Cuvettes and Cells available for Customization

Description: Standard rectangular cuvettes are the most common spectroscopic cells. They have a four-sided rectangular (often square) cross-section and typically a 10 mm optical path length, adhering to international size standards for spectrophotometers. Two sides are clear optical windows (or four clear sides for fluorescence versions), and they hold about 3.5 mL in the standard 10 mm path format.

Key Features:

• Standard Path Length & Dimensions: Usually 10 mm path length (with available variants from ~1 mm up to 100 mm path). Outer dimensions (~12.5 × 12.5 mm square) meet industry standards to fit most instruments.

• High Optical Quality: Made of UV-VIS-IR transparent quartz or optical glass, with two polished windows providing clear, low-distortion light paths for accurate absorbance readings.

• Versatility: Can have 4 optical windows (clear on all sides) for fluorescence or cross-measurements. Often supplied with an open top (for a lid or stopper) but can also come with caps if needed for airtight use.

Fabrication & Customization:

• Precision Construction: Manufactured with tight tolerance on the 10 mm path (typically within ±0.01 mm) to ensure consistent optical path length across cells. The optical faces are finely ground and polished for maximum transmission and minimal beam distortion.
• Fusion-Bonded Assembly: Premium cells are often fused from quartz pieces without adhesives, or even molded as one piece, yielding a seamless, leaktight cell that resists chemical attack and withstands extreme temperatures. This means standard quartz cuvettes are highly chemical-resistant and can even be used at elevated temperatures (quartz cells tolerate up to ~600–1200 °C in some cases).
• Custom Options: Qvarz can tailor rectangular cells in various path lengths, volumes, or materials (e.g. IR-grade quartz for infrared use) as needed, while maintaining the standard external footprint for compatibility.

Typical Use Cases:

• UV/VIS Absorbance Spectroscopy: Ideal for routine concentration measurements (e.g. DNA, protein assays, chemical absorbance) in spectrophotometers. The 10 mm path gives a convenient baseline sensitivity for most analyses.
• Fluorescence Measurements: Four-window rectangular cuvettes are used in fluorometers for right-angle fluorescence detection. Quartz material with four clear sides allows excitation and emission light to pass with minimal interference.
• General Analytical Chemistry: Employed in colorimetry, turbidity (with appropriate orientation), and any lab application requiring a known path length cell for liquids. The robust quartz construction handles a wide range of solvents and samples without leaching or reacting.

Instrument Compatibility:

• Universal Fit: These cells are designed to fit into standard 1 cm pathlength cuvette holders in spectrophotometers and fluorometers. Their dimensions and clear window alignment conform to international spectrometer standards, so almost any rectangular-cell instrument can accept them.
• Path Length Variants: If using alternate path lengths (e.g. 20, 50, 100 mm cells for increased sensitivity), an instrument may require adapter holders or special alignment – users should consult their spectrometer’s documentation for compatibility with larger cells. Standard 10 mm cells generally insert without any adapter.