Overview
Micro sample vials are specialized containers designed to hold small volumes (typically 0.1–2 mL) of liquid or solid samples for laboratory analysis. They are critical in fields requiring high precision, such as chromatography (HPLC, GC), mass spectrometry, and clinical diagnostics. These vials are manufactured from materials like borosilicate glass or inert plastics to minimize sample contamination. Standard designs include screw caps with PTFE/silicone septa to ensure airtight sealing and prevent evaporation or leakage during handling or storage.
Physical and Chemical Properties
Borosilicate glass vials offer excellent thermal stability (withstand temperatures up to 400°C) and resistance to most acids, bases, and organic solvents. Plastic variants (e.g., polypropylene) are lightweight and shatterproof but may have lower solvent compatibility. Key metrics include volume accuracy (±1–2%), dimensional consistency (e.g., 12–32 mm height for autosamplers), and low extractables/leachables. Glass vials often undergo surface silanization to reduce analyte adsorption, especially for sensitive applications like trace analysis.
Main Applications
Micro vials are indispensable in analytical laboratories for sample preparation and instrument injection. They are used in pharmaceutical quality control (e.g., potency testing), environmental monitoring (e.g., pesticide residue analysis), and biomedical research (e.g., metabolomics). Automated systems rely on standardized vial formats to ensure reproducibility. Specialized variants include amber vials for light-sensitive samples and pre-silanized vials for biomolecules like proteins or peptides.
Safety and Storage
Store vials in clean, dry environments to prevent contamination. Glass vials are fragile; handle with care to avoid breakage. Use caps with proper septa to minimize volatile loss and cross-contamination. For hazardous samples (e.g., toxic chemicals), select vials with leak-proof certifications (e.g., EPA-compliant). Dispose of used vials according to local regulations—glass vials may require decontamination before recycling.
B2B Procurement Guide
When sourcing micro vials, prioritize suppliers with ISO 9001 certification to ensure consistent quality. Bulk purchases (100+ units) typically reduce costs by 10–30%. Key considerations include batch-to-batch consistency, documentation (e.g., CoA), and compatibility with existing lab equipment. For high-throughput labs, pre-assembled vials with caps/septa save time. Custom printing (e.g., barcodes) aids sample tracking. Compare lead times—glass vials may have longer production cycles than plastic alternatives.
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