The determination of the alcoholic strength in spirits and liqueurs is required to control the labelling of alcoholic beverages. The reference methodology prescribes a distillation step followed by densimetric measurement. The classic distillation using a Vigreux rectifying column and a West condenser is time consuming and error-prone, especially for liqueurs that may have problems with entrainment and charring. For this reason, this methodology suggests the use of an automated steam distillation device as alternative. The novel instrument comprises an increased steam power, a redesigned geometry of the condenser and a larger cooling coil with controllable flow, compared to previously available devices. Method optimization applying D-optimal and central composite designs showed significant influence of sample volume, distillation time and coolant flow, while other investigated parameters such as steam power, receiver volume, or the use of pipettes or flasks for sample measurement did not significantly influence the results. The method validation was conducted using the following settings: steam power 70 %, sample volume 25 mL transferred using pipettes, receiver volume 50 mL, coolant flow 7 L/min, and distillation time as long as possible just below the calibration mark.
Improved automatic steam distillation for determining alcoholic strength in spirits and liqueurs
Steam distillation with oscillation-type densimetry for alcohol strength determination
- alcohol determination
- steam distillation
- rapid steam distill…
- distillation systems
- distillation
- ethanol
-
White papers
Nitrogen / Protein Analysis for Starch
Starch products only contain very low concentrations of proteins. For analysis, the Dumas combustion method has established itself as second reference method more
Are Macro Sample Weights at Macro Costs Still Viable Today?
Cost efficiency and the conservation of resources are very often a contradiction. The protein/nitrogen analysis system DUMATHERM brings both demands together more
Improved automatic steam distillation for determining alcoholic strength in spirits and liqueurs
Excellent alternative for sample cleanup of volatiles from complex matrices. Major advantages are the low costs for consumables per analysis more
-
Products
All-Rounder for Solid/Liquid Extraction
Extraction methods are often time-consuming and handling solvents is potentially dangerous. C. Gerhardt developed SOXTHERM to solve this problem more
Kjeldahl: Fully Automated Distillation, Titration and Evaluation
Use VAPODEST 500 and 500 C to increase productivity, analytical accuracy and work safety in your lab more
Automatic Steam Distillation for Kjeldahl Analysis
With VAPODEST you distill your samples for the determination of nitrogen, cyanide, SO2, ammonia, phenol, sorbic acid or alcohol safely and quickly more
-
Videos
All-Rounder for Solid/Liquid Extraction
Extraction methods are used in many ways for classic fat determination in foodstuffs and animal feed. The physical separation method is also useful in environmental and residue analytics and for quality inspection of production materials. The substance to be determined is dissolved out of t ... more
Automatic Steam Distillation for Kjeldahl Analysis
Nitrogen determination according to Kjeldahl is recognized the world over as a reference method, so optimal sample preparation is a must. VAPODEST lets you distill safely and quickly not only samples for the determination of nitrogen according to Kjeldahl, but also of cyanide, SO2, ammonia, ... more
- 1Microwave freeze drying of fruits & vegetables
- 2Risks and Hazards Caused by ELECTROSTATICS in the LAB?!
- 3Comparing ICP-OES Analyzers' Plasma Views: Axial, Radial, Dual, MultiView, and New Dual Side-On Interface
- 4Theory and practice of conductivity measurement
- 5Benefits of Deep Learning and AI in Microscopy: Label-Free Nucleus Detection in Micro Well Plates
- 6Dissolved Oxygen measurement in theory and in practice
- 7Which ICP-OES Optical Technology Offers Superior Performance: Echelle or ORCA?
- 8Field-Flow Fractionation - The Universal Separation Principle for Particle and Macromolecule Characterization
- 9ETC Powder Dispensing Study
- 10Titration Handbook – Theory and Practice of Titration
