(VNE057) 7mL Fluorescence Cuvette with PTFE Lid, Fused, Lightpath 20mm, 4 Clear Walls

Description

VNE057 – 7 mL Quartz Long Path Length Fluorescence Cuvette (20 mm Lightpath, 4 Windows, PTFE Lid, Fused Fabrication)

The VNE057 is a precision quartz cuvette designed for fluorescence and absorbance spectroscopy that requires enhanced sensitivity with moderate sample volume. With a 20 mm optical path length and 4 optically clear windows, this cuvette is ideal for right-angle fluorescence detection, front-face fluorescence, and high-sensitivity absorbance measurements.

Manufactured using fused fabrication, this cuvette offers excellent optical clarity and broad UV/VIS transmission (190 – 2500 nm) at an economical cost. Compared to molded cuvettes, fused fabrication provides good performance but has slightly lower chemical durability at the bonded seams. It is well suited for general laboratory use, particularly when working with aqueous, acidic, or mild organic solutions.

The PTFE lid provides good resistance to most acids and bases and helps minimize evaporation, making the cuvette suitable for sensitive measurements in both research and routine analytical applications.

Chemical Compatibility

Fused quartz cuvettes are resistant to most corrosive chemicals and many organic solvents. However, the fused seams are more vulnerable than molded cuvettes. For best performance and long service life:

• ✔ Safe for most acids (except HF), bases, water-based solutions, alcohols (e.g., ethanol, isopropanol) and buffer solutions.
• ⚠ Not recommended for prolonged or high-concentration exposure to aggressive organic solvents such as toluene, acetone, MEK, carbon tetrachloride, chloroform, or similar chemicals.
• ❌ Do not use with hydrofluoric acid (HF) — it reacts with quartz.
• Rinse and clean immediately after exposure to solvents to prevent staining or seam degradation.

Key Features

• 20 mm optical path length: increases signal strength and sensitivity for low-concentration measurements.
• 4 optical windows: ideal for right-angle fluorescence and absorbance applications.
• Fused fabrication: excellent UV/VIS performance at lower cost, suitable for routine laboratory use.
• PTFE lid: provides chemical resistance and minimizes sample evaporation.
• 7 mL volume: efficient balance between sensitivity and sample consumption.

Typical Applications

• Fluorescence spectroscopy (right-angle & front-face)
• High-sensitivity absorbance measurements
• Environmental water and solution analysis
• Routine analytical and teaching laboratories

Cuvette Specifications

Notes on Use

• Fused cuvettes are economical but have a shorter service life under harsh organic solvents compared to molded cuvettes.
• Clean immediately after use to avoid staining or seam damage.
• For frequent use with strong solvents, consider molded cuvettes for longer lifespan and better solvent resistance.

Comparison of Fabrication Types

1
QVARZ Cuvettes Transmission Characteristics The following table is our cuvettes and cells made of quartz material suitable for wavelength from 190nm to 2500nm and depicts the percentage transmission for the material. IR or Glass material is not included.
Why QVARZ Cuvettes and Cells? QVARZ is world-renowned as the producer of premium quartz cuvettes. Over fifteen years of experience manufacturing quartz cuvettes ensures that every QVARZ cuvettes are manufactured to the most exacting standards for reproducible results.
Spectrophotometry cuvettes - Most spectrophotometry applications in the visible and UV ranges benefit from QVARZ spectrophotometry cuvettes. Our cuvettes made of fused quartz material deliver precise and reliable readings even at wavelengths as low as 190 nm. QVARZ cuvettes are compatible with most spectrophotometers and photometers with standard 0.2 - 100 mm path lengths. Fluorometry cuvettes - QVARZ brings two decades of experience molding high-quality spectrophotometry cuvettes to new four-sided clear cuvettes for fluorometry. Available in standard quartz material with ultra-low auto-fluorescence for the highest precision measurements. Protective packaging - QVARZ cuvettes are encased in dust-free, low scratching expanded polystyrene packaging. This ensures that premium cuvettes arrive in the laboratory ina the same pristine condition they were in at the factory, with optical quality windows and free of contaminants.  Volumes for most purposes - Our cuvettes are available in a variety of ranges from macro to macro semi-micro sizes to respond to the needs of most scientific applications. We are also able to customize sample volume to deliver consistent, accurate findings. Perform consistently - QVARZ Cuvettes are constructed from high-quality fused quartz materials and are grouped by manufacturing mold cavities to ensure the lowest fluctuation in extinction coefficient. Customization - Custom cuvettes and cells are encouraged and available upon request; mechanical drawings with specifications and tolerances are prerequisites. Awesome pricing and flexibility on small quantities.
To the best of our knowledge, the technical information provided here is accurate. However, Qvarz.com assumes no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.