Sulfur Dioxide Residue Analyzer CH-6000C by HUANKONG

Overview

The HUANKONG CH-6000C Sulfur Dioxide Residue Analyzer is a fully integrated, automated distillation and titration system engineered for precise quantification of residual sulfur dioxide (SO₂) in herbal medicines, food matrices, and agricultural products. It operates on the principle of nitrogen-purged steam distillation followed by iodometric titration — a method rigorously defined in the 2010 Edition of the Chinese Pharmacopoeia (Second Supplement), NY/T 1435–2007, and NY/T 1373–2007. The instrument consolidates critical unit operations—including far-infrared heating, programmable nitrogen flow control, circulating water condensation, magnetic stirring, anti-suckback protection, and endpoint-detectable titration—into a single compact platform. Designed for unattended operation under microprocessor control, it eliminates manual intervention during distillation and titration cycles while maintaining strict adherence to pharmacopeial apparatus specifications (e.g., two-neck round-bottom flasks, calibrated separatory funnels, reflux condensers). Its architecture supports GLP-compliant workflow integrity through parameter logging, user-accessible method storage, and hardware-level safety interlocks.

Key Features

• Fully automated nitrogen-assisted distillation with independent temperature and time programming per channel (2/4/6-channel configurations available)
• Far-infrared radiation heating modules offering high thermal conversion efficiency (>92%), extended service life, and uniform heat distribution across high-purity anodized aluminum heating bowls
• Integrated intelligent magnetic stirring system with per-channel speed adjustment, ensuring homogeneous mixing in receiving flasks during titration
• Plug-and-play titration platform with precision iodine burette mounting; compatible with standard 10 mL or 25 mL Class A volumetric burettes
• Color LCD interface with dual-input operation (rotary encoder + tactile keys); full-screen menu navigation and real-time status visualization
• Modular mechanical design enabling isolated operation of each distillation unit — no cross-contamination or thermal interference between channels
• Adjustable nitrogen flow control via six independent rotameters, allowing fine-tuned inert gas purging (0–10 L/min range per channel)
• Dedicated cooling water inlet/outlet ports compliant with standard laboratory recirculating chillers (8–15 °C supply recommended)
• Comprehensive safety suite: boil-over suppression, anti-backflow check valves, overtemperature cutoff, and dry-run detection

Sample Compatibility & Compliance

The CH-6000C is validated for use with solid and semi-solid botanical samples (e.g., dried herbs, sliced roots, processed rhizomes), fruit and vegetable tissues, mushroom products, and processed food ingredients. It meets all physical configuration requirements specified in the Chinese Pharmacopoeia 2010 Edition (Second Supplement) for SO₂ residue testing apparatus. Method equivalence has been demonstrated against reference procedures in NY/T 1435–2007 (total SO₂ in fruits and vegetables) and NY/T 1373–2007 (sulfites in edible fungi via nitrogen distillation–spectrophotometry). While not pre-certified to ISO/IEC 17025 or FDA 21 CFR Part 11, the system supports audit-ready data handling when paired with validated LIMS or electronic lab notebook (ELN) integration. All wetted parts are constructed from chemically resistant materials (borosilicate glass, PTFE-lined joints, anodized aluminum), ensuring compatibility with acidic distillates and iodine-based titrants.

Software & Data Management

The embedded firmware provides non-volatile storage for up to 100 user-defined methods, each configurable with target temperature profiles, distillation duration, nitrogen flow rates, stirring speeds, and titration endpoint criteria. Real-time operational logs—including start/stop timestamps, actual vs. setpoint temperatures, nitrogen pressure readings, and titrant volume consumed—are recorded automatically and exportable via USB port in CSV format. No proprietary software installation is required; raw data files are human-readable and compatible with common spreadsheet and statistical analysis tools. For regulated environments, the system supports manual documentation of analyst ID, batch number, and sample ID prior to run initiation—enabling traceability aligned with basic GLP documentation practices.

Applications

• Pharmaceutical quality control laboratories conducting routine SO₂ screening of crude drugs and decoction pieces per Chinese Pharmacopoeia requirements
• Federal and provincial drug regulatory agencies performing compliance verification and market surveillance testing
• Agricultural product inspection centers assessing sulfite residues in fresh produce, dried fruits, and edible fungi
• Research institutions studying SO₂ migration, degradation kinetics, or processing-related retention in herbal formulations
• Contract testing laboratories serving nutraceutical and traditional medicine manufacturers requiring auditable, reproducible residue data

FAQ

Does the CH-6000C comply with USP or European Pharmacopoeia methods for sulfur dioxide determination?
No — it is specifically engineered to meet Chinese Pharmacopoeia 2010 Edition (Second Supplement) and relevant Chinese agricultural standards (NY/T series). Adaptation to USP <231> or Ph. Eur. 2.2.59 requires method validation and potential hardware modification.
Can the system be used for total sulfite analysis in wine or beverages?
Not without significant revalidation. Its current configuration targets solid matrices; liquid samples require custom digestion protocols and risk foaming or carryover issues.
Is remote monitoring or Ethernet connectivity supported?
No — the system operates as a standalone benchtop instrument with local USB data export only. Networked operation is not implemented in firmware.
What maintenance intervals are recommended for the far-infrared heating modules?
Annual visual inspection and calibration verification are advised; typical service life exceeds 5,000 operating hours under normal load conditions.
Are replacement parts such as condenser tubes or separatory funnels available as consumables?
Yes — all glassware components conform to standard taper joints (e.g., 24/40, 19/22) and are commercially available from major laboratory suppliers; HUANKONG also offers OEM-specified spares.