Thermo Fisher UV900 Automated Acid Counter-Current Cleaning System
| Brand | Thermo Fisher |
|---|---|
| Origin | USA |
| Manufacturer Status | Authorized Distributor |
| Product Origin | Imported |
| Model | UV900 |
| Cavity Volume | 75 L |
| Heating Power | 1 kW |
| External Dimensions (L×W×D) | 530 × 850 × 1398 mm |
Overview
The Thermo Fisher UV900 Automated Acid Counter-Current Cleaning System is an engineered solution for ultra-trace-level decontamination of high-value laboratory consumables—particularly microwave digestion vessels used in ICP-MS, ICP-OES, and trace metal analysis workflows. It employs a rigorously controlled, closed-loop counter-current acid vapor cleaning principle based on sub-boiling nitric acid (HNO₃) generation. Unlike conventional soaking or ultrasonic methods, the UV900 delivers reproducible, residue-free cleaning by circulating ultra-pure nitric acid vapor at precisely regulated sub-boiling temperatures (typically 118–120 °C), enabling selective volatilization and condensation-driven removal of metallic contaminants—including refractory elements such as Cr, Ni, Pb, and U—down to sub-ppt (parts-per-quadrillion) levels. The system’s architecture integrates corrosion-resistant materials, real-time environmental containment, and process-critical safety interlocks, making it suitable for GLP/GMP-compliant laboratories where carryover risk must be eliminated between analytical runs.
Key Features
- PTFE-lined 75 L cleaning chamber with up to 55 vessel positions—optimized for standard 100 mL microwave digestion tubes
- Sub-boiling HNO₃ vapor generator using PTFE heating plates and PFA-lined steam delivery manifolds for maximum chemical inertness
- Programmable temperature control (±0.5 °C accuracy) ensures consistent vapor-phase purity and avoids thermal decomposition of HNO₃
- High-flow ultra-pure water rinse system (up to 240 L/min) delivering ≤8 L per cycle with configurable multi-stage spray sequences
- HEPA-filtered drying air supply (≤55 m³/h) with integrated temperature monitoring and overheat cutoff to prevent thermal degradation of sensitive components
- Real-time negative-pressure exhaust with alkaline granular scrubbers (e.g., NaOH or Ca(OH)₂ media) and inline pH monitoring for neutralization verification
- Automated reagent handling: programmable HNO₃ dosing (default 100 mL per cycle, adjustable), waste acid transfer, and on-demand neutralization compensation
Sample Compatibility & Compliance
The UV900 is validated for cleaning borosilicate glass, quartz, and fluoropolymer-based digestion vessels—including closed-vessel systems from Milestone, CEM, and Anton Paar. Its design adheres to ASTM D5127 (Standard Guide for Cleaning Laboratory Glassware), ISO 17025:2017 clause 5.9 (traceability of cleaning validation), and supports compliance with USP (Total Organic Carbon) and FDA 21 CFR Part 11 requirements when paired with Thermo AMASWS software audit trails. All wetted surfaces meet USP Class VI biocompatibility standards; exhaust treatment meets EPA Method 26A for acidic gas abatement.
Software & Data Management
Controlled exclusively via Thermo AMASWS Intelligent Washing Software, the UV900 provides full-cycle automation with 10 pre-validated cleaning protocols (e.g., “ICP-MS Vessel Standard,” “Ultratrace Pb Recovery,” “Multi-Element Blank Validation”). The 9-inch capacitive touchscreen interface displays real-time temperature curves, elapsed time, pressure differentials, pH trends, and fault diagnostics. All operational parameters—including acid volume, vapor dwell time, rinse count, drying duration, and neutralization endpoint—are logged with user ID, timestamp, and digital signature. Audit trails are exportable in CSV/PDF and support 21 CFR Part 11-compliant electronic records when deployed on networked, domain-authenticated workstations.
Applications
- Routine decontamination of microwave digestion vessels prior to ultra-trace elemental analysis (ICP-MS, HR-ICP-MS)
- Blank reduction in environmental testing labs processing soil, sediment, and biological tissue digests
- Preparation of certified reference material (CRM) calibration vessels requiring ≤0.1 pg/mL background
- Reconditioning of quartz ICP torch injectors and sample introduction components
- Supporting ISO/IEC 17025 method validation studies where cleaning efficacy must be documented per SOP QM-042
FAQ
What is the typical cycle time for a full cleaning sequence?
A complete program—including acid vapor exposure (60–90 min), ultra-pure water rinsing (3–5 cycles), and HEPA-assisted drying—requires 100–120 minutes depending on selected protocol.
Can the system handle alternative acids such as hydrochloric or hydrofluoric acid?
No. The UV900 is specifically engineered and validated for sub-boiling nitric acid only. Use of other acids voids warranty and compromises material compatibility and safety interlocks.
How is cleaning efficacy verified?
Users perform procedural blanks using certified reference waters (e.g., NIST SRM 1643e) analyzed by ICP-MS post-cleaning; residual signal must remain below instrument detection limits across ≥3 consecutive cycles.
Is remote monitoring supported?
Yes—via optional Ethernet-enabled AMASWS server module, allowing secure web-based status viewing and log retrieval through TLS 1.2–encrypted connections.
What maintenance intervals are recommended?
PFA tubing inspection every 6 months; HEPA filter replacement every 12 months or after 2,000 cycles; alkaline scrubber media replenishment per pH log trend (typically quarterly).
