In the field of spectral analysis, rectangular quartz cuvettes are the most essential sample holders in UV-visible spectrophotometry. Their high-purity quartz material provides broad-spectrum transmittance from 190 to 900 nm; in particular, the absence of absorption peaks in the UV range (190–400 nm) makes them an ideal choice for the quantification of nucleic acids and proteins, as well as the analysis of trace metals. Given the variety of instrument models, pathlength requirements, and specific sample conditions, standard specifications often fail to meet all experimental needs, making customized rectangular quartz cuvette solutions a growing focus for laboratory users worldwide.

Frequently Asked Questions (FAQ)

Q1: What is the key difference between rectangular quartz cuvettes and glass cuvettes?

The most critical difference lies in their transmittance in the UV range. Quartz cuvettes have a transmittance range of 190–900 nm, with a transmittance exceeding 80% at 200 nm, making them suitable for UV-range analysis; in contrast, glass cuvettes exhibit strong absorption below 320 nm and are only suitable for use in the visible light range (approximately 360 nm and above). If your experiments involve DNA/RNA quantification or require detection of characteristic UV absorption peaks, you must use quartz cuvettes to ensure data accuracy.

Q2: How do I select a rectangular cuvette with the appropriate path length based on the sample volume?

The path length (i.e., the internal width in the direction of light transmission) directly determines the detection sensitivity and the required sample volume. A standard 10-mm path-length cuvette is suitable for routine sample volumes of 3.5 mL; for precious or trace samples, short-pathlength cuvettes (1–5 mm) can be used, reducing the required sample volume to 0.35–1.7 mL; whereas for enhancing the detection signal of low-concentration samples, long-pathlength cuvettes (50–100 mm) are the appropriate choice. We can provide a full range of custom pathlength options based on your experimental needs.

Q3: Why is the fusion process important for rectangular cuvettes?

The fused-in-one process fuses quartz material into a single, seamless structure at high temperatures, eliminating any seams or adhesives and fundamentally preventing the risk of leakage. This makes them particularly suitable for testing volatile or highly corrosive solutions. Compared to products made using adhesive bonding, fused-in-one cuvettes feature smooth, impurity-free inner walls, with a path length accuracy of ±0.03 mm and a pairing error of less than 0.5%, significantly improving measurement repeatability.

Q4: What customization services does your company offer?

We accept customization based on provided drawings, samples, and specification parameters, including but not limited to: non-standard optical path lengths (1–100 mm and wider ranges); special shapes with heights and widths adapted to different instrument brands; four-way optical paths for fluorescence analysis; sealed versions with screw caps or PTFE caps; and black-walled light-shielding versions.

Core Features

1. High purity quartz material: 99.99% high purity fused quartz is used to ensure excellent optical transparency

2. Precision optical design: rectangular optical plane parallelism ≤ 3 ', precise control of optical path length

3. Spiral sealing cover system: special screw cover design to ensure sample sealing and easy operation

4. Wide spectral transmission range: 190-2500nm high transmittance, suitable for ultraviolet-visible-near infrared full-band measurement

5. Excellent temperature resistance: can withstand temperature changes from -100 ℃ to + 1200 ℃

Technical parameters

Material: High purity quartz

Optical path length: 10mm / 20mm / 50mm (customizable)

Volume: 3mL / 5mL / 10mL (standard specification)

Dimensional tolerance: ± 0.05mm

Transmittance: > 90% (190-2500nm)

Temperature resistance: -100 ℃ to + 1200 ℃

Chemical stability: acid and alkali resistance (except hydrofluoric acid and hot phosphoric acid)

Application

Typical application scenario

1. Ultraviolet-visible spectrophotometric analysis

- Suitable for high precision absorbance measurement

-Especially suitable for low concentration sample detection

- Available for dynamics studies and time-resolved measurements

2. Fluorescence spectrum analysis

- Low fluorescence background interference

- Precise sample positioning ensures fluorescence collection efficiency

-Suitable for fluorescence quantum yield determination

3. High temperature / low temperature spectroscopy

-Cooperate with temperature control accessories for temperature change experiments

-Study the changes in optical properties during the phase transition of materials

-Research on thermal denaturation of biological macromolecules

4. Analysis of corrosive samples

-Resistance to strong acid and alkali corrosion (except hydrofluoric acid)

-Suitable for electrochemical in-situ spectral monitoring

-Can be used for catalytic reaction process monitoring

Problem solved

1. Sample volatilization: Spiral cover design effectively prevents evaporation loss of volatile samples

2. Optical path control problem: accurate optical path length ensures the accuracy of measurement data

3. Temperature impact problem: excellent temperature resistance eliminates measurement errors caused by temperature changes

4. Cross contamination: chemically inert surfaces reduce sample adsorption and cross contamination

5. Convenience of operation: humanized design makes loading and cleaning more convenient

Customized service

We provide a full range of customized services to meet various special experimental needs:

Standard customization options

1. Size customization

-Optical path length: any customization within the range of 1mm-100mm

-Sample volume: 0.5mL-50mL multiple options

- Dimensions: Suitable for all types of spectrometer sample rooms

2. Interface customization

-Customization of import and export pipeline connectors

- Magnetic stirring unit integration

3. Functional enhancements

- Temperature control interface integration

- Multi-channel design

-Mobile sample cell renovation

We tailor our solutions to meet your experimental needs. Whether you require standard-specification off-the-shelf products or custom solutions for non-standard dimensions, please feel free to contact us at any time for professional technical advice and a quote. Let us provide you with reliable and precise optical container solutions for your spectral analysis.

For more product information or technical advice, please feel free to contact us.

Luverre Quartz manufactures and sells a wide range of high quality quartz glass, including quartz tubes, quartz plates, quartz rods, quartz windows, quartz crucibles, quartz boats, quartz flanges, quartz beakers, quartz glass instruments, and more. We can meet all kinds of customized requirements for quartz glass products.