High-Purity Fused Silica Labware for Chemical Analysis and Scientific Research.
Our laboratory quartz glassware collection is specifically engineered for high-precision environments where standard borosilicate glass fails. Manufactured from high-purity fused silica (SiO2 > 99.99%), products such as our quartz test tube and quartz sample tube provide the extreme thermal stability and chemical inertness required for sensitive analytical chemistry. From university research labs to industrial quality control, our quartz glass ensures zero metallic contamination and unmatched optical clarity.
Technical Specifications (Standard Datasheet)
| Property | Industrial Grade Specification |
| Material Type | High-Purity Fused Silica (Quartz) |
| Chemical Purity (SiO2) | More than 99.99% |
| Max Continuous Temp | 1100°C |
| Peak Temp (Short-term) | 1250°C |
| Thermal Expansion | 5.5 x 10^-7/°C |
| Optical Transmission | Over 90% (254nm – 2500nm) |
| Chemical Resistance | Class 1 (Acid Resistant) |
| Surface Finish | Optical Grade Clear / Precision Ground |
Precision Quartz Test Tube for High-Temperature Reactions
The quartz test tube is an indispensable tool for chemists working with aggressive reagents or extreme thermal gradients. Unlike common laboratory glass, a quartz test tube can be heated to over 1000°C and then immediately plunged into cold water without cracking.
This exceptional thermal shock resistance allows researchers to perform rapid combustion analysis and high-temperature synthesis safely. We offer a wide range of specifications, including:
- Round Bottom Test Tubes: Standard for centrifugation and general chemical mixing.
- Flat Bottom Test Tubes: Ideal for standing on hot plates or within heating blocks.
- Graduated Quartz Tubes: Precision-etched markings for accurate volume measurement during sensitive experiments.
High-Performance Quartz NMR Tube & Sample Tubing
For analytical techniques such as Nuclear Magnetic Resonance (NMR) spectroscopy, material purity is paramount. Our quartz nmr tube products are manufactured with strict dimensional tolerances to ensure optimal spinning stability and magnetic field homogeneity.
Why Choose a Quartz NMR Tube?
Standard glass contains trace amounts of Boron and other metals that can interfere with sensitive spectrum readings. A high-purity quartz nmr tube eliminates these background “noise” signals, providing the cleanest possible data for researchers. Similarly, our quartz sample tube solutions are used in gas chromatography and mass spectrometry (GC/MS) to ensure that the sample environment remains entirely inert, preventing any catalytic reactions between the sample and the vessel wall.
Chemical Inertness and Purity Standards
The primary reason laboratories transition to a quartz sample tube or quartz test tube is the demand for sub-ppm purity. Our fused silica is virtually free from heavy metals and alkaline earth elements.
1. Acid and Corrosion Resistance
Our laboratory quartz glassware is highly resistant to almost all acidic solutions, including high concentrations of sulfuric, nitric, and hydrochloric acids at boiling temperatures. This makes the quartz test tube the only viable option for acid digestion and mineral analysis in geochemistry and environmental testing. Note: Hydrofluoric acid (HF) and phosphoric acid at very high temperatures are the only chemicals known to significantly etch quartz glass.
2. Optical Clarity for Spectroscopy
The broad spectral transmission of our quartz sample tube—ranging from deep ultraviolet (UV) to near-infrared (IR)—allows for direct spectroscopic measurement through the tube wall. This eliminates the need for sample transfer, reducing the risk of contamination and evaporation loss.
Custom Fabrication for Specialized Research
As a factory-direct manufacturer, we understand that scientific breakthroughs often require custom designs. We support specialized modifications for all laboratory quartz glassware:
- Standard Tapered Joints: Welding of 14/23, 19/26, or 24/29 ground joints for vacuum-tight integration with other lab apparatus.
- Custom Capillary Tubes: Precision-drawn quartz sample tube variants for microfluidics and specialized fiber optic research.
- Quartz-to-Metal Seals: Enabling the connection of quartz vessels to stainless steel vacuum lines or gas delivery systems.
- NMR Tube Refurbishment: Precision cutting and re-sealing of high-value quartz nmr tube components.
Quality Assurance and Lab-Grade Testing
To guarantee the reliability of every quartz test tube and quartz nmr tube, we perform intensive quality checks:
- Dimensional Verification: Using digital calipers and laser micrometers to ensure OD, ID, and wall thickness consistency.
- Annealing Protocol: Every piece of laboratory quartz glassware is annealed to remove internal stresses, preventing spontaneous breakage during heating.
- Visual Inspection: Each quartz sample tube is inspected under 10x magnification to ensure there are no air bubbles, inclusions, or surface scratches that could affect experimental results.
Maintenance and Cleaning Protocols
To maintain the superior performance of your quartz test tube and analytical glassware:
- Strict Handling: Always wear lint-free, powder-free gloves. Fingerprints can lead to devitrification (cloudiness) when the quartz is heated to high temperatures.
- Solvent Cleaning: Most contaminants can be removed using high-purity solvents or a 10% nitric acid soak followed by multiple rinses with deionized water.
- Drying: Air dry in a dust-free environment or use an oven at 110°C to ensure no moisture remains inside the quartz nmr tube or sample vessels.
- Reference: For information on the raw fused silica used in our labware, please refer to our Clear Quartz Tubes section.