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Custom Process-validated Quartz Digestion Tube for Regulatory Testing Labs-TOQUARTZ®
Key Features of Quartz Digestion Tube
TOQUARTZ® laboratory quartz digestion tubes are engineered for superior performance in demanding analytical chemistry applications. Manufactured from high-purity fused quartz, these vessels combine exceptional thermal, chemical, and mechanical properties essential for precise sample preparation.
Thermal Stability
Operates reliably at continuous temperatures up to 1100°C with short-term exposure capability up to 1200°C. Features extremely low thermal expansion coefficient (5.5×10⁻⁷ /°C) for excellent thermal shock resistance during rapid heating and cooling cycles.
Chemical Resistance
Withstands aggressive acids including HNO₃, HCl, and H₂SO₄ without degradation or contamination. Maintains sample purity during digestion processes with minimal leaching of elements, essential for trace metal analysis.
Connectivity Options
Available with various connection ports, ground glass joints, and custom fittings to integrate with existing laboratory systems. Customizable inlet/outlet configurations support specific analytical workflows and equipment compatibility requirements.
- Fused quartz with minimal trace element content
- >90% transmission in the 200-2500nm range
- Tight dimensional tolerances: ±0.1mm
Specifications of Quartz Digestion Tube
TOQUARTZ® quartz digestion tubes are manufactured to exacting standards to ensure optimal performance in demanding analytical applications. Each tube undergoes comprehensive quality control to verify dimensional accuracy and material properties.
Material Properties
| Parameter | Value |
| Material Composition | High-purity fused quartz (SiO₂ ≥99.995%) |
| Density | 2.2 g/cm³ |
| Thermal Expansion Coefficient | 5.5 × 10⁻⁷ /°C (20-1000°C) |
| Softening Point | 1730°C |
| Working Temperature | Continuous: 1100°C | Short-term: 1200°C |
| Thermal Conductivity | 1.4 W/m·K at 20°C |
| Electrical Resistivity | 7 × 10⁷ Ω·cm at 20°C |
| Chemical Resistance | Excellent resistance to all acids (including HF) except phosphoric acid at high temperatures |
| UV Transmission | >90% at 200-2500nm (1mm thickness) |
Standard Dimensions
| Parameter | Value |
| Inner Diameter Range | 20mm – 50mm (standard), custom sizes available |
| Wall Thickness | 1.5mm – 3.0mm (±0.1mm tolerance) |
| Standard Lengths | 100mm, 150mm, 200mm, 250mm, 300mm (custom lengths available) |
| Connection Types | Standard joints (14/20, 19/22, 24/40, 29/42), custom flanges, threaded connections |
| Surface Finish | Fire polished, acid etched, or precision ground |
TOQUARTZ® Solving Lab Challenges with Quartz Digestion Tube
Quartz Glass Digestion Tubes for Environmental Analysis
Key Advantages
-
EPA Method 3052-compliant geometry
Precisely engineered to support 0.5g–1.0g solid sample digestion with 50mL acid volume under EPA 3052 protocol. -
HF/HNO₃ acid resistance under 1200°C
Maintains structural integrity after 500+ cycles of mixed acid digestion at 1100°C with HF/HNO₃. -
Batch-to-batch dimensional repeatability ±0.1mm
Ensures consistent digestion efficiency across 100+ samples per day in automated workflows.
TOQUARTZ® solution
A German environmental testing lab processing 300+ soil samples/day faced 12% digestion failure using borosilicate vessels due to HF corrosion and thermal cracking. After switching to TOQUARTZ® digestion tubes, failure rate dropped below 1.5%, saving €8,400/month in rework costs and enabling full EPA 3052 compliance with validated batch uniformity.
Fused Silica Digestion Tubes for Food Safety Analysis
Key Advantages
-
Ultra-low trace metal background <0.05 ppm
Manufactured from 99.995% SiO₂ with certified impurity levels below 0.05 ppm for Pb, Cd, Hg, and As. -
No boron interference in pesticide residue tests
Eliminates boron leaching common in borosilicate tubes, critical for organophosphate detection. -
Surface roughness ≤0.8μm for residue-free rinsing
Minimizes analyte retention, improving recovery rates in ppb-level heavy metal quantification.
