Aode Aode-100-2 Cross-Stream Sample Divider

Overview

The Aode Aode-100-2 Cross-Stream Sample Divider is a precision mechanical sample splitting device engineered for representative sub-sampling of dry, free-flowing granular materials—primarily coal, ores, minerals, and bulk powders—in accordance with international standard methodologies. It operates on the principle of gravitational cross-stream division: material fed uniformly across the full width of the splitter’s feed tray is directed into alternating, equally spaced chutes via a fixed array of parallel, inclined slots; each chute directs material into one of two receiving compartments, thereby achieving a nominal 1:2 mass split ratio. This design eliminates operator bias inherent in manual quartering and ensures high reproducibility in sample reduction—critical for maintaining analytical integrity in coal preparation laboratories, quality control departments, and geological survey facilities. The Aode-100-2 complies with the structural and performance requirements specified in GB/T 474–2008 (“Method for Preparation of Coal Samples”) and aligns with the functional intent of ISO 13909-2:2016 (Coal and Coke — Mechanical Sampling — Part 2: Sampling of Coal) and ASTM D2013/D2013M (Standard Practice for Preparing Coal Samples).

Key Features

• Robust, modular construction with dual configuration options: open-type and sealed-type designs for flexible integration into lab workflows or dust-sensitive environments.
• Material options include corrosion-resistant 304 stainless steel (standard for regulatory-compliant labs) and galvanized mild steel (for general industrial use).
• Chute assembly features symmetrical, identical-width slots—minimum 8 per side—with uniform spacing and ≥60° incline angle to ensure consistent flow dynamics and prevent bridging or segregation.
• No pre-mixing required prior to splitting—material is introduced directly from a scoop or feeder while oscillating laterally across the full feed width, enabling rapid, operator-guided throughput.
• Designed for ease of maintenance: all surfaces are accessible for cleaning; residual material removal is performed using non-abrasive brushes—no solvents or disassembly needed between runs.
• Stable base mounting ensures level operation on flat, vibration-dampened laboratory benches; optional anti-slip feet available upon request.

Sample Compatibility & Compliance

The Aode-100-2 is validated for use with dry particulate samples exhibiting particle size distributions where the top size is no greater than 1/2–1/3 of the slot width—ensuring free passage without jamming or channeling. Typical compatible materials include crushed coal (≤13 mm), limestone aggregates, fly ash, activated carbon, and metallurgical coke. Per GB/T 474–2008, minimum retained sample masses post-splitting are defined by input top size: 1 kg (≤1 mm), 2 kg (≤3 mm), 4 kg (≤6 mm), and 7.5 kg (≤13 mm). The device supports GLP-aligned documentation protocols when used within controlled sampling SOPs; its mechanical nature obviates electronic validation requirements but mandates periodic visual inspection and calibration verification (e.g., symmetry check of chute alignment, slot width measurement with calibrated calipers) as part of laboratory quality assurance programs.

Software & Data Management

As a purely mechanical instrument, the Aode-100-2 does not incorporate embedded electronics, firmware, or software interfaces. All operational parameters—including feed rate, oscillation amplitude, and retention time—are manually controlled and documented in laboratory notebooks or LIMS-integrated sampling logs. Its design intentionally avoids digital dependencies to ensure uninterrupted functionality in environments with electromagnetic interference, limited power infrastructure, or stringent cybersecurity policies. For traceability, users are advised to record batch identifiers, operator initials, date/time, upstream sample ID, and post-split mass measurements in accordance with ISO/IEC 17025:2017 Clause 7.5.2 (Control of Records) and internal QA procedures.

Applications

• Coal sample preparation for proximate analysis (moisture, ash, volatile matter, fixed carbon), ultimate analysis (C/H/N/S/O), and calorific value determination.
• Reduction of exploration core samples and bulk mineral concentrates prior to XRF, ICP-OES, or sieve analysis.
• Quality assurance in cement raw meal homogenization and additive blending lines.
• Preparation of reference material subsamples for inter-laboratory comparison studies.
• Field-deployable sample division in mobile geochemical labs where portability and ruggedness are prioritized over automation.

FAQ

What is the maximum particle size this divider can handle?
The Aode-100-2 is rated for feed material with a top size ≤13 mm, provided the slot width is ≥3× the largest particle. Slot dimensions are optimized per GB/T 474–2008 for this range.
Is calibration required before each use?
No routine recalibration is required; however, daily visual verification of chute symmetry, slot cleanliness, and structural integrity is mandatory under ISO/IEC 17025 and GB/T 474–2008 Annex B.
Can it be used for wet or sticky samples?
No—it is strictly intended for dry, free-flowing materials. Moisture content >5% or cohesive properties risk chute blockage and biased splitting.
Does it meet FDA or USP requirements for pharmaceutical use?
It is not designed or validated for pharmaceutical applications; no USP , , or FDA 21 CFR Part 11 compliance claims apply.
How often should the chutes be cleaned?
After every sample run—residual cross-contamination must be eliminated using lint-free brushes before introducing new material.