Formaldehyde in Alcoholic Beverages: Large Chemical Survey Using Purpald Screening Followed by Chromotropic Acid Spectrophotometry with Multivariate Curve Resolution

Figure 3

Automated steam distillation device for the determination of formaldehyde in alcoholic beverages: (1) Kjeldatherm digestion tube with acidified sample, (2) steam inlet tubing, (3) Viton-cone, (4) distillation condenser cooled at 1°C, (5) distribution head, (6) keyboard and display, (7) distillate outlet tubing, and (8) cooled graduated flask as receiver containing ice and sulfuric acid (25%), in which the outlet tubing must be submerged to avoid losses.