Expensive wideband near-infrared (NIR) analysis systems can still produce consistently inaccurate results during the homogenization of agricultural and animal feed samples. The root cause of this largely stems from rudimentary sample pre-processing.

The heterogeneity of the granular matrix creates significant random errors in the laboratory. Therefore, the application of a standardized mechanical process is crucial for the lab’s survival.

This article will provide detailed instructions on translation techniques according to the latest national standards. We will explore specialized hardware solutions that help protect the integrity of measurement data.

1. TCVN Regulations on Preliminary Sample Preparation

1.1 Requirements for Particle Size Range After Mechanical Separation

National standards stipulate very strict requirements regarding the fineness of the substrate after rough processing. Based on the technical provisions in legal document TCVN 13052 2021, the particle size of the sample batch must meet the narrow range threshold of <= 1 mm for wet chemical analysis.
Small particle size maximizes the chemical contact area with the solvent for solution extraction.
Uniform fineness eliminates light refraction when scanning the spectrum on the measuring device.
Standardized particle size helps to synchronize the wide-range hydrolysis reaction rate of macromolecules.

1.2 Cone-shaped sample splitting technique to ensure representativeness

To reduce the sample volume from a large batch to laboratory scale, we need to perform the operation correctly. The closed cone-shaped quartering method ensures even distribution of nutrient components with different densities.

This mechanical quartering process must absolutely control the loss of fine dust. In addition, cleaning the sample splitting platform is a crucial barrier to prevent cross-contamination. Strict adherence to the sample splitting SOP will ensure core representativeness for the entire production batch.

2. Non-Heat Disc Milling Technology

2.1 Consequences of Reduced Original Moisture Content from Hammer Milling

High-speed hammer mills often generate significant mechanical friction in the chamber. This friction generates heat, causing the natural water content of the grain to evaporate.

According to laboratory experimental data, high temperatures reduce the original moisture content of the sample by 0.5% to 1.5%. This directly destroys the accuracy of the calculation of total dry matter. Moisture errors lead to widespread deviations in crude protein and crude fat parameters.

2.2 Mechanical Disc Friction Mechanism Preserves Sample Integrity

Disc mill technology effectively solves the heat generation problem through a narrow-band friction mechanism. The sample’s physical and mechanical structure is separated between a fixed disc and a high-speed rotating disc.

The system supplements natural convection airflow to continuously cool the grinding chamber throughout the process. This mechanism prevents the clumping of high-fat content particles. Therefore, we maintain the natural state of the sample as required by the standard.

3. Technical Specifications of the Pfeuffer Automatic Sample Splitter

3.1 Durable High-Quality Material Splitting Tube Configuration

Duc Duong Company provides precise mechanical solutions through a standardized sample separation system. The Pfeuffer 8-model grain sample splitter from Germany is specifically designed for wide-range secondary homogenization.
Based on digitized data from the manufacturer’s official website, the splitting tube and hopper assembly are made entirely of high-grade, wear-resistant stainless steel or polycarbonate. The device operates in a completely closed system, eliminating the release of fine biological dust into the laboratory air. This hardware structure ensures that the splitting ratio between sample collection cups is always absolutely uniform with minimal error.

Sample splitter for homogenizing agricultural product and animal feed samples according to TCVN 13052, manufactured by Pfeuffer

3.2 Ability to Process Diverse Groups of Raw Agricultural Grains

The device has a wide operating range, smoothly processing groups of grains with different physical and chemical sizes. The machine operates efficiently, handling everything from raw agricultural grains (corn, wheat, sunflower) to concentrated animal feed pellets.
The process of separating large batch samples into 8 representative portions is incredibly fast and efficient, optimizing machine operation. The electric motor runs smoothly with a stable rotation speed, completely preventing grain jamming at the discharge port or uneven separation due to centrifugal force. This is a crucial investment in a technical control booth that helps the R&D and QC departments completely eliminate random errors caused by manual operation.

4. Large Orbital Mixing Dynamics

4.1 Combined Circular and 3D Motion Mechanism

The liquid-solid solvent dissolution and extraction cycle requires robust dynamics. The combination of orbital shaking and narrow-band 3D tumbling motion creates a new breakthrough.
The continuous multi-directional fluid convection force the sample particles to collide with the liquid phase. This photomechanical process helps to completely remove traces of mycotoxins. The dynamic factor determines the consistency of the slope of the physicochemical analysis data.

4.2 Slope Load Capacity Configuration of the 3D-300 Model

To handle continuously large sample volumes, the lab needs a robust mechanical system. The large-capacity 3D-300 Orbital Shaker with 3D Shaking, distributed by Duc Duong, fully meets this requirement.
Based on the digitized technical specifications from the official FinePCR website, the shaking platform can withstand a maximum slope load of up to 10 kg. The device incorporates a brushless DC motor, ensuring smooth operation and minimizing mechanical vibration in the workshop floor.

The Fine PCR shaker ensures homogeneity of agricultural and animal feed samples

5. Mechanism of Toxin Extraction Using a Rotator Disc Shaker

5.1 Flexible Tilt Angle and Sample Kinematics

The rotating disc shaking technique offers superior efficiency thanks to its flexible tilt angle adjustment. We can freely set the tilt angle from 0° to 90° on the mechanical rotation axis.

This mechanism forces the test tubes containing the sample substrate to continuously flip against gravity. The chemical contact area between the solid phase and the liquid phase of the solvent increases to the maximum slope d. The toxin or antibiotic extraction process is significantly shortened.

