Rxin QCL-5 Integrated Sample Preparation Station for Food Safety Testing

Overview

The Rxin QCL-5 Integrated Sample Preparation Station is an engineered solution designed specifically for rapid, field-deployable sample preparation in food safety laboratories and on-site inspection environments. It consolidates seven critical pre-analytical unit operations—centrifugal phase separation, vortex mixing, water bath incubation, homogenization, nitrogen/air-assisted solvent evaporation (concentration), precise timing control, and temperature-regulated heating—into a single, compact, mobile platform. Built upon modular electrical isolation architecture, each functional module operates independently with dedicated power regulation and thermal management, ensuring operational continuity even if one subsystem undergoes maintenance or fault recovery. The system employs Peltier-assisted rapid thermal response for water bath and heating blocks, coupled with PID-controlled digital thermostats and auto-tuning algorithms to maintain ±0.5 °C stability across the 0–100 °C operating range. Its design aligns with GLP-compliant workflows for residue analysis in aquatic and livestock-derived commodities, supporting regulatory methods outlined in ISO 17025-accredited laboratories and harmonized with AOAC Official Methods® and EU Commission Regulation (EU) No 2021/808 for veterinary drug residue quantification.

Key Features

• Modular, electrically isolated functional units: centrifugation, vortex mixing, water bath, homogenization, air-assisted concentration, programmable timer, and adjustable-height concentrator manifold
• Integrated air pump (0–50 L/min flow, oil-free diaphragm type) eliminating external gas cylinder dependency for nitrogen-free evaporation
• Motor-driven stainless-steel concentrator arm with 0–100 mm vertical travel, compatible with 1.5–15 mL conical tubes and standard microcentrifuge formats
• Dual-mode homogenization: high-speed rotor-stator (18,000–23,000 rpm) with food-grade polymer housing and thermal cut-off protection; continuous run ≤30 s, minimum 2 min cooling interval
• Vortex mixer with 2800 oscillations/min amplitude, accommodating vessels from 5–250 mL; momentary activation mode for controlled dispersion
• 12-position heated block (200 W max) and independent water bath chamber, both digitally controlled (LED & digital display), featuring over-temperature shutdown and real-time temperature feedback
• Retractable telescoping handle (80 cm height) and dual-bearing nylon casters enabling stable transport across laboratory floors and field terrain
• Embedded alarm system with audible buzzer and visual status indicators for timer completion, temperature deviation, and motor stall detection

Sample Compatibility & Compliance

The QCL-5 supports diverse biological matrices common in food residue testing—including fish muscle, poultry liver, milk, honey, and egg homogenates—without cross-contamination risk due to physically segregated modules and autoclavable stainless-steel contact surfaces. All wetted components comply with FDA 21 CFR §177.2440 (food-contact plastics) and EU Regulation (EC) No 1935/2004. The centrifuge rotor meets ISO 15189 mechanical safety requirements for angular acceleration and imbalance tolerance. Temperature control modules are traceable to NIST-certified reference standards. The device is suitable for use in workflows aligned with ISO/IEC 17025:2017 clause 6.4.3 (equipment verification), and its timed evaporation function supports method validation per ICH Q2(R2) guidelines for robustness assessment.

Software & Data Management

The QCL-5 operates via embedded firmware with no external PC dependency. All parameter settings—including centrifugation speed (0–4000 rpm), concentration duration (1 s–99 h), water bath setpoint (0–100 °C), and homogenizer duty cycle—are stored in non-volatile memory with timestamped event logging. While not equipped with network connectivity or remote software, it provides full audit trail capability through front-panel LED history recall and manual logbook integration. Each operation generates a unique session ID, facilitating traceability during internal audits or regulatory inspections under FDA 21 CFR Part 11 (where electronic records are manually transcribed and signed).

Applications

• Routine screening of veterinary drug residues (e.g., sulfonamides, fluoroquinolones, tetracyclines) in aquaculture and meat samples prior to LC-MS/MS analysis
• Pre-concentration of pesticide extracts from honey and fruit juice matrices using air-assisted evaporation under controlled thermal conditions
• Cell lysis and protein solubilization in dairy product allergen testing workflows
• Standardized homogenization of viscous food pastes (e.g., infant formula, pet food) for uniform subsampling
• Temperature-controlled enzymatic digestion steps in mycotoxin extraction protocols (e.g., aflatoxin B1 in corn)
• Field-deployable sample stabilization for time-sensitive analytes requiring immediate centrifugation and cold storage integration

FAQ

Does the QCL-5 support nitrogen gas purging for oxygen-sensitive analytes?
No—it utilizes compressed ambient air generated by its integrated oil-free diaphragm pump. For inert-atmosphere applications, external nitrogen supply must be connected via optional adapter kit (not included).
Can the centrifuge accommodate 50 mL conical tubes?
No—the rotor is configured for 15 mL angled tubes only (6-place capacity). Adapters for alternative tube formats are not supported.
Is firmware upgrade capability available?
Firmware updates require authorized service technician intervention using proprietary diagnostic interface; end users cannot perform upgrades.
What is the maximum allowable ambient operating temperature?
35 °C continuous operation, with derating above 30 °C recommended for prolonged homogenization cycles.
Are calibration certificates provided with shipment?
A factory-issued temperature and timer calibration report is included; ISO/IEC 17025-accredited third-party calibration is available upon request at additional cost.