SEM-EDS analysis and characterization of glitter and shimmer cosmetic particles.

Perpetrators are often aware of commonly used trace evidence in forensic casework, thereby limiting potential transfer during a crime. With the lack of common evidence left behind at a crime scene, consideration of alternative potential evidence is necessary. Glitter and shimmer particles from cosmetic products will potentially transfer from or onto an offender, crime scene, or victim.

Determining the effect of cartridge case coatings on GSR using post-fire priming cup residue.

Ammunition is typically composed of a lead-based priming mixture which contributes to the characteristics most commonly used for the identification of gunshot residue (GSR). Due to the health risks often associated with lead, the use of lead-free primers in ammunitions is becoming more popular. Thus, the presence of GSR is becoming more difficult to discern based on the traditional means, i.

Characterization of automobile float glass with laser-induced breakdown spectroscopy and laser ablation inductively coupled plasma mass spectrometry.

A comparative analysis of the discriminating power of laser-induced breakdown spectroscopy (LIBS) and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), each coupled with refractive index (RI) measurements, is presented for a study of 23 samples of automobile float glass. Elemental emission intensity ratios (LIBS) and elemental concentration ratios (LA-ICP-MS) and their associated confidence intervals were calculated for each float glass sample. The ratios and confidence intervals were used to determine the discrimination power of each analytical method.