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Micro Volume Spectrophotometer (Nano)

Introduction

A Micro Volume Spectrophotometer (Nano) enables highly accurate UV-Vis measurements from ultra-small samples (≈0.5–2 µL) without cuvettes. It preserves precious DNA, RNA, and protein materials while speeding up quantification and purity checks in modern life-science workflows.


What Is a Micro Volume Spectrophotometer?

A microvolume (nano) spectrophotometer is a compact UV-Vis instrument that measures absorbance directly from a small drop placed on an optical pedestal. Light traverses a controlled micro-pathlength, absorbance is captured across ~190–850 nm, and concentration is computed via Beer–Lambert Law—ideal for nucleic acid and protein quantification without cuvettes.


Devices in This Category

  • Pedestal microvolume UV-Vis spectrophotometer (single-sample)
  • Microvolume spectrophotometer with touchscreen & onboard software
  • Nano spectrophotometer with optional cuvette port/long-path adapter
  • Multi-sample microvolume system with automated wiping/positioning
  • Microvolume accessories: calibration standards, hydrophobic tips, cleaning tools

Technical Features and Specifications

Feature Details
Sample Volume 0.5–2.0 µL (typical)
Wavelength Range UV-Vis 190–850 nm (supports 260 nm for nucleic acids, 280 nm for proteins)
Detection Limits dsDNA to ~2 ng/µL; protein sensitivity assay-dependent
Measurement Time <10 seconds per sample (typical)
Pathlength Control Fixed or auto-ranging micro-pathlength for extended dynamic range
Purity Metrics A260/A280, A260/A230 ratios with pass/fail thresholds
Calibration & QA Quick blanking; minimal calibration; supports verification standards
Data & Connectivity USB/export to CSV; cloud/LIMS sync; built-in touchscreen UI (model-dependent)

Benefits

  • Ultra-low sample consumption with cuvette-free workflow.
  • Fast, accurate quantification and purity assessment in seconds.
  • Reduced contamination risk and consumable costs.
  • Compact, portable footprint for any biotech or academic lab bench.
  • User-friendly operation with reproducible results across users.

Applications and Tests

🔬 Molecular Biology

  • DNA/RNA quantification for PCR, cloning, and NGS library prep
  • Purity checks (A260/A280, A260/A230) to detect carryover contaminants
  • Enzyme kinetics and small-volume absorbance assays

🧪 Clinical Diagnostics

  • Protein concentration (Bradford, BCA) in micro-scale workflows
  • QC checks for nucleic-acid extraction kits and workflows
  • Method verification and small-volume reference testing

🏭 Industrial & Food Testing

  • Fast protein/nucleic-acid checks in process development
  • Formulation verification with minimal sample use
  • Small-volume spectral scans for additives or enzymes

🌱 Environmental & Agricultural Labs

  • Nucleic-acid assessment in field-limited or rare specimens
  • Protein/biomolecule measurements in micro-extractions
  • Rapid purity screening prior to downstream analyses

Micro Volume Spectrophotometer vs. Traditional UV-Vis

Aspect Micro Volume Spectrophotometer (Nano) Traditional UV-Vis Spectrophotometer
Sample Volume 0.5–2.0 µL 500–3000 µL (cuvette)
Cuvettes Needed No (pedestal measurement) Yes
Throughput Speed High (seconds/sample) Moderate
Sample Preservation Excellent Moderate
Suitability for DNA/RNA Excellent Good; best with larger volumes
Cost & Consumables Higher upfront; minimal consumables Lower upfront; ongoing cuvette costs

Expert Tips for Choosing the Right Micro Volume Spectrophotometer

  • Match detection limits and dynamic range to your lowest dsDNA/RNA concentrations.
  • Prioritize auto-pathlength and robust purity ratio calculations for consistency.
  • Check software features for LIMS/export, user management, and audit trails.
  • Evaluate measurement speed, reproducibility, and cleaning ergonomics.
  • Confirm warranty, local support, and availability of verification standards.

Maintenance Best Practices

  • Clean the optical surfaces before/after each run with lint-free wipes and 70% ethanol.
  • Use the correct blanking solution and verify zero baseline routinely.
  • Prevent bubbles and particulate matter; spin down samples when needed.
  • Store the device dust-free; keep the arm closed when idle to protect optics.
  • Update firmware periodically and document performance checks.

FAQ

Q: What is the typical wavelength range for a Micro Volume Spectrophotometer?
A: Most nano spectrophotometers scan ~190–850 nm, covering nucleic acids at 260 nm and proteins at 280 nm.

Q: How little sample do I need?
A: Typically 0.5–2.0 µL per measurement, making it ideal for scarce or precious samples.

Q: Do I still need cuvettes?
A: No, measurements are performed directly on a pedestal; some models offer optional cuvette ports for longer pathlengths or kinetics.

Q: Can it assess sample purity?
A: Yes, common purity ratios (A260/A280, A260/A230) are calculated automatically with pass/fail guidance.

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