Laboratory Sample Homogenizer

What is the Laboratory Sample Homogenizer?

A blender or rotor-stator device that mixes and disintegrates fresh agricultural samples into a uniform slurry. It is the right choice for residue, enzyme and slurry analysis where a consistent, homogeneous subsample is essential.

Overview

The laboratory homogenizer uses rotating blades or a rotor-stator probe to shear, chop and mix plant tissue, fruit, vegetables, feed or silage into a uniform slurry. A representative subsample can then be taken for extraction or direct analysis, because whole pieces and juice are evenly distributed. Rotor-stator probes work in beakers or tubes and are suited to small volumes and tough tissue, while blenders handle larger batches and fibrous material. Speed, time and probe geometry are chosen to avoid overheating, which would degrade pesticides, vitamins and enzymes, and cooling jackets or short intervals limit temperature rise. Cross-contamination is a major risk in residue work, so probes and jars are cleaned with detergent and solvent, and disposable options are used when needed. Homogenising also releases enzymes that can alter analytes, so extraction should follow promptly, and the homogenate is kept cold.

How does it work?

Agricultural samples must be reduced to a uniform, representative state before analysis. Grinding uses cutting blades, hammer mills, rotating knives or bead beating with a cryogenic or ambient medium, breaking cell walls and reducing particle size so that extraction is complete and reproducible. For fibrous forage and feed, a hammer mill with a screen controls the final particle size. Rotary and riffle dividers split a flowing or falling stream of material into equal portions, so a subsample reflects the bulk composition even when particles differ in size or density. Sieve shakers classify particles by size with vibratory, tapping or air-jet action, and the retained fractions can be weighed to check grind quality. Blenders and homogenisers mix and disintegrate fresh tissue or slurries for residue and enzyme work. Moisture loss, heat generation and contamination are the main risks to control.

What are the key features?

• Rotor-stator or blade action produces a uniform slurry.
• Variable speed and time suit soft and tough tissues.
• Small-volume probes work in tubes and beakers.
• Cooling options limit heat degradation of analytes.
• Disposable accessories reduce residue cross-contamination.
• Consistent homogenate improves subsampling representativeness.

What are the technical specifications?

A typical laboratory sample homogenizer configuration offers homogenising principle of Rotor-stator probe or blade blender, speed range of 1,000–30,000 rpm, sample volume of 0.5 mL – 2 L, probe diameter of 5–20 mm, processing time of 10 s to 5 min and temperature control of Cooling jacket or intermittent use. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Laboratory Sample Homogenizer is used in pesticide residue sample homogenisation, enzyme and metabolite assays, fruit and vegetable quality testing and silage and feed slurry preparation. Across the wider Agricultural Sample Preparation class, laboratories also deploy it for plant tissue nutrient analysis, feed and forage composition testing and pesticide residue sample preparation.

Which standards and certifications apply?

Relevant standards and methods include ISO 6498 (feed sample preparation), ISO 11464 (soil pretreatment), ISO 24333 (cereals sampling), ISO 6644 (cereals automatic sampling) and EN 14780 (solid biofuels). Certification candidates for this model are CE, RoHS and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Clean equipment thoroughly between samples with brushes and, where needed, solvent or dilute acid, and run blank grinds to detect carry-over of previous samples. Keep grinding brief or cooled to avoid heat that degrades proteins, sugars and volatile compounds, and weigh samples quickly to limit moisture change. For trace analysis, control contamination from blades, sieves and containers, and use appropriate reference materials. Verify grind quality by sieving a subsample and checking that the specified fraction meets the method requirement, and retain a portion of the prepared sample for repeat analysis. Log sample identity, preparation method, particle size and operator, and store prepared samples in sealed containers at the temperature the method requires.

How do I select the right Laboratory Sample Homogenizer?

Select the homogenizer when fresh or wet samples must be reduced to a uniform slurry for extraction or direct measurement. For dried materials, a mill is more appropriate. In an RFQ, specify probe diameter, volume range, speed and whether cooling or disposable accessories are needed.

How does it compare with other Agricultural Sample Preparation variants?

Begin with the analytical method, because it fixes the required particle size, sample mass and freedom from contamination. For trace element work, choose grinding surfaces that do not release the elements of interest, such as agate, zirconia or PTFE, and avoid stainless steel when chromium or nickel is measured. For fresh plant tissue and residue analysis, a cryogenic or high-speed homogeniser preserves labile compounds. For fibrous forage and feed, select a hammer mill with the screen size specified by the reference method, and add a divider so that the ground material can be reduced without segregation. Use a sieve shaker to verify grind quality and to prepare defined size fractions. Consider throughput, cleaning between samples, dust control and the risk of moisture change, and confirm that the equipment can meet the standard sample preparation procedure for the analysis planned.