TOQUARTZ® solution
A Japanese food safety lab reported inconsistent arsenic recovery (avg. 81%) in seafood samples using standard glassware. TOQUARTZ® digestion tubes improved recovery to 96.7% (n=30), reducing false negatives by 18% and aligning with Japan MHLW Method 101 for trace metal detection.
Fused Quartz Digestion Tubes for Advanced Research Applications
Key Advantages
-
Multi-port customization with ±0.1mm concentricity
Supports complex reagent injection protocols in isotope fractionation and catalytic studies. -
Non-standard geometries: conical, bulb, dual-chamber
Enables novel reaction pathways not feasible with commercial cylindrical vessels. -
Optical-grade clarity >92% @ 200–800nm
Allows real-time spectroscopic monitoring during digestion or photochemical reactions.
TOQUARTZ® solution
A Canadian university research team required a dual-inlet digestion vessel for isotope-labeled compound synthesis under UV exposure. TOQUARTZ® delivered a custom quartz digestion tube with 3 precision-aligned ports and 92% UV transmittance, reducing setup time by 60% and enabling reproducible results across 5 experimental runs.
TOQUARTZ® Customized Services for Quartz Digestion Tube
TOQUARTZ® offers comprehensive customization services for laboratory quartz digestion tubes tailored to your specific analytical requirements. Our engineering team works directly with customers to design optimal solutions for challenging applications.
Dimensional Specifications
- Custom internal/external diameters from 10mm to 100mm
- Wall thickness optimization for specific thermal requirements
- Precision length tolerances to ±0.5mm
- Custom shapes including tapered, bulb-bottom, or conical designs
Connection Interfaces
- Ground glass joints in standard or custom sizes
- O-ring seal flanges for vacuum applications
- Multiple inlet/outlet ports in customized positions
- Instrument-specific adapter fittings
Material Enhancements
- Specialized surface treatments for improved cleaning
- UV-opaque options for light-sensitive applications
- Graduated volume markings for precise measurements
- Custom identifiers for inventory management
Usage Guidelines for Quartz Digestion Tube
Proper handling and maintenance of quartz digestion tubes ensures optimal performance and extended service life. Follow these best practices for preparation, operation, cleaning, and storage.
Preparation
- Inspect for cracks or damage before each use
- Clean with ultrapure water and dry completely
- Pre-condition with dilute acid (5% HNO₃) before first use
- Verify compatibility with heating system and mounting fixtures
Operation
- Heat gradually to avoid thermal shock (≤5°C/minute)
- Maintain even temperature distribution
- Do not exceed 1100°C for continuous operation
- Use proper support fixtures to prevent stress
- Avoid direct flame contact
Cleaning
- Rinse with deionized water immediately after use
- For stubborn residues, soak in 10% HNO₃ overnight
- Avoid abrasive cleaners that can scratch surfaces
- For organic residues, use piranha solution (H₂SO₄/H₂O₂)
- Final rinse with ultrapure water and air dry
Storage
- Store in clean, dust-free environment
- Use protective cases or wrap in lint-free cloth
- Avoid contact with hard surfaces that may cause chips
- Store vertically when possible to prevent rolling
- Label with usage history for traceability
· Perform periodic annealing at 1000°C to relieve thermal stress
· Maintain detailed usage logs to track exposure to different reagents
· Rotate inventory to distribute wear evenly across multiple tubes
· Schedule preventative replacement for tubes used in critical applications
Need engineering assistance?
Get expert guidance on material selection, dimensional specifications, and integration with your analytical systems.
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.
PERGUNTAS FREQUENTES
Q: What is a quartz digestion tube used for?
A: Quartz digestion tubes are specialized laboratory vessels used for sample preparation in analytical chemistry, particularly for decomposing solid samples into solution for elemental analysis. They are primarily used in acid digestion processes where samples are treated with strong acids (such as HNO₃, HCl, HF) at high temperatures to dissolve metals and other elements for subsequent analysis by techniques like ICP-OES, ICP-MS, or AAS. Their high chemical resistance, thermal stability, and purity make them ideal for applications requiring minimal sample contamination.
