LGI Labs

LGI Follows ISO/IEC 17025 guidelines for all type of analysis and is outfitted with the following instruments:

Scanning Electron Microscope with Electron Dispersive Spectroscopy (SEM/EDS) Provides analysis of the field of view or spot analyses of minute particles and has capability of detecting more than 90 elements using the SEM/EDS method. Forensic purposes include observing the surface of the fracture to determine mode of failure, metallurgical analysis and corrosion investigation.

  • LGI owns a 1455VP Zeiss SEM; low vacuum variable pressure mode system which can host polymer and ceramic material.
  • Varies in magnification from 12X-300,000X.
  • Normal turn around time per sample is 4 to 8 hours.

Fourier Transform Infrared Spectrometry (FTIR) Is a rapid non-destructive technique to identify chemicals that are either organic or inorganic. Forensic purposes include investigating debris from fires, explosion, unknown chemicals, drugs, plumbing system fittings, and polymers.

  • LGI owns a Thermo Scientific Nicolet IS10 Mid-IR System with ATR.
  • Solid, liquid or gaseous samples can be analyzed.
  • Normal turn around time per sample is 1 hour.

Metallography and Stereomicroscopy Forensic purposes include analysis of microstructure defects, corrosion, metal microstructure and material defects the use in the forensic industry, the microstructure is analyzed for manufacturing defects, grain boundary defects, incorrect alloy phases, selective leaching, etc.

  • LGI owns a NIKON Eclipse MA100 Inverted Materials Microscope Metallograph.
  • LGI owns a Nikon SMZ 1000 Zoom Stereomicroscope.
  • Metallograph magnification ranges from 50X-1000X.
  • Stereomicroscope magnification ranges from 8X-80X.
  • Normal turn around time per sample is 4 hours.

Micro and Macro Hardness Testing Determines properties of metal.

  • Macro hardness of materials is a fast and accurate method of determining the mechanical properties for a metal sample.
  • Micro hardness also determines the mechanical properties for materials with a fine microstructure and uses a microscope that can be converted to find the tensile strength of a material.
  • For forensic purposes the hardness and strength of material is compared against manufacturing data or national standards to confirm or deny if a material failed due to improper manufacturing.
  • Normal turn around time per sample is 4 hours.

Digital Radiography (X-ray) Digital Radiograph (X-ray)

  • Through outside vendors LGI has the capability of performing laboratory x-rays of a variety of materials from metals, and valves to debris and artifacts recovered from fire scenes.
  • Forensic applications include using an x-ray as a non destructive test to document the condition of a fire scene artifact before destructive disassembly, to look for signs of electrical activity on wires that are not visible due to melted material, and to examine a part for an internal fracture or crack.

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