Overview
Glass thread sample bottles are specialized containers designed for laboratory use, featuring threaded necks to accommodate screw caps or closures. They are manufactured from high-quality borosilicate or soda-lime glass, ensuring resistance to thermal shock and chemical corrosion. These bottles are indispensable in research, pharmaceutical, and industrial settings where sample integrity is critical. The threaded design provides a leak-proof seal, preventing contamination and evaporation. Available in various sizes (e.g., 2ml to 1000ml) and often amber-colored for light-sensitive samples, these bottles comply with international standards like ISO 4796 and USP/EP requirements for laboratory glassware.
Structure and Working Principle
The bottle consists of a cylindrical body with a uniformly threaded neck, typically conforming to DIN or ISO thread standards (e.g., DIN 18/21). The threads allow for airtight sealing with compatible plastic or metal caps, often lined with PTFE or silicone septa for additional protection. The glass thickness is engineered to balance durability and clarity. Borosilicate variants (e.g., Schott Duran) withstand temperatures up to 500°C, while soda-lime glass is cost-effective for general use. The transparency enables visual inspection of contents, and some designs include graduation markings for approximate volume measurement.
Key Features
1. **Chemical Inertness**: Resists acids, alkalis, and organic solvents, ensuring sample purity. 2. **Thermal Stability**: Borosilicate types tolerate rapid temperature changes. 3. **Thread Precision**: Standardized threads ensure compatibility with common lab closures. 4. **Optical Clarity**: Ideal for visual analysis and UV-Vis spectroscopy. Additional variants may include amber glass (for UV protection), wide-mouth designs (for solid samples), or pre-sterilized options. Some bottles feature external labeling areas or frosted marking spots for identification.
Application Areas
Primary applications include pharmaceutical QC labs (for drug formulation samples), chemical manufacturing (intermediate storage), and environmental testing (water/soil samples). In HPLC and GC analysis, these bottles hold mobile phases or autosampler vials. Biotech industries use them for biological specimen preservation, while food labs employ them for flavor or additive analysis. Their reusability after proper cleaning makes them sustainable alternatives to plastic containers in regulated environments.
Maintenance and Precautions
Clean with laboratory-grade detergents or solvents (e.g., acetone for organic residues). Autoclaving is possible for borosilicate glass (121°C, 15-20 psi). Avoid abrasive scrubbers to prevent surface scratching. Store upright in padded racks to minimize breakage risks. Discard bottles with chips or cracks immediately. For hazardous samples, use secondary containment and label contents clearly. Thermal cycling (rapid hot-to-cold transitions) should be minimized to extend lifespan.
B2B Procurement Guide
Bulk purchases (100+ units) typically reduce costs by 20-30%. Verify certifications like ISO 9001 or USP Class I for regulated industries. Key suppliers include Schott, Corning, and DWK Life Sciences, with regional manufacturers offering competitive pricing. Consider lead times (2-8 weeks for custom sizes/threads) and MOQs (commonly 500-1000 units). Request material certificates and performance test reports. Eco-conscious buyers may seek recycled glass options or returnable packaging programs.
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