1–4: apparatus, dye endpoint, heating, drying and repetition.