EURPING Acide1000 Acid Counterflow Cleaning System

Overview

The EURPING Acide1000 Acid Counterflow Cleaning System is an engineered solution for trace-metal-free preparation of high-purity sample containers used in ultra-trace analytical workflows—including ICP-MS, HR-ICP-MS, and low-background radiochemical analysis. It operates on the principle of controlled acid vapor phase counterflow cleaning: ultra-pure acid (e.g., HNO₃, HCl, or HF) is heated to generate saturated vapor, which rises through precision-engineered quartz vapor conduits into vertically oriented sample vessels. Simultaneously, cooler condensate flows downward along vessel walls—creating a continuous, self-regenerating counter-current exchange that removes adsorbed metal contaminants without redeposition. Unlike open-bath or ultrasonic acid immersion methods, this closed-loop vapor-phase process ensures zero contact between cleaned surfaces and bulk liquid acid, eliminating carryover of trace metals inherently present in reagent-grade acids. The system’s all-quartz reaction chamber, PTFE-coated structural components, and pressure-balanced steam filtration architecture collectively meet the stringent cleanliness requirements of ISO/IEC 17025-accredited laboratories and USP water-for-injection validation protocols.

Key Features

• Fully automated robotic handling: Integrated mechanical arm positions acid-vapor trays precisely over the acid reservoir and seals the quartz chamber door—enabling unattended operation from loading to cooldown.
• Temperature-controlled vapor generation: Programmable heating range from ambient to 280 °C with ±1 °C stability, supporting optimized vapor pressure profiles for HNO₃ (bp 120 °C), HF (bp 19.5 °C), and mixed acid systems.
• Modular vapor conduit design: Custom-length quartz or PFA vapor delivery tubes ensure uniform internal surface exposure across vials, autosampler tubes, quartz torch injectors, and PFA/TFM digestion vessels.
• Triple-stage thermal ramping: Predefined or user-defined temperature ramps (e.g., 90 °C → 140 °C → 220 °C) enable progressive removal of organic residues, oxide layers, and strongly adsorbed cations.
• Integrated acid management: Automated acid dosing, reflux recovery, and waste drainage minimize operator intervention and reduce reagent consumption by up to 40% versus batch immersion.
• Negative-pressure exhaust system: Built-in corrosion-resistant blower maintains consistent −25 Pa chamber pressure; compatible with standard lab ductwork or optional acid-gas scrubber module (NaOH-based neutralization).
• Pressure safety architecture: Three sintered quartz steam-breathing vents on the chamber lid provide passive overpressure relief while retaining >99.99% vapor containment efficiency.

Sample Compatibility & Compliance

The Acide1000 accommodates standard and custom-configured trays holding 30 or 49 positions—compatible with 2–100 mL borosilicate glass, fused quartz, PFA, FEP, TFM, and ETFE vials, as well as ICP-MS nebulizer cones, spray chambers, and quartz torch components. All wetted surfaces are constructed from Class 1 quartz (ASTM D4177), electropolished 316L stainless steel (for non-acid-contact frames), and PTFE-coated aluminum (per ASTM F1670). The system complies with OSHA 29 CFR 1910.1200 (Hazard Communication), meets CE Machinery Directive 2006/42/EC requirements, and supports GLP/GMP audit readiness via optional electronic logbook with 21 CFR Part 11-compliant user authentication and immutable cycle records.

Software & Data Management

The Acide1000 features an embedded ARM-based controller running real-time Linux OS with a 7-inch capacitive touchscreen interface. Ten factory-loaded cleaning protocols—including EPA Method 1638 (trace metals in water), ASTM D5685 (silicon wafer rinse validation), and ISO 15195 (reference material certification)—are preinstalled. Users may create, name, version-control, and export custom methods with full parameter logging: setpoint temperatures, dwell times, acid volume, exhaust flow rate, and chamber pressure. Optional Ethernet/Wi-Fi connectivity enables remote monitoring via browser-based dashboard; data exports are generated in CSV and PDF formats with embedded digital signatures for chain-of-custody documentation.

Applications

• Preparation of sub-ppt clean vials for environmental water analysis (EPA 200.8, ISO 17294-2)
• Cleaning of ICP-MS sample introduction components to reduce polyatomic interferences (e.g., ⁴⁰Ar³⁵Cl⁺, ⁴⁰Ca¹⁶O⁺)
• Decontamination of quartz combustion boats and ashing crucibles for radiocarbon dating labs
• Surface passivation of semiconductor-grade quartzware prior to high-k dielectric deposition
• Validation of cleaning efficacy per ISO 10993-12 (biocompatibility testing device preparation)

FAQ

What acid types are validated for use with the Acide1000?
Nitric acid (≥69%), hydrochloric acid (≥37%), hydrofluoric acid (49%), and aqua regia mixtures have been verified. Use of HF requires installation of the optional HF-resistant quartz liner and dedicated exhaust scrubber.
Can the system be integrated into a cleanroom environment?
Yes—the fully sealed quartz chamber, HEPA-filtered cooling air intake, and zero-emission exhaust configuration (with scrubber) support ISO Class 5 (Class 100) cleanroom compatibility.
How is cleaning efficacy verified post-cycle?
Users perform blank analysis using 2% sub-boiling HNO₃ leachates analyzed by ICP-MS; typical results show ≤0.05 pg/mL for Fe, Cr, Ni, Cu, Zn, and Pb—meeting ASTM D5127 sensitivity thresholds.
Is routine maintenance required beyond acid replacement?
Quartz vapor conduits require visual inspection every 200 cycles; chamber gaskets are rated for 5,000 cycles; the acid reservoir pump diaphragm is replaced annually under normal usage (≤5 cycles/day).
Does the Acide1000 support multi-vessel geometry cleaning (e.g., narrow-neck vials + wide-mouth beakers)?
Yes—custom tray inserts with adjustable height stops and variable-diameter vapor guides ensure uniform vapor distribution across heterogeneous vessel arrays.