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04.10.2018  |  11649x
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Quality control of nuts

Distributors as well as consumer have a great interest in their products meeting quality standards. For chemical analysis and quality control is a diligent sample preparation as a prerequisite for a fine analysis essential, in order to observe the predefined critical values and tolerance values. Perfectly suitable for the comminution of nuts are the FRITSCH Cutting Mills.

Consumer protection

Food inspections concentrate on verifying harmful substances like toxins, heavy metals and non-permitted pesticides. The consumers trust that top limits of harmful substances are not exceeded and therefore contaminated products not sold. Nuts are considered a problematic product in food inspections since the shell gives no clue about whether the core has the adequate quality. The inside may contain fungal spores or toxins which simply can not be perceived from the outside. With defined methods, samples may be tested for their safety. Research and development in chemical analysis made it possible to trace toxins. This makes a constant update of the list of critical substances and their maximum amounts necessary.

Hazelnut-Spread should always taste the same!

Another important aspect in the production of food is the production of a constantly identical product. Therefore must the ingredients with each use contain exactly the same characteristics. Here the manufacturer tests each new batch from the distributor for its authenticity.
For testing of the flavour, a nutritional analysis is conducted which inspects the fat and sugar composition and therefore offers information about the taste. Additional spectroscopic analyses of the comminuted sample offer the proof for the utilization in the manufacturing.

Requirements of the sample preparation

In order to perform the full spectrum of the analysis, a representative homogenous sample is necessary. During the entire sample preparation the sample may not be subject to any type of physical or chemical influences. The affects appearing during comminution would otherwise then falsify the results of the analysis. [2] Heat for example would make any type of protein structures like micro organisms or volatile substances untraceable. Toxins would evaporate due to thermal stress. Also an extended mechanical strain may not take place, since the fats from the organic cells escape and adhere to other cell constituents in the grinding chamber.

The solution: FRITSCH Cutting Mills

The optimal air flow in the FRITSCH Cutting Mill ensures an especially high air throughput in the grinding chamber, speeds up the comminution process and protects effectively against clogging of the sieve. An additional plus of the FRITSCH Cutting Mill is the unique cutting chamber geometry: The cutting chamber is designed with minimum dead space and progressive cutting geometry between rotor and fixed knives in a manner so the sample is automatically transported and comminuted finer and finer to the desired final fineness. The sample can not collect anywhere which a glance into the opened grinding chamber shows. The result: very high throughput, small thermal load due to marginal retention period of the sample in the grinding chamber and minimised cleaning effort!

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