Accurately weigh ca 2 g well-mixed sample in covered dish previously dried at 98-100°, cooled in desiccator, and weighed soon after reaching room temperature. Loosen cover (do not remove) and heat at 98-100° to constant weight )ca 5h) in partial vacuum having pressure equivalent to ≤25 mm Hg (3.3 kPa). Admit dry air into oven to bring to atmospheric pressure. Immediately tighten cover on dish, transfer to desiccator, and weigh soon after reaching room temperature. Report flour residue as total solids and loss in weight as moisture (indirect method).