Gerhardt VAPODEST 200 A Cyanide Distillation Unit
| Brand | Gerhardt |
|---|---|
| Origin | Germany |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Country of Origin | Imported |
| Model | VAPODEST 200 A |
| Instrument Type | Laboratory Benchtop Distillation System |
| Water Consumption | ~5 L/min |
| Distillation Time | 2–4 min |
| Power Rating | 2200 W |
| Frequency | 50/60 Hz |
| Weight | 25 kg |
| Dimensions (W×D×H) | 527 × 390 × 697 mm |
| Repeatability | ±1% |
| Detection Limit | 0.1 mg |
| Supply Voltage | 230 V AC |
| Recovery Rate | ≥99.5% |
| Quality Certification | Compliant with EN ISO 9001 throughout design, production, and shipment |
Overview
The Gerhardt VAPODEST 200 A is a fully automated, benchtop steam distillation unit engineered for the precise and reliable determination of free, weak-acid dissociable (WAD), and total cyanide in aqueous environmental and industrial samples. It operates on the principle of acidification under controlled steam distillation—per ASTM D7365, ISO 14403-1, and DIN 38405-26—ensuring quantitative transfer of volatile cyanide species (e.g., HCN) into a receiving solution for subsequent colorimetric or electrochemical quantification. As the entry-level model in the VAPODEST series, the 200 A delivers robust performance for laboratories with moderate throughput requirements, combining German engineering heritage with intuitive procedural automation. Its design eliminates manual reagent addition and steam flow adjustment, reducing operator dependency while maintaining full traceability and method compliance.
Key Features
- Fully automated reagent dosing system with programmable timing and volume control for acid (H3PO4) and NaOH, minimizing cross-contamination and human error.
- Adjustable steam generation (10–100% capacity) enables optimization for diverse sample matrices—including wastewater, surface water, leachates, and plating bath solutions—without hardware modification.
- Integrated LCD interface displays real-time status of each distillation phase (pre-heating, acidification, distillation, cooling), along with diagnostic codes for immediate fault identification and resolution.
- Stainless steel reaction chamber and condenser assembly ensure long-term corrosion resistance against aggressive acidic vapors and repeated thermal cycling.
- Compliance with EN ISO 9001:2015 across the entire product lifecycle—from R&D and component sourcing to final calibration and shipping—guarantees consistent manufacturing quality and documentation integrity.
- Engineered for low maintenance: self-cleaning steam pathways, modular heating elements, and standardized consumables support >10 years of operational continuity under GLP-compliant laboratory conditions.
Sample Compatibility & Compliance
The VAPODEST 200 A accommodates standard 500 mL borosilicate distillation flasks and accepts sample volumes from 50 to 500 mL. It supports both single-step total cyanide digestion (with UV/persulfate pretreatment) and direct distillation for free cyanide analysis. Method validation data confirm full alignment with regulatory frameworks including EPA Method 414.2, ISO 14403-1:2012 (determination of total cyanide), and DIN EN ISO 11259 (water quality—determination of cyanide). All distillation parameters—including temperature ramp profiles, steam dwell time, and receiver cooling duration—are configurable and logged with timestamped audit trails, satisfying FDA 21 CFR Part 11 requirements when paired with Gerhardt’s optional LIMS-integrated software module.
Software & Data Management
While the VAPODEST 200 A operates as a standalone instrument via its embedded microcontroller, it features RS-232 and optional Ethernet connectivity for integration into centralized laboratory informatics systems. Gerhardt’s optional VAPOSOFT Pro software enables remote method deployment, batch scheduling, electronic signature capture, and automatic export of CSV/Excel reports containing sample ID, distillation time, steam intensity, recovery check results, and QC flag status. All data entries are immutable post-generation, supporting ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) for GMP and environmental accreditation audits.
Applications
- Regulatory monitoring of cyanide in municipal and industrial effluents per EU Directive 2006/11/EC and U.S. Clean Water Act discharge limits.
- Quality control in electroplating, mining, and metal finishing facilities where cyanide-based complexing agents are used.
- Environmental site assessment of contaminated soils and groundwater using TCLP-extracted leachates.
- Research applications requiring high-recovery distillation prior to IC, ICP-MS, or amperometric detection.
- Reference laboratory use for method verification and interlaboratory comparison studies under ISO/IEC 17025.
FAQ
What is the recommended maintenance interval for the VAPODEST 200 A?
Routine cleaning of the condenser and steam nozzle is advised after every 20 distillations; annual calibration verification of steam flow rate and temperature sensors is recommended for GLP compliance.
Can the instrument be validated for 21 CFR Part 11 compliance?
Yes—when operated with VAPOSOFT Pro and configured with user access controls, electronic signatures, and audit trail logging, the system meets predicate rule requirements for electronic records and signatures.
Is the 0.1 mg detection limit applicable to all cyanide species?
The stated detection limit refers to total cyanide expressed as CN⁻ in a 500 mL sample; actual sensitivity depends on downstream detection method (e.g., pyridine-barbituric acid assay LOD ≈ 2 µg/L).
Does the unit require external cooling water or chilled recirculator?
No—the integrated Peltier-cooled condenser operates autonomously; only tap water supply (5 L/min at 10–25 °C) is required for steam generation.
