Tag Archives: forensic evidence collection

Forensic Cotton Swab with Dual Sampling Heads

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The forensic cotton swab with dual sampling heads is a specialized tool for forensic evidence collection, enabling efficient dual-sample gathering with sterile cotton tips.

Core Content

  • Design: Dual cotton sampling heads (high-absorbent) on a sturdy plastic shaft; individually sealed in sterile packaging.
  • Usage: Use one head for primary sample collection, the other for duplicate/secondary sampling; place each in separate preservation tubes.

Key Features

  • Dual sampling: Two heads allow simultaneous or sequential collection without extra tools, saving time.
  • Sterile assurance: EO-sterilized cotton tips and packaging prevent cross-contamination of evidence.
  • High absorbency: Cotton material effectively captures liquid and trace biological samples (blood, saliva).
  • Cost-efficient: Reduces tool count while maintaining quality for multiple evidence points.

Application Scope

  • Crime scenes: Collecting bloodstains, saliva, or epithelial cells from weapons, clothing, or surfaces.
  • Forensic labs: Providing duplicate samples for parallel DNA testing and result verification.
  • Field investigations: Limited-tool scenarios needing dual samples (e.g., remote crime scenes).

Sterile Swabs for Blood, Saliva & Semen Collection

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Sterile biological evidence extraction swabs are specialized tools for collecting blood, saliva, and semen, ensuring forensic sample integrity for DNA analysis.

Core Content

  • Design: Flocked/foam heads (max sample retention) with breakable handles for easy tube transfer; pre-sterilized.
  • Usage: Swab target evidence (bloodstains, saliva traces, semen); place head in preservative tube; label and transport.

Key Features

  • Sterility: Single-use, tamper-evident packaging prevents contamination.
  • Versatility: Works for blood, saliva, semen on porous/non-porous surfaces.
  • High yield: Flocked heads retain 30-50% more cells than cotton swabs.
  • Forensic-compliant: Supports chain-of-custody and court admissibility.

Application Scope

  • Crime scenes: Homicides, assaults, sexual offenses for biological evidence.
  • Forensic labs: Processing trace evidence from weapons, clothing, surfaces.
  • Cold cases: Re-sampling old evidence to recover viable DNA.