Sciex Universal Vial Cap for 0.5 ml Vials Pack of 100 Caps

Sciex 144649 Vial Cap – For 0.5 mL Vials, Analytical Grade

The Sciex 144649 is a precision-engineered vial closure designed for the secure sealing of 0.5 mL sample vials in high-performance analytical environments. Manufactured from high-purity, chemically inert polyethylene, these caps provide a robust evaporation barrier, ensuring the integrity of micro-volume samples during long sequences in automated samplers. Specifically designed for compatibility with Sciex and Beckman Coulter Capillary Electrophoresis (CE) systems, the 144649 cap ensures a consistent seal that prevents sample concentration shifts and protects against environmental contamination. Its low-profile design and precision threading (or friction-fit, depending on vial type) allow for seamless interaction with robotic probes and autosampler needles, making it an essential component for reproducible results in pharmaceutical analysis, metabolomics, and glycan profiling.

Technical Performance and Design

• Enhanced Evaporation Control: Engineered with a specialized internal seal geometry that minimizes solvent loss, which is critical when working with volatile buffers or precious 0.5 mL micro-samples.

• Analytical Purity: Produced from low-extractable materials to ensure that no plasticizers or contaminants leach into the sample, maintaining the high signal-to-noise ratio required for MS and UV detection.

• Precision Fit: Specifically calibrated for 0.5 mL micro-vials (such as Sciex/Beckman P/N 144702), ensuring that the cap does not dislodge during high-speed tray movements or needle penetration.

• Chemically Resistant: The polyethylene construction offers broad compatibility with various aqueous buffers, acidic protein stabilizers, and organic modifiers commonly used in analytical chemistry.

Product Specifications

• Catalog Number: 144649

• Compatibility: Standard 0.5 mL Micro-Vials (Sciex/Beckman Coulter Systems)

• Material: High-Purity Polyethylene (PE)

• Color: Typically Translucent/Neutral

• Format: Bulk Packaged

Key Benefits & Applications

• Capillary Electrophoresis (CE): The gold standard for sealing samples in the PA 800 Plus and CESI 8000 systems, where precise sample volume is vital for injection reproducibility.

• Micro-LC & HPLC: Provides a reliable secondary seal for micro-vials in various liquid chromatography autosamplers that utilize 0.5 mL inserts or vials.

• Sample Archiving: Ideal for the short-to-medium term storage of purified fractions or concentrated protein samples where a secure, non-leaching closure is required.

• Automated Workflows: Designed to be easily handled by automated capping/decapping tools and to provide consistent resistance for autosampler needles, reducing the risk of needle bending or seal failure.

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