AI Article Synopsis
- Paints, particularly spray paints, contain volatile organic compounds (VOCs) that serve as valuable physical evidence in crime scenes.
- This research utilizes solid-phase microextraction-gas chromatography-mass spectrometry (SPME-GC-MS) to analyze these VOCs and track their presence over a 4-hour period in 30-minute intervals.
- Results indicate that while most VOCs dissipate quickly, certain aromatic compounds and longer hydrocarbon chains are more persistent, which could aid forensic investigations in determining how long a spray-painted surface has been there.
Article Abstract
Paints are a common form of physical evidence encountered at crime scenes. This research presents an optimized method for the untargeted analysis of volatile organic compounds (VOCs) in spray paint using solid-phase microextraction-gas chromatography-mass spectrometry (SPME-GC-MS). The presence and persistence of VOCs were monitored in 30 minute intervals, over a 4 hour period, in a triplicate time study. As predicted, spray paint solvents are lost to the environment readily, whereas few VOCs remained present in the headspace in low concentrations beyond 4 hours. The VOCs that were observed to have the highest persistence in the headspace were aromatic compounds and those with longer hydrocarbon chains. We present this study in a forensic science context and suggest that the interpretation of the results may be useful for forensic applications in establishing a time since deposition of a spray-painted surface.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1093/chromsci/bmaa082 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
High risk and low incidence diseases: High-pressure injection injury.
Am J Emerg Med
November 2024
Department of Emergency Medicine, Brooke Army Medical Center, Fort Sam Houston, TX, USA. Electronic address:
Article Synopsis
- High-pressure injection injuries are serious and often overlooked conditions caused by accidents with powerful machines, primarily affecting the nondominant hand.
- These injuries can inject hazardous substances like paint and diesel oil, leading to significant complications, and require careful assessment through imaging to determine the extent of damage.
- Effective management includes urgent surgical consultation, proper wound care, monitoring, and potential surgery to improve patient outcomes.
Fractionation of Kraft Lignin for Production of Alkyd Resins for Biobased Coatings with Oxidized Lignin Dispersants as a Co-Product.
ACS Omega
November 2024
VTT Technical Research Centre of Finland Ltd., P.O. Box 1000, FI-02044 Espoo, Finland.
A new valorization pathway based on solvent fractionation was applied to kraft lignin, a major by-stream of the pulping industry, to extract a soluble lignin intermediate featuring an improved structural homogeneity, a low molecular weight, and a high content of phenolic hydroxyl and carboxylic acid groups to serve as a substitute of the nonrenewable polyacids in the formulation of alkyd resins, a dominant material used in the production of anticorrosion surface coatings. Herein, softwood kraft lignin was mixed in a low-cost green solvent, aqueous ethanol, prepared at different ratios, at room temperature to generate a soluble fraction of a low of ≤2200 g mol and an insoluble fraction of a high of ≥3950 g mol of lignin. The best combination of yields and molecular weights of soluble lignin (16-36% yield, 1740-1890 g mol) was attained using 50-80 vol % ethanol in fractionation.
View Article and Find Full Text PDFSpray paint-derived microplastics and incorporated substances as ecotoxicological contaminants in the neotropical bumblebee Bombus atratus.
Environ Toxicol Pharmacol
December 2024
Federal University of São Carlos (UFSCar), Department of Biology (DBio-So), Laboratory of Structural and Functional Biology (LABEF), Brazil; Post-graduate Program in Biotechnology and Environmental Monitoring (PPGBMA), Center for Science and Technology for Sustainability (CCTS), UFSCar, Sorocaba, SP, Brazil.
While bumblebees may be exposed to microplastics (MPs), the effects on them are not well studied. Therefore, in this research, we assessed the cytotoxicity of pristine and photodegraded spray paint-derived MPs on the midgut, Malpighian tubules, and hepato-nephrocitic system cells of Bombus atratus workers exposed to 50 mg.L MPs for 96 hours.
View Article and Find Full Text PDFDetermining the Exposure Routes and Risk Assessment of Isocyanates in Indoor Environments.
Arch Environ Contam Toxicol
November 2024
Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan.
Isocyanates are used as raw materials for polyurethane foams, paints, and building materials. The isocyanates can cause acute adverse health effects such as irritation of the respiratory tract, skin, and eyes, and induce asthma and sick house syndrome. However, investigations into the potential sources and risk assessments of indoor isocyanates are limited.
View Article and Find Full Text PDFNovel antifouling paint formulation based on CaCrO and CaMnO NPs as a protective pigment.
Sci Rep
October 2024
Department of Chemistry, Faculty of Science, Umm Al-Qura University, Makkah, Saudi Arabia.
This work focused on the preparation of novel antifouling paint based on CaCrO and CaMnO NPs as a safe protective pigment which were replaced with cuprous oxide. Three paint formulations were prepared for comparison, a blank formula without an antifouling agent (F1), a commercial antifouling formula based on 100% cuprous oxide as an antifouling agent (F2), and AF formula based on 75% CaCrO and CaMnO NPs and 25% CuO. The high performance and durability of the paints based on the prepared pigments were evident from their impact resistance, adhesion, pending, hardness, and chemical resistance, which were compared to the blank formula (F1).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!