Identification of Paper by Stationary Phase Performance

Autor/inn/en	Smith, Michael J.; Vale, Ilda C.; Gray, Fiona M.
Titel	Identification of Paper by Stationary Phase Performance
Quelle	In: Journal of Chemical Education, 91 (2014) 10, (5 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9584
DOI	10.1021/ed400473g
Schlagwörter	Paper (Material); Science Instruction; Chemistry; Foreign Countries; Science Experiments; College Science; Undergraduate Study; Science Laboratories; Scientific Concepts; Crime; Laboratory Experiments + Suchen Sie Ihr Suchwort? Papier; Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Chemie; Ausland; Grundstudium; Crimes; Delict; Delicts; Delikt; Laboratory work; Laborarbeit
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, yet the essential characteristics of paper 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. The authors' application of this strategy has been successfully extended as it has become evident that the experiment motivates a surprisingly wide range of audiences. (As Provided).
Anmerkungen	Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10