| fullrecord |
[{"key": "dc.contributor.advisor", "value": "Vehni\u00e4inen, Eeva-Riikka", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Asikainen, Harri", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2023-05-03T04:38:43Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2023-05-03T04:38:43Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2020", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/86726", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Perinteisesti polysyklisi\u00e4 aromaattisia hiilivetyj\u00e4 (PAH) on m\u00e4\u00e4ritetty kromatografisilla menetelmill\u00e4. Niiden huonoina puolina ovat muun muassa n\u00e4ytteiden vaatima runsas esik\u00e4sittely, analyysiajojen hitaus, operaattoreilta vaadittava korkea tietotaito, laitteistojen korkea hinta ja tarvittavien orgaanisten liuottimien suuri m\u00e4\u00e4r\u00e4. Synkronoitu fluoresenssispektroskopia (SFS) on nopea, helposti operoitava ja v\u00e4h\u00e4n n\u00e4ytteiden esik\u00e4sittely\u00e4 vaativa menetelm\u00e4, joka lis\u00e4ksi tarjoaa perinteist\u00e4 fluoresenssispektroskopiaa yksinkertaisemmat spektrit. T\u00e4ss\u00e4 tutkielmassa selvitettiin synkronoidun fluoresenssispektroskopian soveltuvuutta fluoranteenin ja bentso(k)fluoranteenin m\u00e4\u00e4ritt\u00e4miseen vesi-etanolitaustaisista n\u00e4ytteist\u00e4 k\u00e4ytt\u00e4m\u00e4ll\u00e4 niille kirjallisuudesta l\u00f6ytyneit\u00e4 mittausparametrej\u00e4. Seoksena vesi ja etanoli muodostavat fluoresoivan klusterin, vaikka yksin ne eiv\u00e4t ole fluoresoivia yhdisteit\u00e4. Vesi-etanolin klusteri emittoi osittain samalla aallonpituudella fluoranteenin kanssa ja nostaa taustaemission niin korkeaksi, ett\u00e4 fluoranteenin osalta ei pystyt\u00e4 m\u00e4\u00e4ritt\u00e4m\u00e4\u00e4n niin alhaisia pitoisuuksia kuin SFS muuten mahdollistaisi. Bentso(k)fluoranteenin kohdalla taustaemissio j\u00e4i pieneksi ja vaikutus bentso(k)fluoranteenin m\u00e4\u00e4ritett\u00e4vyyteen j\u00e4i v\u00e4h\u00e4iseksi. SFS soveltuu hyvin bentso(k)fluoranteenin m\u00e4\u00e4ritt\u00e4miseen vesi-etanolitaustaisista n\u00e4ytteist\u00e4, mutta fluoranteenin kohdalla vesi-etanolin voimakas taustaemissio aiheuttaa ongelmia.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Traditionally, polycyclic aromatic hydrocarbons (PAHs) are determined by chromatographic methods. Their disadvantages include the extensive pre- treatment required by the samples, the slowness of the analysis runs, the high level of know-how required of operators, the high cost of equipment and the large amounts of organic solvents required. Synchronous fluorescence spectroscopy (SFS) is a fast, easy-to-operate and low-sample-pre-treatment method, which also provides simpler spectra than traditional fluorescence spectroscopy. This thesis examined the applicability of synchronous fluorescence spectroscopy for the determination of fluoranthene and benzo(k)fluoranthene in samples with water-ethanol backgrounds by using measurement parameters found in the literature. As a mixture, water and ethanol form a fluorescent cluster, although alone they are not fluorescent compounds. The water-ethanol cluster partially emits at the same wavelength as fluoranthene and raises the background emission to such a high level that the fluoranthene cannot be determined at concentrations as low as SFS would otherwise allow. For benzo(k)fluoranthene, background emission was low and the effect on the determinability of benzo(k)fluoranthene was limited. SFS is well suited for the determination of benzo(k)fluoranthene from samples with a water-ethanol background, but in the case of fluoranthene, a strong background emission of water-ethanol causes problems.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Miia Hakanen (mihakane@jyu.fi) on 2023-05-03T04:38:43Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2023-05-03T04:38:43Z (GMT). No. of bitstreams: 0\n Previous issue date: 2020", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "26", "language": "", "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.title", "value": "Synkronoidun fluoresenssispektroskopian optimointi vesi-etanolitaustaisille fluoranteeni- ja bentso(k)fluoranteenin\u00e4ytteille", "language": "", "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "bachelor thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-202305032821", "language": "", "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Bachelor's thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Kandidaatinty\u00f6", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Bio- ja ymp\u00e4rist\u00f6tieteiden laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Biological and Environmental Science", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Ymp\u00e4rist\u00f6tiede", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Environmental science", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_7a1f", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "bachelorThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "40151", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "analyysi", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "fluoresenssi", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "PAH-yhdisteet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}]
|