722 Grating Spectrophotometer

The 722 grating spectrophotometer is a high-precision visible spectrophotometer with a 1200 lines/mm diffraction grating, wide wavelength range, and versatile sample handling for laboratory analysis.

Key Specifications and Features

• Wavelength Range: 325–1000 nm, covering the visible spectrum and near-UV, suitable for chlorophyll, heavy metals, and biochemical assays .
• Grating and Monochromator: High-performance 1200 lines/mm diffraction grating with CT-type or holographic blazed monochromator ensures high wavelength accuracy, low stray light (≤0.1% T), and good monochromaticity .
• Optical Resolution: 4–5 nm bandwidth, allowing precise distinction of absorption peaks for quantitative analysis .
• Detector: High-quality silicon photometric diode for accurate and reproducible measurements .
• Sample Compartment: Large chamber accommodating 5–100 mm path length cuvettes, including 100 mm holders for larger samples like plant leaves .
• Measurement Modes: Transmittance (T), Absorbance (A), Concentration (C), and optional functions like Factor setting and direct concentration readout .
• Stability and Accuracy: Instrument stability ±0.001 A/H, transmittance precision ≤0.5% T, ensuring reliable long-term measurements .
• User Interface: Backlit LCD or touch screen (depending on model), easy switching between modes, USB interface, and memory for storing concentration curves .
• Light Source: Tungsten-halogen or halogen/deuterium lamps, user-replaceable for extended instrument life .
• Software and Connectivity: Compatible with software like UVWin7, printer interface available for data output .

Applications

• Environmental Analysis: Detection of heavy metals in water and other samples, leveraging the full visible spectrum and low stray light for accurate concentration determination .
• Biochemistry and Plant Studies: Chlorophyll content measurement, enzyme assays, and other biochemical analyses requiring precise absorbance readings .
• Pharmaceutical and Clinical Labs: Quantitative and qualitative analysis of drugs, clinical samples, and quality control in manufacturing .
• General Laboratory Use: Widely used in physical, chemical, and environmental labs for routine spectrophotometric measurements .

Practical Considerations

• Installation: Place on a firm, level bench in a dry room (5–35°C, ≤85% humidity), away from vibrations, direct sunlight, and strong electromagnetic fields .
• Power Supply: AC 220V ±22V, 50Hz ±1Hz, with recommended voltage stabilizer for consistent performance .
• Maintenance: Easy lamp replacement and calibration, with automatic light gate technology to protect the photoelectric sensor . The 722 grating spectrophotometer is a versatile, high-precision instrument suitable for a wide range of laboratory applications, offering reliable performance, flexible sample handling, and accurate spectral measurements.