Sealed Micro Quartz Cuvettes
(Stopper / Screw-Top)
For ultraviolet, visible and infrared spectroscopic measurements of small liquid samples. Open-top, stopper and screw-top designs are available with short optical path lengths from 0.5 to 10 mm. Select according to sample volume, sealing requirements and measurement wavelength range.
Product Overview
Sealed micro quartz cuvettes are intended for measurements involving limited sample quantities, high absorbance, or a need to reduce evaporation and external contamination. Short-path designs reduce the distance light travels through the sample, supporting measurements of concentrated solutions or limited sample volumes.
The range includes UV and IR types with open-top, stopper and screw-top designs. A positioning clip for short-path cuvettes is also available to assist stable placement in the instrument's sample compartment.
Confirm the instrument beam height, sample compartment dimensions, measurement wavelength range, required optical path length, closure type, and sample compatibility with quartz, stoppers and sealing components. Confirm machining requirements before ordering custom specifications.
Closure Types
Specification Range
| Type / Specification | Optical Path Length | Description |
|---|---|---|
| Open-Top UV | 0.5 / 1 / 2 / 3 mm | Small-volume UV measurements |
| Open-Top IR | 0.5 mm | For infrared measurements |
| Screw-Top UV — Custom Order Required | 0.5 / 1 / 2 mm | Threaded closure; made to order |
| Stopper UV | 0.5 / 1 / 2 mm | Stopper closure |
| Stopper IR — Custom Order Required | 1 / 2 mm | IR type with stopper closure |
| Screw-Top IR — Custom Order Required | 1 / 2 / 5 / 10 mm | IR type with threaded closure |
| Short-Path Cuvette Positioning Clip | — | Assists mounting and positioning |
Product Features
Applications
How to Use
Inspect & Clean
Confirm that optical surfaces are clean and crack-free and that sealing components are in good condition.Fill Slowly
Use a micropipette to introduce the sample along the inner wall, avoiding bubbles.Close & Position
Fit the stopper or tighten the screw-top evenly. Install the positioning clip if required.Measure & Clean
Maintain a consistent optical orientation and clean promptly after measurement using an appropriate method.Selection Guide
| Requirement | Suggested Option | Key Checks |
|---|---|---|
| Routine rapid filling | Open-top | Wavelength range and path length |
| Reduced evaporation or contamination | Stopper | Stopper material compatibility |
| More stable closure | Screw-top | Threaded design and custom-order lead time |
| Concentrated or strongly absorbing samples | 0.5–2 mm short path | Instrument measurement range |
| Stable mounting assistance | Short-path cuvette positioning clip | Sample compartment and clip dimensions |
Cleaning & Maintenance
Frequently Asked Questions
How do I choose a 0.5 mm, 1 mm or longer optical path?
Consider a shorter path for concentrated or strongly absorbing samples and a longer path for weak absorption. Validate the choice using the Beer–Lambert law, sample absorbance and the instrument's measurement range.
What is the difference between stopper and screw-top designs?
Stopper designs allow quick opening and closing. Screw-top designs generally provide a more stable mechanical closure. Actual sealing performance also depends on the sealing components, assembly and sample properties.
Why do some specifications require a custom order?
Specific wavelength ranges, path lengths or closure designs may require separate machining and assembly. Confirm dimensions, quantity, lead time and the experimental medium before ordering.
What does the short-path cuvette positioning clip do?
It assists positioning of small or short-path cuvettes inside the sample compartment, improving placement stability and consistency between repeated measurements.
