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?
Strategies for the Efficient Determination of Protein Content of Homogeneous and Inhomogeneous SamplesDr. Werner Küppers
Today, the question of speed and cost efficiency seems more relevant than ever in light of our need to conserve resources. The DUMATHERM® nitrogen analysis device, produced by C. Gerhardt GmbH & Co. KG, in Königswinter, Germany and operated according to the Dumas method, shows that these challenges need no longer be irreconcilable. Combustion catalysts without chrome constituents, non-toxic absorbents for water and carbon dioxide, as well as chemical-free solutions for the separation of carbon dioxide from the analytical gas stream, demonstrate this fact conclusively. If we are then able to use micro sample weights in place of gram weights on the basis of intelligent analytical technology, we can consequently view the combustion analysis in a new light, as it becomes a real alternative to both secondary methods and the Kjeldahl reference method. This article aims to establish whether gram sample weights are still viable today, or whether intelligent detection technology paired with efficient equipment design render gram weights redundant. Flour and soybean are taken as sample matrices.
- Dumas principle
- nitrogen determination
- protein analysis
- protein characterization
- nitrogen analysis
- protein content measurement
- Kjeldahl analysis
Cost efficiency and the conservation of resources are very often a contradiction. The protein/nitrogen analysis system DUMATHERM brings both demands together more
Excellent alternative for sample cleanup of volatiles from complex matrices. Major advantages are the low costs for consumables per analysis more
VAPODEST is currently the most modern and powerful analysis system on the market for nitrogen analysis using the Kjeldahl method more
KJELDATHERM digestion units are automated block digestion systems which deliver reproducible digestion conditions more
Available with a unique manual sample loader or an autosampler for up to 120 samples DUMATHERM performs according to international standards and regulations more
A high degree of precision and universality make the Kjeldahl method the world’s leading standard method for determining the nitrogen content in food and feedstuffs as well as in soil and water samples. This versatile method is also found in the general or pharmaceutical industries, or wher ... more
DUMATHERM® technology has established itself as a key component of food and animal feed laboratories. The sturdy, powerful DUMATHERM analytics system provides valid reference results cleanly, quickly and steadily. And it can do so in almost any location with the appropriate gas infrastructu ... more
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. In the field of biogas production, the fibre fractions of substrates in fermenters are determined in order to distinguish the carbohydrates ... more
- 1Microwave freeze drying of fruits & vegetables
- 2Which ICP-OES Optical Technology Offers Superior Performance: Echelle or ORCA?
- 3Comparing ICP-OES Analyzers' Plasma Views: Axial, Radial, Dual, MultiView, and New Dual Side-On Interface
- 4Discover the future of HPLC and ELISA today
- 5Polyether-Modified Silicones for Cosmetic Applications
- 6X--ray Fluorescence Analysis of Polymers
- 7Which ICP-OES Optical Technology Offers Superior Performance: Echelle or ORCA?
- 8Field-Flow Fractionation - The Universal Separation Principle for Particle and Macromolecule Characterization
- 9Why Flame AAS Users Are Moving Up to ICP-OES
- 10Automated Dynamic Light Scattering