|Fat Determination by Extraction|
|How to make classical methods user-friendly and reliable?|
|Extraction Unit B-811|
extraction methods in one device
The demand for easier sample preparation in quantitative analysis (food, feed, textiles, plastics, etc.) and in residue analysis (soil, waste, etc.) has prompted Büchi to develop a new extraction system, the B-811, specifically designed to be chemically inert.
With the Universal Extraction System B-811, four different extraction methods are possible without making any changes to the unit: Soxhlet standard, Soxhlet warm, hot extraction and continuous extraction. Determination of fat according to Soxhlet can also be carried out using the B-811.
Just program the system, using the integrated control panel, to suit individual requirements such as heating level, time and number of cycles. Each program consists of three main steps (extraction, rinsing and evaporation and/or drying) with up to six additional evaporation or drying steps. Process automation reduces labour costs and, by selecting the optimal extraction conditions, also saves time.
The system has an inert gas supply to avoid oxidation during extraction and to accelerate the evaporation and drying process. With the B-811 system, high boiling point solvents (up to 150°C) need no longer be a problem and several in-built monitoring functions guarantee a high degree of safety.
|Hydrolysis Unit B-411|
|The Büchi Hydrolysis Unit B-411
is the ideal complement to the
Büchi Extraction Unit B-811.
Most often the fat is naturally embedded in the foods or feeds matrix. In this case a hydrolysis step prior to extraction becomes necessary to access the fat. The acid hydrolysis method is still required in several AOAC Official Methods and Weibull-Stoldt Method (acid hydrolysis method) to determine fat in processed food like cheese, seafood, dressings, meat, etc.
The Hydrolysis Unit B-411 provides a safe and fast acid digestion handling four samples at the same time. The powerful IR-heating system is level-controlled and allows a fast heat transfer to the sample tube. With minutes the maximum power is achieved. Since the system is equipped with a suction tube to work under vacuum the time for filtration and neutralization is remarkably minimized. The hydrolized sample is filtered through a glass sample tubes filled with quartz sand and celite which is designed to be directly used in the Extraction System B-811.
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