Elite DAD3100 Diode Array Detector
| Brand | Elite |
|---|---|
| Origin | Liaoning, China |
| Manufacturer Type | Manufacturer |
| Product Category | Domestic |
| Model | DAD3100 |
| Instrument Type | Diode Array Detector (DAD) |
| Wavelength Range | 190–800 nm |
| Detection Method | Diode Array |
| Light Source | Tungsten-Halogen & Deuterium Lamps |
| Baseline Noise | ≤ ±1.0 × 10⁻⁵ AU |
| Baseline Drift | ≤ 2.0 × 10⁻⁴ AU/h |
| Dimensions | 500 × 300 × 175 mm (L×W×H) |
| Weight | 18 kg |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Power Consumption | 80 W |
Overview
The Elite DAD3100 Diode Array Detector is a high-performance, benchtop UV-Vis spectral detection system engineered for integration with high-performance liquid chromatography (HPLC) platforms. It operates on the principle of simultaneous multi-wavelength absorbance detection using a fixed grating spectrometer and a 1024-element silicon photodiode array. Unlike single-wavelength UV detectors, the DAD3100 captures full-spectrum data (190–800 nm) at each chromatographic data point—enabling true three-dimensional (3D) chromatogram generation (retention time × wavelength × absorbance). This architecture supports real-time spectral acquisition during gradient elution, facilitating post-run spectral interrogation, peak identification, and co-elution assessment without re-injection.
Key Features
- Optimized optical path design with imported fused-silica collimating optics and high-efficiency holographic grating, delivering high photon throughput and spectral resolution (~1.2 nm nominal bandwidth)
- Dual-lamp light source configuration: deuterium lamp (190–370 nm) and tungsten-halogen lamp (350–800 nm), ensuring seamless spectral coverage across the UV-Vis range
- Robust mechanical construction using precision sheet-metal chassis with electromagnetic interference (EMI)-shielded internal layout and thermally stable heat-dissipation architecture
- Real-time spectral acquisition at user-selectable scan rates up to 100 Hz, with adjustable spectral window (e.g., 190–400 nm or 200–800 nm) and resolution mode
- Integrated hardware-level zero-drift compensation and temperature-stabilized detector housing to maintain baseline stability under extended operation
Sample Compatibility & Compliance
The DAD3100 is compatible with standard HPLC flow cells (10 mm path length, 1 µL volume) and supports both analytical- and semi-preparative-scale separations. Its optical design accommodates common mobile phase solvents including water, acetonitrile, methanol, and buffered aqueous systems (pH 2–8). The detector meets essential performance criteria aligned with ASTM E260 and ISO 17025 requirements for spectral fidelity and quantitative repeatability. When operated within the ChromSoft chromatography data system (CDS), it supports audit trail logging, electronic signatures, and 21 CFR Part 11-compliant user access control—making it suitable for GLP and GMP-regulated environments where data integrity and traceability are mandatory.
Software & Data Management
The DAD3100 is natively controlled via Elite’s ChromSoft CDS, a Windows-based platform certified for regulated laboratory use. ChromSoft provides comprehensive spectral processing capabilities including library matching (NIST-compatible spectral databases), peak purity analysis (using orthogonal spectral correlation algorithms), multi-wavelength chromatogram overlay, and spectral deconvolution for suspected co-elutions. All raw spectral data (absorbance vs. wavelength at each retention time) are stored in vendor-neutral .cdf format compliant with AIA/ANDI standards. Audit trails record all parameter changes, integration events, and report generation actions with timestamps and operator IDs—ensuring full compliance with FDA and EMA data governance expectations.
Applications
- Pharmaceutical impurity profiling and forced degradation studies requiring spectral confirmation of unknown peaks
- Natural product analysis where compound classes (e.g., flavonoids, alkaloids) exhibit characteristic UV-Vis signatures
- Quality control of herbal extracts, food colorants, and cosmetic actives via spectral fingerprinting
- Method development support through wavelength optimization and selectivity assessment across the UV-Vis range
- Stability-indicating assay validation per ICH Q2(R2), leveraging spectral consistency as a critical quality attribute
FAQ
What is the minimum dwell volume of the DAD3100 flow cell?
The standard flow cell has a 1 µL internal volume and 10 mm optical path length—optimized for analytical HPLC applications with flow rates from 0.2 to 3.0 mL/min.
Does the DAD3100 support spectral library creation and custom matching?
Yes—ChromSoft allows users to build proprietary reference libraries from pure standards and perform similarity search (correlation coefficient >0.995 threshold) against unknown peaks.
Is the detector compatible with UHPLC systems operating above 600 bar?
While the DAD3100 is designed for conventional HPLC pressure ranges (<400 bar), it may be integrated into UHPLC workflows using appropriate low-volume, high-pressure-compatible flow cells (sold separately).
How is baseline stability verified during qualification?
Baseline noise and drift are measured per USP <621> guidelines using a mobile phase blank (e.g., 90% water / 10% methanol) over 60 minutes; results must meet ≤±1.0×10⁻⁵ AU noise and ≤2.0×10⁻⁴ AU/h drift specifications.
Can spectral data be exported for third-party chemometric analysis?
Yes—full 3D spectral datasets export as ASCII text or CSV files containing retention time, wavelength, and absorbance matrices, enabling PCA, MCR, or PLS regression in MATLAB, Python (SciPy), or Unscrambler.
