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
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
Kjeldahl block digestion in high throughput can be so simple and convenient
KJELDATHERM digestion units are automated block digestion systems which deliver reproducible digestion conditions more
Nitrogen determination with the Dumas method
Available with a unique manual sample loader or an autosampler for up to 120 samples DUMATHERM performs according to international standards and regulations more
-
Videos
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
Nitrogen determination with the Dumas method
If you have to determine the protein content of many samples every day, you will be delighted with the DUMATHERM nitrogen analyser. In comparison to the Kjeldahl method, the device works without aggressive chemicals and therefore does not require valuable space in the fume hood. Determine t ... more
Automatic Fibre Extraction for Feed Analysis
The usability of animal feed and its impact on animal health depend in large part on the proportions of the different fibre fractions that it contains. The FibreBag method developed by C. Gerhardt makes dissolving and filtering the components significantly easier and ensures more reliable, ... more
- 1Microwave freeze drying of fruits & vegetables
- 2Advanced elemental analysis of soil
- 3Risks and Hazards Caused by ELECTROSTATICS in the LAB?!
- 4The pH Handbook – A Practical Guide for pH Measurement
- 5The Benefits of Automated and Evacuated X-ray Optics for Powder X-ray Diffraction
- 6Titration Handbook – Theory and Practice of Titration
- 7White paper: SiLA 2 serving the laboratory
- 8Purifying mRNA using the original PS-DVB columns and buffers for new vaccines development
- 9Which ICP-OES Optical Technology Offers Superior Performance: Echelle or ORCA?
- 10ETC Powder Dispensing Study
