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Sealed-Structure Quartz Screw Cap Cuvette for Infrared Fluorescence Spectroscopy in Analytical Labs -TOQUARTZ®
Features of Quartz Screw Cap Cuvette for Infrared Fluorescence Spectroscopy
TOQUARTZ® infrared quartz cuvettes with screw caps combine premium material quality with precision manufacturing to deliver optimal performance for your spectroscopic applications.
Airtight PTFE Sealing
Precision-threaded neck with PTFE screw cap provides reliable sealing for volatile or air-sensitive samples, reducing evaporation and preventing contamination during analysis.
High Material Purity
Manufactured from synthetic quartz with ≥99.98% SiO₂ purity (up to 99.995%), ensuring minimal interference with spectroscopic measurements and excellent chemical stability.
Optical Properties
Transmittance >80% across 300-3500nm wavelength range, with no absorption peaks. Ideal for infrared, visible, and near-infrared spectroscopy applications requiring consistent optical performance.
- Resistance to acids, bases, salts, and fluorinated gases
- Withstands temperatures up to 1100°C
-
Manufactured to
tight tolerance of ±0.1mm
Technical Specifications & Dimensions of Quartz Screw Cap IR Cuvette
Technical Specifications
| Property | Specification |
| 1. Physical Properties | |
| Material | Synthetic quartz |
| Material Purity | ≥99.98% SiO₂ (up to 99.995%) |
| Dimensional Tolerance | ±0.1mm |
| Cap Material | PTFE |
| Surface Finish | Optically polished, no bubbles or striations |
| Temperature Resistance | Up to 1100°C |
| 2. Chemical Properties | |
| Acid Resistance | Excellent (except HF) |
| Alkali Resistance | Excellent |
| Solvent Compatibility | Universal |
| Water Absorption | Nil |
| Gas Permeability | Negligible |
| Thermal Expansion | 5.5×10-7/℃ |
| Max Operating Temp | 1100℃ |
| 3. Optical Properties | |
| Wavelength Range | 300-3500nm |
| Transmittance | >80% (Paired Testing) |
| Refractive Index | 1.46 at 589.3nm |
| Surface Quality | Optical polish |
| Surface Flatness | λ/4 at 632.8nm |
| Bubble/Inclusion | None in optical path |
| Absorption Peaks | None in specified range |
Size Chart
| Model | Description | Wavelength | Path Length | Volume | Transmittance | Outline Dimension |
| AT-BSM-2003 | 3.5ml Quartz Screw Cap Cuvette for Infrared Fluorescence Spectroscopy | 300nm-3500nm | 10mm | 3.5ml | >80% (Paired Testing) | 12.5×12.5×55 mm |
TOQUARTZ® Solving Critical Challenges with Quartz Screw Cap IR Cuvette
Quartz Screw Cap Cuvette for Fluorescence-Based Drug Stability Testing in Pharmaceutical R&D
Key Advantages
- Airtight PTFE cap prevents >95% ethanol evaporation over 6-hour IR exposure
- Threaded seal maintains <1.5% concentration drift in DMSO-based assays
- 10mm path length deviation controlled within ±0.05mm for kinetic repeatability
TOQUARTZ® solution
A pharmaceutical R&D center in New Jersey reported 14–18% signal drift during 8-hour photostability tests using open-top cuvettes with ethanol-based formulations. After switching to TOQUARTZ® screw cap cuvettes, solvent loss dropped below 3%, and signal deviation was reduced to under 1.2%. This improved assay repeatability by 42% and enabled FDA-compliant long-term degradation studies.
Quartz Screw Cap Cuvette for Protein Fluorescence Analysis in Biotech Labs
Key Advantages
- PTFE screw cap reduces oxygen ingress by 87% compared to open-top cuvettes
- Enables stable fluorescence signal for >4 hours in BSA-FITC binding assays
- Maintains microbial-free conditions for 48h without autoclaving
TOQUARTZ® solution
A biotech lab in Seoul conducting protein-ligand binding assays using FITC-labeled BSA observed 22% signal quenching within 2 hours due to oxygen exposure. After adopting TOQUARTZ® screw cap cuvettes, oxygen ingress was minimized, and signal stability was maintained for over 5 hours. This reduced false-negative rates by 31% and improved assay reproducibility across 3 independent batches.
Quartz Screw Cap Cuvette for VOC Detection in Environmental Fluorescence Monitoring
Key Advantages
- Sealed cuvette retains >92% of benzene signal after 30-minute field transport
- Prevents >25% VOC loss during 15-minute IR fluorescence scan
- Compatible with EPA Method 8260B for VOC quantification in aqueous samples
TOQUARTZ® solution
An environmental testing agency in Hamburg used open cuvettes for VOC detection in groundwater, resulting in 28% average signal loss for toluene and benzene during transport. After switching to TOQUARTZ® screw cap cuvettes, VOC retention improved to 93–95%, enabling accurate reporting under EU Directive 2008/105/EC and reducing retesting costs by €1,200 per month.
