Glass Beads, Acid-Washed (215–300 µm), High Purity – Catalog #B2025504

Glass Beads, Acid-Washed (215–300 µm; Catalog #B2025504) are inert, high-purity spherical glass particles designed for mechanical cell disruption in bead beating applications. Supplied as 5 g of beads, these medium-sized particles are optimized for rapid, efficient lysis of bacterial, fungal, yeast, and plant cells, and for tissue disruption in sample preparation workflows. Acid washing removes surface metal oxides, proteins, and biofilm contaminants, ensuring low background contamination in downstream analyses such as DNA and RNA extraction.

Scientific Overview

Glass beads are among the oldest and most effective tools for mechanical cell disruption. Their inert composition, durability, and cost-effectiveness have made them a standard in laboratory automation and high-throughput sample preparation. Borosilicate glass (commonly Corning® Pyrex®) resists chemical attack and thermal shock, ensuring consistent performance across many uses. The 215–300 µm size range offers a balance suitable for small bacterial and fungal cells: large enough to generate effective shear forces during beating but small enough to disrupt tightly walled cells efficiently. Acid washing removes surface contamination, metal oxides, and organic residues that could interfere with enzymatic assays, protein analysis, or nucleic acid quantification.

Key applications include:

• Bacterial and fungal cell lysis for DNA/RNA extraction
• Tissue and plant material disruption
• Protein extraction from cells and tissues
• Sample homogenization in genomics and proteomics workflows
• Enzyme and organelle extraction
• High-throughput sample preparation in automated workflows

Usage & Handling Guidance

Beads are used in mechanical disruption devices (bead beaters, tissue homogenizers, or vortex-mounted bead beating tubes). Fill the disruption tube to about two-thirds capacity with beads, add sample (cells in lysis buffer), and beat for 15–60 seconds at high speed, depending on cell type and desired disruption efficiency. For RNA work, use RNase-free beads and beaters. The acid-washed surface helps minimize contamination, but ensure all equipment is clean and sterile for sensitive applications.

• Tube loading: ~2/3 fill with beads, ~1/3 with sample (adjust for downstream analysis requirements).
• Beating parameters: Typically 5,000–7,000 rpm for 15–60 seconds; optimize for your cell type and instrument.
• Cooling: If not already cooled, use pre-cooled tubes and buffers or add cooling time between beats to prevent sample degradation.
• Reuse: Beads can be reused after thorough washing and drying, or autoclaved if thermal stability is acceptable.

What You Get

• 5 g of high-purity, acid-washed borosilicate glass beads
• Beads sized 215–300 µm, optimized for bacterial, fungal, and plant cell disruption
• Low contamination and minimal metal leaching for sensitive downstream assays
• For research use only (RUO)

Why Researchers Choose It

• Consistent, reproducible cell disruption across a wide range of sample types
• Acid washing reduces background contamination in genomic and proteomic analyses
• Inert borosilicate glass is compatible with harsh lysis buffers and organic solvents
• Durable and reusable, reducing per-sample cost in high-throughput workflows

Frequently Asked Questions (FAQ)

• How much sample disruption will I get with these beads?
  Disruption efficiency depends on beating intensity, duration, sample viscosity, and cell wall thickness. Optimize by testing disruption time (typically 15–60 seconds) and rpm with your bead beater and cell type.
• Can I use these for RNA extraction?
  Yes, use RNase-free tubes and beaters, and keep samples on ice or in cooled conditions during beating.
• Can the beads be reused?
  Yes. Wash thoroughly with deionized water, dry completely at room temperature or in an oven (do not exceed 200°C for extended periods), and autoclave if desired before reuse.
• What is the acid-washing process?
  Beads are treated with dilute hydrochloric acid or similar to remove surface metal oxides, proteins, and biofilm, then rinsed and dried.
• How should I store them?
  Keep in a dry container at room temperature. Avoid moisture to prevent clumping.

References

• DeCaprio J, Kohl TO. Lysing Yeast Cells with Glass Beads for Immunoprecipitation. Cold Spring Harb Protoc. 2020;2020(11).
• Hwang KY, Kwon SH, Jung SO, Lim HK, Jung WJ, Park CS, Kim JH, Suh KY, Huh N. Miniaturized bead-beating device to automate full DNA sample preparation processes for gram-positive bacteria. Lab Chip. 2011;11(21):3649-55.
• Roberts AV. The use of bead beating to prepare suspensions of nuclei for flow cytometry from fresh leaves, herbarium leaves, petals and pollen. Cytometry A. 2007;71(12):1039-44.