Analysis and differentiation of paper samples by capillary electrophoresis and multivariate analysis
This work reports an investigation for the analysis of different paper samples using CEwith laser-induced detection. Papers from four different manufactures (white-copy paper)and four different paper sources (white and recycled-copy papers, adhesive yellow papernotes and restaurant serviettes) were...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Universidad de Alcalá (UAH) |
| Repositorio: | e_Buah Biblioteca Digital Universidad de Alcalá |
| Idioma: | inglés |
| OAI Identifier: | oai:ebuah.uah.es:10017/60467 |
| Acceso en línea: | http://hdl.handle.net/10017/60467 https://dx.doi.org/10.1002/elps.201300603 |
| Access Level: | acceso abierto |
| Palabra clave: | Capillary electrophoresis Cellulosic samples Fluorescent labeling Forensic Analysis Principal component analysis Químcia Chemistry |
| Sumario: | This work reports an investigation for the analysis of different paper samples using CEwith laser-induced detection. Papers from four different manufactures (white-copy paper)and four different paper sources (white and recycled-copy papers, adhesive yellow papernotes and restaurant serviettes) were pulverized by scratching with a surgical scalpel priorto their derivatization with a fluorescent labeling agent, 8-aminopyrene-1,3,6-trisulfonicacid. Methodological conditions were evaluated, specifically the derivatization conditionswith the aim to achieve the best S/N signals and the separation conditions in order toobtain optimum values of sensitivity and reproducibility. The best conditions, in termsof fastest, and easiest sample preparation procedure, minimal sample consumption, aswell as the use of the simplest and fastest CE-procedure for obtaining the best analyticalparameters, were applied to the analysis of the different paper samples. The registeredelectropherograms were pretreated (normalized and aligned) and subjected to multivari-ate analysis (principal component analysis). A successful discrimination among papersamples without entanglements was achieved. To the best of our knowledge, this workpresents the first approach to achieve a successful differentiation among visually similarwhite-copy paper samples produced by different manufactures and paper from differentpaper sources through their direct analysis by CE-LIF and subsequent comparative studyof the complete cellulose electropherogram by chemometric tools. |
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