Ruixin SPb-SL2 Potassium Sorbate Analyzer
| Brand | Ruixin |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | SPb-SL2 |
| Price | USD 780 (FOB Shanghai) |
| Functionality | Single-Analyte Dedicated Analyzer |
| Sample Format | Single-sample discrete mode |
| Optical Wavelength | 540 nm |
| Assay Time | ≤ 180 s |
| Photometric Repeatability | ≤ 0.2% (at 540 nm) |
| Detection Channels | 1 |
Overview
The Ruixin SPb-SL2 Potassium Sorbate Analyzer is a compact, field-deployable photometric analyzer engineered for rapid, quantitative determination of potassium sorbate in food matrices using standardized colorimetric methodology at 540 nm. It operates on the principle of absorbance measurement in accordance with Beer–Lambert law, where potassium sorbate—after derivatization via acid-catalyzed reaction with thiobarbituric acid or analogous chromogenic reagent—forms a stable colored complex proportional to analyte concentration. Designed for compliance-driven environments, the instrument delivers trace-level quantification (LOD: 0.01 g/kg; linear range: 0.00–2.00 g/kg) with high photometric stability (drift ≤ 0.3% over 3 min) and meets core performance benchmarks required for routine screening in food safety laboratories and mobile inspection units.
Key Features
- Integrated rechargeable lithium-ion battery enabling ≥8 hours of continuous operation in field conditions—ideal for use in food inspection vehicles, farmers’ markets, or remote distribution centers.
- 4.3-inch high-resolution TFT color touchscreen with full Chinese GUI; supports stylus- and keyboard-based Chinese character input for unambiguous sample annotation and operator identification.
- Onboard thermal printer producing compliant hard-copy reports containing: analyte concentration (g/kg), Chinese sample name, test date/time (ISO 8601 format), analyst ID, laboratory/unit name, and instrument serial number.
- Self-calibrating optical path system: automatic zero and reference (100% T) alignment upon power-on—eliminates manual calibration steps and reduces operator dependency.
- Dual-mode photometric display: simultaneous real-time readout of absorbance (A: 0.000–4.000, resolution 0.001) and transmittance (%T: 0.00–100.00%, resolution 0.01%), supporting method development and cross-validation with legacy spectrophotometric protocols.
- Embedded data management: automatic timestamped storage of ≥1,000 test records with recall-by-date, sample ID, or operator; no external memory card required.
Sample Compatibility & Compliance
The SPb-SL2 is validated for use with homogenized liquid or extractable solid food samples—including beverages, jams, sauces, dairy products, and processed meats—following standardized pre-treatment per GB 5009.28-2016 (China National Food Safety Standard for Determination of Sorbic Acid and Potassium Sorbate). While not certified to ISO/IEC 17025, its photometric performance aligns with critical parameters referenced in AOAC Official Method 2005.04 and EU Commission Regulation (EC) No 1881/2006 for sorbate limits. The device supports GLP-aligned workflows through mandatory audit-trail elements: immutable timestamps, operator log-in tracking, and non-editable report generation. All firmware and calibration routines are traceable to NIM (National Institute of Metrology, China)–verified reference standards.
Software & Data Management
Data export and remote monitoring are enabled via dual physical interfaces: RS-232 (for legacy lab network integration) and USB 2.0 (for direct PC connection and mass data transfer). The instrument outputs CSV-formatted datasets compatible with LIMS platforms (e.g., LabWare, STARLIMS) and Excel-based QA/QC dashboards. Optional cloud synchronization (via third-party middleware) permits real-time upload to centralized food safety surveillance networks—supporting jurisdictional compliance reporting to municipal SAMR (State Administration for Market Regulation) portals. Firmware updates are delivered via signed USB packages to ensure integrity and version control.
Applications
- Routine surveillance testing by municipal market supervision bureaus during food circulation inspections.
- On-site verification at cold-chain logistics hubs prior to warehouse entry or retail distribution.
- Internal QC screening in medium-scale food processing facilities lacking full HPLC infrastructure.
- Training and capacity-building in regional food safety laboratories under national “Safe Food China” initiatives.
- Complementary use alongside multi-analyte platforms (e.g., pesticide residue or nitrite testers) within modular food safety detection kits.
FAQ
What regulatory standards does the SPb-SL2 comply with for potassium sorbate testing?
It adheres to GB 5009.28-2016 methodology and delivers performance metrics consistent with AOAC 2005.04 acceptance criteria for repeatability and linearity.
Can the instrument be used without AC power in field settings?
Yes—its internal Li-ion battery supports uninterrupted operation for up to 8 hours; DC 5 V external power input is also supported for vehicle-mounted use.
Is method validation documentation available for GMP or audit purposes?
Instrument-specific validation reports (including photometric accuracy, carryover assessment, and LOD/LOQ verification per ICH Q2(R2)) are provided upon request to qualified purchasers.
Does the device support multi-language firmware beyond Chinese?
Firmware is currently localized for Simplified Chinese only; English-language UI is not available in standard configuration.
How is data integrity ensured during transmission to external systems?
All RS-232 and USB exports include CRC-16 checksums; no encryption is applied, but raw CSV files retain full traceability of source instrument ID and acquisition timestamp.
