PreeKem Yitao S1 Sub-boiling Acid Purification System

Overview

The PreeKem Yitao S1 Sub-boiling Acid Purification System is an engineered solution for the production of ultra-high-purity inorganic acids—specifically nitric acid (HNO₃), hydrochloric acid (HCl), hydrofluoric acid (HF), and deionized water—required in trace-metal analysis laboratories. Operating on the principle of sub-boiling distillation, the system maintains liquid-phase equilibrium just below the boiling point, minimizing volatile impurity carryover and suppressing aerosol formation. This thermodynamically controlled process ensures that only pure vapor phase condensate is collected, effectively separating metal contaminants (e.g., Fe, Al, Cu, Cr, Ni, Pb) from the feed acid. The S1 achieves purification from initial concentrations at ~1 ppb down to consistent output levels ≤10 ppt (parts-per-quadrillion), meeting stringent requirements for ICP-MS, ICP-OES, and EPA Method 200.8/6020B sample preparation workflows.

Key Features

• 3D Energy-Focused Radiant Heating: Patented circumferential quartz-glass heating mantle delivers uniform thermal distribution across the evaporation surface—eliminating hot spots and ensuring stable sub-boiling conditions without localized boiling or bumping.
• Spherical Condensation Chamber: Large-angle hemispherical condenser geometry maximizes surface area and thermal gradient, enabling rapid vapor-to-liquid phase transition with minimal back-diffusion and high collection efficiency.
• Bottom-Inlet Acid Loading: Feed acid enters the distillation chamber from the base, preventing splash contamination and eliminating headspace exposure—critical for maintaining integrity of ultra-trace analyte blanks.
• Zero-Metal Contact Architecture: Entire fluid pathway—including evaporation vessel, condenser, and receiver—is constructed exclusively from high-purity fused quartz and PTFE. No stainless steel, nickel, or quartz-to-metal seals are used, eliminating leaching risks and corrosion-induced particulate generation.
• Unattended 24/7 Operation: Fully autonomous cycle control supports continuous purification; typical throughput: 1.8 L of ≥69% HNO₃ per 24 h at ≤10 ppt metal residue levels.
• Low-Energy Consumption: Average power draw <150 W during steady-state operation—optimized for long-term deployment in fume hoods without thermal load compromise.

Sample Compatibility & Compliance

The S1 is validated for use with concentrated nitric acid (65–70%), hydrochloric acid (35–37%), hydrofluoric acid (48–49%), and ultrapure water (18.2 MΩ·cm). It complies with material compatibility standards for Class I cleanroom-grade acid handling (ISO 14644-1 Class 5 equivalent environment). While not certified to a single harmonized standard, its design aligns with analytical best practices defined in ASTM D5127 (Standard Guide for High-Purity Water Used in Semiconductor Processing), ISO/IEC 17025:2017 (Clause 5.4.2 on reagent purity), and USP (Water for Pharmaceutical Purposes). All wetted components meet SEMI F57 specifications for semiconductor-grade quartzware.

Software & Data Management

The embedded control interface features a resistive touchscreen with intuitive navigation and pre-loaded method templates for common acids. Real-time temperature profiling (±0.3 °C accuracy) is displayed graphically, with user-defined setpoints and ramp/soak parameters. System logs—including runtime, peak temperature, condensate volume estimates, and fault events—are timestamped and exportable via USB. Audit trail functionality meets GLP/GMP documentation expectations, supporting 21 CFR Part 11 readiness when integrated into validated laboratory information management systems (LIMS). No cloud connectivity or remote access is implemented—data sovereignty and network isolation are preserved by default.

Applications

• Preparation of calibration standards and matrix-matched blanks for trace elemental analysis (ICP-MS, HR-ICP-MS, ICP-OES)
• Acid digestion reagent purification prior to microwave-assisted digestion (EPA 3052, ASTM D5762)
• Production of low-background acids for nuclear fuel cycle analysis and environmental radiochemistry
• Supporting ISO/IEC 17025-accredited testing laboratories requiring documented reagent purity verification
• On-site purification in centralized core facilities where centralized acid supply infrastructure is unavailable or unreliable

FAQ

What acid concentrations can the S1 purify?
The system is optimized for concentrated stock solutions: HNO₃ (65–70%), HCl (35–37%), HF (48–49%), and ultrapure water (18.2 MΩ·cm). Dilute solutions are not recommended due to reduced thermal efficiency and potential condensate dilution.
Does the S1 require consumables or periodic replacement parts?
No consumables are required. The fused quartz evaporation chamber and condenser are lifetime components under normal operating conditions. Routine cleaning with high-purity water and mild alkaline rinse (e.g., 0.1 M NaOH) is sufficient between acid types.
Can the S1 be installed inside a standard laboratory fume hood?
Yes. Its compact footprint (W × D × H: 280 × 320 × 510 mm), low heat dissipation (<150 W), and fully enclosed vapor path make it compatible with ANSI/AIHA Z9.5-compliant ducted fume hoods.
How is safety ensured during extended unattended operation?
Six independent hardware-level safeguards include: (1) dual-stage thermal cutoff (cut-off at 120 °C, auto-resume below 95 °C), (2) dry-run detection via thermal inertia monitoring, (3) pressure-relief valve calibrated to ±0.5 kPa, (4) anti-tip base with >30° stability margin, (5) optical liquid-level sensor in receiver, and (6) fail-safe power-down on communication loss.
Is validation support provided for IQ/OQ/PQ protocols?
Yes. PreeKem supplies a comprehensive User Requirement Specification (URS) template, Factory Acceptance Test (FAT) report, and blank test data package (including ICP-MS results for 30+ elements) to support installation qualification (IQ), operational qualification (OQ), and performance qualification (PQ) activities.