5.2 Multi-Position Operating Parameters of the HAG FinePCR Series

Bulk sample screening requires an auxiliary hardware system with high working efficiency. The high-end HAG Korean Rotator Disc Shaker series synchronizes standard data with the manufacturer FinePCR.
The mechanical stage is equipped with a multi-position, angled clamping system that securely holds the sample tube. A narrow range of rotational speed (RPM) control allows for precise fine-tuning via the digital control panel. The heavy cast metal construction effectively absorbs mechanical shocks, ensuring the safety of the system.

Fine PCR disc shaker distributed by Duc Duong

6. Cross-contamination Control of Sample Preparation Equipment

6.1 SOP Procedure for Cleaning the Mechanical Disc Grinding Chamber

Maintaining the cleanliness of the grinding chamber is a mandatory rule to prevent the risk of systematic errors. The SOP procedure stipulates that the inspector must clean the mechanical cutting disc after each batch of samples.
We use high-pressure compressed air combined with a fine, thin brush to blow away the dust from the slope. This slope operation completely removes any remaining concentrated pellet sample residue from the slope. Recording the process in a written logbook helps the lab prepare for quality audits.

6.2 Measurement Verification Cycle according to ISO 17025

Regular legal maintenance of the sample preparation system is a mandatory requirement of Clause 6.4. The recommended frequency for calibrating the shaker speed sensor is once every 12 months.
Duc Duong’s solution engineering team provides comprehensive technical services for businesses. We are committed to supplying genuine replacement parts with complete national CO/CQ certification documents. This hardware synchronization ensures a consistently stable quality management cycle in the factory.

Conclusion

In summary, building an automated sample pre-processing solution plays a crucial role in protecting lab data. We need to comply with the national standard TCVN 13052 2021 regarding the fineness gradient of the sample layer (<=1 mm). Integrating Milomat Pfeuffer non-heat-generating cutting disc technology and the 3D-300 FinePCR large-scale orbital shaker helps eliminate errors. Duc Duong Science and Technology Company is proud to offer a complete, officially licensed solution in Vietnam.

To receive an immediate quote and a catalog of hardware specifications for disc mills and sample shakers that meet TCVN 13052 2021 standards, please leave your information in the Contact Us form to receive in-depth support from our project engineers.

 

DUC DUONG SCIENCE AND TECHNOLOGY COMPANY

Address: 1014/67 Tan Ky Tan Quy, Binh Hung Hoa Ward, Binh Tan District, Ho Chi Minh City

Tel: (028) 3762 8042 – 3762 8043 – 3750 8514 – 3750 8793

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Email: ducduong@ducduongco.com

Website: ducduongco.com

ZALO OA: DUC DUONG SCI

 

FAQ

1. Why is the disc mill technology of the Milomat series superior to the traditional hammer mill mechanism?

The disc mill mechanism of Pfeuffer operates based on the mechanical friction force of a narrow slope between two ultra-durable alloy steel surfaces. This mechanical dynamic principle does not generate the large amount of frictional heat like the impact blades of a hammer mill. The advantage of the slope helps to preserve the original natural moisture content of agricultural products (avoiding the loss of 0.5% to 1.5% bound water), protecting the integrity of the test sample in accordance with the legal technical standards of TCVN 13052 2021.

2. How does 3D rocking support the extraction of Mycotoxins?

The 3D rocking establishes a continuous multi-directional fluid convection flow inside the lab’s Erlenmeyer flask. The kinetics of the rotary shaker continuously flips and tumbles the solid substrate particles against gravity, impacting them against the liquid organic solvent. This tumbling process maximizes the chemical contact area, thoroughly separating any adhering mycotoxins and optimizing the biochemical nutrient screening cycle.

3. What mechanical benefits does freely adjusting the tilt angle of the plate from 0° to 90° on the Rotator shaker provide?

The flexible tilt angle range allows R&D specialists to actively change the tumbling dynamics of the test tube based on the physicochemical viscosity characteristics of the sample. When the tilt angle is set to 90° (the sample tube rotates vertically along its axis), the mechanical tumbling force reaches its strongest level in the upper structure. This tumbling mechanism completely separates dense, hard-to-dissolve mixed seafood pellets, ensuring a uniform separation process before centrifugation.

4. What technical containment steps must be followed in the Milomat disc mill cleaning SOP procedure to prevent cross-contamination?

To achieve ISO 17025 measurement certification, the disc mill must be thoroughly cleaned of residual fine dust between batches using a high-pressure compressed air spray system combined with a fine, diluted brush. Inspectors must absolutely not use wet cleaning solutions inside the chamber to avoid the risk of activating local humidity causing subsequent batches of particles to stick together. The entire mechanical cleaning process must be digitally recorded in the factory’s machine operation logbook.

5. What legal cycle intervals are required for the sensors of the FinePCR mixing shaker system to check for errors?

To ensure measurement consistency and adherence to Clause 6.4 of the international standard ISO 17025, the rotational speed (RPM) sensors and real-time clock circuit of the shaker must be calibrated periodically. Experts recommend establishing a maintenance and calibration cycle for the slope control booth every 12 months to ensure slope stability. Checking the mechanical error of the slope, combined with Duc Duong’s after-sales technical service package, ensures that QC data is always accurate, serving the purpose of factory safety acceptance documents.