Q: What is the temperature resistance of quartz digestion vessels?
A: TOQUARTZ® quartz digestion vessels maintain structural integrity at continuous operating temperatures up to 1100°C and can withstand short-term exposure up to 1200°C. The softening point of high-purity fused quartz is approximately 1730°C, but practical operating limits are lower to maintain dimensional stability and prevent deformation. Quartz has an exceptionally low thermal expansion coefficient (5.5 × 10⁻⁷ /°C), which provides excellent resistance to thermal shock during rapid heating and cooling cycles, a critical advantage over borosilicate glassware which typically has operating limits around 500-600°C.
Q: What is the difference between borosilicate and quartz digestion tubes?
A: Quartz digestion tubes offer several significant advantages over borosilicate alternatives:
1. Temperature resistance:
Quartz withstands temperatures up to 1100°C continuously, while borosilicate is limited to approximately 500-600°C;
2. Chemical purity:
High-purity quartz (99.995% SiO₂) contains fewer trace elements than borosilicate glass, resulting in lower background contamination;
3. Acid resistance:
Quartz has superior resistance to hydrofluoric acid (HF) and concentrated mineral acids, which can attack borosilicate glass;
4. Thermal shock resistance:
Quartz’s lower thermal expansion coefficient provides better stability during rapid temperature changes;
5. UV transparency:
Quartz transmits UV light, while borosilicate blocks most UV wavelengths, making quartz suitable for photochemical applications
The primary disadvantages of quartz compared to borosilicate are higher cost and slightly greater brittleness, but these are generally outweighed by the performance benefits in demanding analytical applications.
Q: How long do quartz digestion tubes typically last?
A: The service life of quartz digestion tubes varies depending on operating conditions, maintenance practices, and specific applications. Under typical laboratory conditions with proper handling and maintenance:
· Standard analytical applications (HNO₃/HCl digestions): 300-500 cycles
· HF-containing digestions: 100-200 cycles (depending on concentration)
· High-temperature applications (>900°C): 200-300 cycles
Factors that can reduce service life include:
· Rapid thermal cycling without adequate heating/cooling rates
· Mechanical stress from improper handling or mounting
· Extended exposure to highly alkaline solutions (pH >10)
· Physical impacts or abrasion
Laboratories performing critical trace element analysis often implement replacement schedules based on usage counts rather than waiting for visible deterioration, as microscopic surface changes can affect analytical performance before becoming visibly apparent. With proper care and regular inspection, TOQUARTZ digestion tubes provide exceptional longevity and value compared to other digestion vessel materials.
Q: Are quartz digestion tubes suitable for microwave digestion systems?
A: Quartz digestion tubes are excellent inner vessels for microwave digestion systems, but with important considerations. While quartz itself is microwave-transparent (it does not directly absorb microwave energy), it is ideally suited as liner vessels within microwave digestion systems for several reasons:
· Chemical resistance: Withstands aggressive acid mixtures used in microwave digestion
· Temperature stability: Maintains integrity during rapid heating from the digestion solution
· Purity: Contributes minimal contamination to sensitive analyses
· Transparency: Allows visual monitoring when used in camera-equipped systems
Important considerations for microwave applications:
· Quartz vessels must be used within pressure-containing outer vessels (typically PTFE or modified TFM)
· Dimensional specifications must be precise to fit within manufacturer-specific microwave digestion
· Special attention to wall thickness consistency is critical for even heating
· hermal expansion must be accounted for in the design
TOQUARTZ manufactures custom quartz digestion tube liners compatible with major microwave digestion system brands including CEM, Milestone, Anton Paar, and Berghof. For microwave applications, we recommend consulting with our engineering team to ensure proper specifications for your specific digestion system.
Contact our engineering team for technical consultation and pricing. We’ll help you select the optimal specifications for your application requirements.
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