Measurement of Oxalic Acid Content in Beer

Oxalic acid content in beer was measured by titanium trichloride photometric method and the relative indexes were as follows: pH value as 1.5-1.7, wavelength of detection light as 400 nm, detection range as 0.3×10-3 -4×10-3 mol/L, and detection low limit as 0.3×10-3mol/L. The results suggested that the average detection recovery was 99.6 % and the detection had certain reproductivity.