Ruixin SPb-JCd2 Portable Cadmium (Cd) Rapid Detection Analyzer
| Brand | Ruixin |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Manufacture | China |
| Model | SPb-JCd2 |
| Price Range | USD 4,200 – 7,000 |
| Functionality | Single-Analyte Detection (Cadmium Only) |
| Sample Format | Single-Sample Dedicated System |
| Optical Wavelength | 540 nm |
| Detection Time | ≤ 3 min |
| Photometric Repeatability | ≤ 0.2% |
| Detection Channels | 1 |
Overview
The Ruixin SPb-JCd2 Portable Cadmium (Cd) Rapid Detection Analyzer is a dedicated spectrophotometric instrument engineered for quantitative determination of cadmium ions in food matrices using colorimetric reaction principles. It operates on the basis of dithizone-based complexation chemistry, where cadmium forms a stable, colored chelate under controlled pH and ionic conditions; absorbance at 540 nm is linearly proportional to cadmium concentration within the validated range. Designed for field-deployable operation, the SPb-JCd2 integrates optical path self-calibration, embedded thermal printing, and multi-power flexibility—enabling reliable, GLP-aligned measurements in mobile labs, regulatory inspection vehicles, or fixed-site quality control environments. Its architecture complies with fundamental requirements for rapid screening instruments referenced in ISO 11843-2 (capability of detection), AOAC Official Method 2013.02 (for Cd in cereals and vegetables), and China’s GB 5009.15-2014 standard for cadmium determination in food.
Key Features
- Integrated optical self-calibration system eliminates manual zero/100% transmittance adjustment—ensures consistent photometric baseline upon power-on.
- 4.3-inch high-resolution color TFT touchscreen with full Chinese GUI, supporting stylus and predictive Chinese input for sample labeling and operator annotation.
- Dual photometric display modes: absorbance (0.000–4.000, resolution 0.001) and transmittance (0.00–100.00%, resolution 0.01%), facilitating method validation and cross-platform data correlation.
- Built-in thermal printer generates traceable hard-copy reports containing analyte concentration (mg/kg), Chinese-labeled sample ID, test date/time, operator name, and institutional affiliation.
- Triple power supply compatibility: rechargeable Li-ion battery (≥6 h continuous operation), AC 220 V adapter, and DC 5 V USB input—optimized for unpowered field sites and vehicle-mounted deployment.
- Real-time data transmission via RS232 serial interface and USB host port; supports integration into centralized food safety monitoring networks with audit-trail-capable data logging.
Sample Compatibility & Compliance
The SPb-JCd2 is validated for use with homogenized solid food samples (e.g., rice, wheat flour, leafy vegetables, seafood) and liquid extracts prepared according to standardized pretreatment protocols—including acid digestion (HNO₃/H₂O₂), centrifugation, and filtration (0.45 µm). It meets the minimum performance criteria for rapid screening tools outlined in EU Commission Regulation (EU) No 2023/915 (setting maximum levels for Cd in foodstuffs) and aligns with preliminary screening thresholds defined in US FDA’s Red Book (Chapter 11: Metals). While not a confirmatory technique per ICP-MS or GF-AAS, its LOD of 0.5 mg/kg and linear dynamic range of 0–15 mg/kg satisfy routine surveillance needs for commodities exceeding EU MRLs (e.g., 0.2 mg/kg in rice, 0.05 mg/kg in infant formula). Instrument stability is verified at ≤0.3% drift over 3 minutes, ensuring robustness during sequential batch analysis.
Software & Data Management
The analyzer embeds firmware with local storage for ≥1,000 test records, each timestamped and tagged with operator ID, sample ID, and calibration status. Data export is supported in CSV format via USB mass storage mode. For networked deployment, optional middleware enables secure HTTPS-based upload to cloud-hosted LIMS platforms compliant with 21 CFR Part 11 requirements—including electronic signatures, audit trails, and role-based access control. All measurement metadata—including raw absorbance values, wavelength verification logs, and thermal printer output timestamps—are retained and exportable to support internal QA reviews and external regulatory audits.
Applications
- Routine cadmium screening in grain receiving stations and milling facilities prior to processing.
- On-site verification by municipal food safety enforcement teams during market inspections and border controls.
- Pre-shipment testing in export-oriented aquaculture and agricultural cooperatives targeting EU or ASEAN markets.
- Supplemental rapid triage in certified laboratories when ICP-MS capacity is constrained—prioritizing samples for confirmatory analysis.
- Training and proficiency testing in food science education programs requiring hands-on exposure to regulated heavy metal assay workflows.
FAQ
What is the detection principle used by the SPb-JCd2?
It employs dithizone-mediated colorimetry at 540 nm, following sample digestion and pH-adjusted chelation—quantified via Beer-Lambert law correlation.
Does the instrument require external calibration standards before each test?
No—optical path self-calibration occurs automatically at startup; only periodic verification with certified reference materials (e.g., CRM 8435) is recommended per ISO/IEC 17025 internal quality control schedules.
Can the SPb-JCd2 be used for other heavy metals?
No—it is hardware- and reagent-optimized exclusively for cadmium; no cross-reactivity validation exists for Pb, As, Hg, or Cr(VI).
Is the thermal printer compatible with third-party label formats?
The embedded printer outputs fixed-format reports; custom templates require firmware-level modification—not supported under standard warranty.
How is data integrity ensured during wireless transmission?
RS232 and USB connections are point-to-point and non-networked; cloud uploads rely on TLS 1.2 encryption and session-authenticated API keys managed through the central monitoring platform.
