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Identification of Paper by Stationary Phase Performance
- Source :
- Repositório Científico de Acesso Aberto de Portugal, Repositório Científico de Acesso Aberto de Portugal (RCAAP), instacron:RCAAP
- Publication Year :
- 2014
- Publisher :
- American Chemical Society (ACS), 2014.
-
Abstract
- Paper is an extraordinary example of a composite engineering material with practical use in a huge variety of applications. Since its invention in China there have been many alterations to manufacturing techniques, component formulation and surface finishing, but the essential characteristics of the product have not changed greatly. The objective of this experiment is to demonstrate that the chromatographic performance of paper as a stationary phase may be used to distinguish between externally-similar materials. The procedure developed is so simple that even students with little exposure to practical chemistry and limited chemical knowledge can understand the essential content. Because of the ubiquitous nature of paper, it is often recovered from crime scenes as evidence for analysis. However, the variety of sources and the mechanical or chemical properties often make demonstration of unequivocal correlation between “questioned” and “known” or “reference” samples a complex task. Introducing the practical session as a crime scene investigation, and presenting the laboratory exercise as an accessible forensic technique for paper identification, adds an exciting dimension to the practical experience for young people.<br />Centro de Química (FEDER-COMPETE/QREN/EU and PEst C/QUI/U1686/2013, Fundação para a Ciência e Tecnologia).
- Subjects :
- Laboratory Instruction
Ciências Químicas [Ciências Naturais]
Social Sciences
Forensic Chemistry
Analytical Chemistry
Education
Task (project management)
Component (UML)
High School/Introductory Chemistry
Crime scene
First-Year Undergraduate/General
Simple (philosophy)
040101 forestry
Science instruction
Science & Technology
Chemistry
05 social sciences
050301 education
Hands-On Learning/Manipulatives
04 agricultural and veterinary sciences
General Chemistry
16. Peace & justice
Ciências Naturais::Ciências Químicas
Variety (cybernetics)
Identification (information)
Chemical engineering
Stationary phase
0401 agriculture, forestry, and fisheries
Biochemical engineering
0503 education
Subjects
Details
- ISSN :
- 19381328 and 00219584
- Volume :
- 91
- Database :
- OpenAIRE
- Journal :
- Journal of Chemical Education
- Accession number :
- edsair.doi.dedup.....1933147ad5e2de6350e6a37b9388b141