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In the food industry, sample preparation is very important, and often the sample is not homogeneous which can make analysis inaccurate. Some components are too magnified, and some components are lost, so a homogeneous sample is the basis for reliable and accurate analytical results.

In order to quickly obtain homogeneous samples with the fineness required for analysis, a grinder is a reliable choice. It efficiently pulverizes samples to a homogeneous state and avoids uneven distribution or loss of components, providing consistency and accuracy for subsequent assays.

The knife mill is an indispensable equipment for the preparation of food samples which can compensate for the lack of homogenization in manual operation.

If the food sample is not representative or the degree of homogenization is insufficient in the preliminary preparation stage, it will directly affect the subsequent inspection work, and the analysis results are very likely to be biased. For example, problems such as outliers, data discreteness, or reproducibility differences that are common in detection are due to inhomogeneous samples. This will not only deviate from the true value of the inspection, but also may affect the accuracy of the final judgment and even delay the completion of the inspection work on time.

Composition of a knife grinder

Titanium Head

Stainless steel Head

Ordinary top cover

Gravity top cover

Overflow cover

Plastic Jars

Advantage

Efficient grinding: The blade rotates at high speed and can quickly process a wide range of substances including dry samples, wet samples, and samples with high fiber or fat.

Homogenized samples: The ability to evenly pulverize the sample ensures a consistent distribution of components across all parts of the sample, providing high-quality samples for subsequent analysis.

Wide applications: It is suitable for crushing and mixing many types of samples such as food, medicine, plant tissue, soil, plastic, etc.

Easy to clean: The design structure is usually easy to disassemble and clean, and the accessories can be autoclaved to avoid cross-contamination.

A variety of grinding jars are available: with different material heads, the zigzag head makes hard samples and samples containing high fat better homogenized and the grinding efficiency is much higher.

Let's take a look at the grinding effect of the Welso knife mill for vegetable and meat samples.

Vegetables

Its chemical composition (sugar, protein, vitamins, etc.) is prone to change during storage and most of them are determined by fresh samples.

Take samples with hard tissue structure and rich water content, such as greens, cucumbers, eggplants, etc., as examples to see the performance of the knife mill.

Result: High degree of homogenization, sample particles less than 1 mm (as shown in the figure), meet the experimental requirements of pesticide residue detection.

Meat

For livestock, poultry and fish meat samples, samples are taken from the whole muscle area and then ground, and if harmful residues are detected, tissues or sites where the residue is enriched.

Results: The sample reached uniform mass and the homogenization effect was less than 1 mm, which met the experimental requirements of heavy metal and pesticide residue detection

After being processed by a knife mill, these food samples can better ensure the uniform distribution of ingredients, avoid errors, and ensures accurate experimental analysis.