Customization Services for TOQUARTZ® Quartz Screw Cap IR Cuvette
Custom Dimensional Options
- Path Length: Available from 0.5mm to 100mm with ±0.1mm precision
- Cell Volume: Micro-volume options (0.5ml to 3.5ml) and larger capacities (up to 50ml)
- External Dimensions: Modified width/height to fit specialized instrument holders
- Wall Thickness: Adjustable from 0.5mm to 2.0mm for specific applications
Specialized Closures
- Flow-Through Design: With inlet/outlet ports for continuous flow analysis
- High-Temperature Variants: Reinforced design for extended use up to 1100°C
- Optical Window Materials: Specialized windows for extended wavelength ranges
- Micro-Cuvette Options: For sample-limited applications requiring minimal volumes
Custom Engineering Process
Initial Consultation
TOQUARTZ® engineering team discusses your specific requirements, application parameters, and technical challenges.
Technical Drawing & Review
We provide detailed technical drawings for your approval, ensuring all specifications meet your needs.
Prototype Development
For new designs, we can produce a limited number of prototypes for testing and validation.
Production & Quality Control
Following approval, we manufacture your custom cuvettes with comprehensive quality verification.
Usage Guide of Quartz Screw Cap Cuvette for Infrared Fluorescence Spectroscopy
Handling & Operation
- Handle cuvettes by the frosted or top portions only to avoid fingerprints on optical surfaces
- Tighten screw caps firmly but not excessively to prevent damage to threads
- Fill to approximately 80% capacity to allow for thermal expansion
- For maximum accuracy, always use the same orientation in the spectrophotometer
- Avoid rapid temperature changes that may cause thermal shock and potential fractures
Cleaning & Maintenance
- Clean immediately after use to prevent sample residue buildup
- Rinse with appropriate solvent, followed by analytical-grade acetone or methanol
- For stubborn residues, soak in 10% laboratory-grade detergent solution for 30 minutes
- Air dry completely before storage or use lint-free optical wipes for drying
- Never use abrasive cleaners or brushes that could scratch optical surfaces
Storage Recommendations
- Store in original protective case or dedicated cuvette rack
- Keep in dust-free, dry environment at room temperature
- For long-term storage, clean thoroughly and confirm complete dryness
- Avoid direct contact with other cuvettes or hard surfaces that may cause scratches
Troubleshooting
- Leaking cap: Inspect PTFE cap for damage; replace if necessary. Check for debris on threads.
- Inconsistent readings: Ensure optical surfaces are clean and free of fingerprints or residue.
- Baseline drift: Verify proper temperature equilibration before measurement.
- Visual defects: Contact TOQUARTZ® support for evaluation and possible replacement.
Need Expert Assistance with Your Spectroscopy Application?
your specific infrared fluorescence application.
Why Partner with TOQUARTZ
Direct Factory Advantage
As a direct manufacturer, we can cut out the numerous intermediate links.
Engineering Expertise
Technical team guides clients from material selection to design optimization, translating specs into deliverables.
Flexible Manufacturing
Handling standard & custom orders via small-batch expertise and prototyping rigor to meet urgent deadlines.
Quality
Assurance
Pre-shipment 3-step validation:
1. dimensional accuracy,
2. material purity ,
3. performance thresholds
Global Supply Chain
Reliable global logistics to industrial hubs (DE/US/JP/KR priority) with trackable milestones.
Releted Products
As a specialized manufacturer with direct factory capabilities, TOQUARTZ provides both standard and custom quartz solutions with engineering support throughout the specification and implementation process.
FAQ
Q: What are the advantages of screw cap cuvettes over standard open-top models?
A: Screw cap cuvettes provide airtight sealing that prevents sample evaporation, contamination, and oxidation. This is crucial for volatile samples or those sensitive to air exposure. The PTFE caps offer excellent chemical resistance and maintain sample integrity during storage or extended measurement periods. They also minimize the risk of spillage during handling and transportation between instruments.
Q: How long can samples be stored in the quartz screw cap IR cuvettes?
A: With proper PTFE cap sealing, samples can typically be stored in these cuvettes for up to 72 hours with minimal evaporation or contamination. For longer storage, factors such as sample volatility, light sensitivity, and chemical stability become important considerations. We recommend conducting stability tests for your specific samples if extended storage is required.
Q: Are the quartz screw cap IR cuvettes autoclavable for sterilization?
A: The quartz material is autoclavable, but standard PTFE caps should be removed before autoclaving as they may deform at typical autoclave temperatures (121°C). For applications requiring frequent sterilization, we offer specialized high-temperature silicone caps that can withstand autoclave conditions. Alternatively, chemical sterilization using 70% ethanol or other appropriate disinfectants is recommended to preserve cap integrity.
Q: What is the maximum temperature the quartz screw cap IR cuvettes can withstand?
A: The quartz material itself can withstand temperatures up to 1100°C. However, the practical temperature limit for assembled cuvettes with PTFE caps is approximately 260°C (the temperature limit of PTFE). For applications requiring higher temperatures, we offer specialized high-temperature caps or stoppers on request. Always avoid rapid temperature changes to prevent thermal shock.
Q: Are the quartz screw cap IR cuvettes compatible with standard spectrophotometer holders?
A: Yes, our standard quartz screw cap cuvettes (model AT-BSM-2003) are designed with 12.5mm x 12.5mm external dimensions to fit most standard spectrophotometer cuvette holders. For instruments with non-standard holders, we offer custom sizing options through our customization service. Always verify your instrument’s holder specifications before ordering.
Contact our engineering team for technical consultation and pricing. We’ll help you select the optimal specifications for your application requirements.