Shenchanghong CHAL-130 Aluminum Photometric Analyzer

Overview

The Shenchanghong CHAL-130 Aluminum Photometric Analyzer is a dedicated benchtop instrument engineered for the quantitative determination of dissolved aluminum (Al³⁺) in environmental water samples—including surface water, groundwater, drinking water, wastewater effluents, and industrial process streams. It operates on the well-established photometric (colorimetric) principle: aluminum ions react with a specific chromogenic reagent under controlled pH conditions to form a stable colored complex. The intensity of absorbance at a defined wavelength—typically within the visible range (e.g., 510–550 nm)—is measured using a high-stability optical system and correlated to concentration via Beer–Lambert law calibration. Designed for routine compliance monitoring and laboratory QA/QC workflows, the CHAL-130 delivers trace-level sensitivity (detection limit aligned with 0.01 mg/L resolution), robust baseline stability (<0.002 A drift over 20 min), and metrological consistency validated against standard reference materials.

Key Features

• High-performance imported light source combined with narrow-band interference filters ensures exceptional photometric stability and long-term repeatability.
• Integrated 16-bit low-power microcontroller architecture enables precise signal acquisition, real-time calculation, and efficient power management—ideal for continuous lab operation.
• Large backlit LCD display with full Chinese menu interface simplifies method selection, calibration, measurement, and data review—no external PC required for basic operation.
• Dual-curve capability: pre-programmed factory calibration curve plus user-definable custom calibration curves, supporting method validation per ISO/IEC 17025 or EPA guidance.
• Chemically resistant ABS housing provides mechanical durability and corrosion resistance against common reagents (e.g., nitric acid, ammonium acetate buffers) used in aluminum digestion and color development protocols.
• Compact footprint (266 × 200 × 130 mm) and sub-1 kg mass facilitate integration into constrained lab spaces or mobile environmental testing units.

Sample Compatibility & Compliance

The CHAL-130 is optimized for clear, low-turbidity aqueous matrices. For samples containing suspended solids, organic interferences, or competing cations (e.g., Fe³⁺, Cu²⁺), recommended pretreatment includes filtration (0.45 µm membrane), acid digestion (if particulate-bound Al is targeted), and masking agents per standard methods such as HJ 589–2010 (Chinese EPA) or APHA 3113 B (aluminum by aluminon). While not certified to ISO 9001 or CE for export markets without additional documentation, its performance parameters align with key requirements of ISO 7027 (water quality — determination of turbidity) and ASTM D3559 (standard test methods for lead, cadmium, chromium, copper, nickel, zinc, and aluminum in water). Instrument design supports GLP-aligned recordkeeping when paired with external LIMS or spreadsheet-based audit trails.

Software & Data Management

Data storage is handled internally: measurement results—including sample ID, date/time stamp, absorbance value, concentration, and calibration status—are retained in non-volatile memory for extended periods. Export functionality is limited to manual transcription or optional RS-232 serial output (hardware-dependent); no proprietary software suite is bundled. Users may integrate CHAL-130 output into validated laboratory information management systems (LIMS) or electronic lab notebooks (ELN) via ASCII-formatted serial logs. Though not natively compliant with FDA 21 CFR Part 11, the device supports ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate) when operated under documented SOPs with handwritten or digitally signed logbooks.

Applications

• Regulatory monitoring of aluminum in municipal drinking water supplies per WHO guideline values (0.2 mg/L) and national standards (e.g., GB 5749–2022).
• Effluent compliance testing for aluminum sulfate (alum) coagulant carryover in wastewater treatment plants.
• Environmental impact assessments near bauxite processing facilities or acidic mine drainage sites.
• Quality control of boiler feedwater and cooling tower circuits where aluminum scaling poses operational risk.
• Educational use in university environmental chemistry labs for teaching spectrophotometric analysis fundamentals and method validation protocols.

FAQ

What sample preparation is required prior to analysis?
Filtered (0.45 µm) samples are recommended. For total aluminum quantification, hot nitric acid digestion per EPA Method 200.7 or HJ 487–2009 is advised.
Can the CHAL-130 measure other metals besides aluminum?
No—it is a single-analyte photometer optimized exclusively for aluminum using the aluminon or Eriochrome Cyanine R method; no multi-element capability is provided.
Is calibration verification traceable to NIST standards?
The instrument accepts NIST-traceable aluminum standard solutions (e.g., 1000 mg/L Al in 2% HNO₃); users must perform and document calibration verification per internal QA procedures.
What maintenance intervals are recommended?
Optical path cleaning every 3 months; annual verification of wavelength accuracy and photometric linearity using neutral density filters or certified reference standards.
Does the analyzer support automatic dilution or auto-sampling?
No—sample introduction and reagent addition are fully manual; it is intended for discrete, operator-guided analysis rather than unattended batch processing.