This page needs to be proofread.
ALDEHYDES, SCREENING: METHOD 2539, Issue 2, dated 15 August 1994 - Page 7 of 10 V a = volume of sulfuric acid (mL) used for titration N b = normality of NaOH V b = volume of NaOH (mL) used for back titration V s = volume of form aldehyde stock solution (10.0 mL).
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition
