Shanghai YDWG Polarimeter Sample Cells

Overview

Shanghai YDWG polarimeter sample cells are precision-engineered optical components designed for use with benchtop and automated polarimeters in pharmaceutical, fine chemical, food, and academic research laboratories. These cells operate on the fundamental principle of optical rotation measurement—quantifying the angular deviation of plane-polarized light as it passes through optically active chiral substances (e.g., sugars, amino acids, antibiotics). Each cell is manufactured to strict dimensional tolerances and surface flatness specifications (λ/4 @ 633 nm) to minimize beam distortion and ensure high reproducibility in specific rotation [α] determinations per ASTM E1252 and USP . The modular design supports both static and dynamic temperature-controlled measurements, enabling compliance with pharmacopeial methods requiring controlled thermal environments (e.g., USP at 20 °C or 25 °C).

Key Features

• Multiple pathlength options (50 mm, 100 mm, 200 mm) to accommodate concentration–sensitivity trade-offs per Beer–Lambert constraints in polarimetric analysis
• Standard internal diameter of Ø9 mm for routine applications; Ø5 mm variant for micro-volume analysis (as low as 0.8 mL)
• Temperature-regulated variants include jacketed glass cells (SGW®-200g), stainless-steel thermostatic cells (SGW®-100k/200k), and corrosion-resistant Hastelloy C-276 cells (SGW®-100KF2/200KF2) rated for aggressive solvents (e.g., concentrated HCl, HF-containing media)
• Optical-grade borosilicate glass (Duran®-equivalent) with AR-coated end windows (optional) to reduce Fresnel reflection losses below 0.2% per surface
• Quartz reference cells (SGW®-101b, SGW®-102b) certified for angular accuracy ±0.002° over ranges from ±1° to ±84°, traceable to NIM calibration standards
• Mechanically keyed mounting interfaces to prevent rotational misalignment during insertion into polarimeter sample chambers

Sample Compatibility & Compliance

All cells are compatible with YDWG’s SGW series polarimeters (e.g., SGW-1, SGW-2, SGW-50/100/200 models) and functionally interoperable with major third-party platforms including PerkinElmer 341, Anton Paar MCP series, and Rudolph Autopol instruments. Glass cells meet ISO 8573-1 purity class 3 for particulate contamination and pass hydrolytic resistance Class HGB per ISO 719. Stainless-steel and Hastelloy variants conform to ASME BPE-2022 surface finish requirements (Ra ≤ 0.4 µm) and are suitable for GMP manufacturing environments. Full traceability documentation—including material certificates (EN 10204 3.1), dimensional inspection reports, and thermal expansion coefficient data—is provided upon request.

Software & Data Management

While the cells themselves are passive optical components, their use is fully integrated into YDWG’s PolarSoft™ v4.x software ecosystem. This platform supports automated cell identification via QR-coded labels, batch-specific temperature ramp logging (for thermostatic cells), and audit-trail-enabled data capture compliant with FDA 21 CFR Part 11 requirements. Raw rotation angle data exported in .CSV or .XML formats includes embedded metadata: cell ID, pathlength, calibration date, operator ID, and ambient temperature/humidity readings from integrated environmental sensors. All calibration certificates issued by YDWG’s CNAS-accredited metrology lab (No. CNAS L9231) include uncertainty budgets calculated per GUM (JCGM 100:2008).

Applications

• Pharmaceutical QC: Enantiomeric excess (ee%) determination of chiral APIs per ICH Q5C guidelines
• Sugar industry: Brix and sucrose concentration quantification in cane/beet processing per ICUMSA Method GS7-12
• Academic research: Kinetic monitoring of asymmetric synthesis reactions using real-time polarimetric flow cells
• Food safety: Detection of adulteration in honey and maple syrup via optical rotation fingerprinting
• Biotechnology: Monitoring enzymatic resolution of racemates in immobilized enzyme reactors

FAQ

Are these cells compatible with non-YDWG polarimeters?
Yes—mechanical and optical interface dimensions adhere to DIN 1313-1 and ISO 13694 conventions; adapters available for PerkinElmer, Rudolph, and Anton Paar mounts.
What is the maximum operating temperature for the stainless-steel thermostatic cells?
SGW®-100k/200k cells support continuous operation up to 120 °C with external recirculating chillers/heaters (±0.1 °C stability).
Can custom pathlengths or diameters be manufactured?
Yes—YDWG offers OEM cell fabrication under NDA, including elliptical cross-sections, fused-silica variants, and vacuum-tight configurations for gas-phase measurements.
Is NIST traceability available for quartz reference cells?
NIST-traceable calibration is available as an add-on service (certified by A2LA-accredited labs); standard certificates are traceable to NIM (China National Metrology Institute).
Do you provide IQ/OQ documentation for regulated facilities?
Full 3Q validation packages—including instrument-specific test protocols, raw data worksheets, and summary reports aligned with ASTM E2500—are available upon order confirmation.