{"id":34739,"date":"2024-01-11T15:08:14","date_gmt":"2024-01-11T14:08:14","guid":{"rendered":"https:\/\/karmaka.de\/?p=34739"},"modified":"2024-01-11T15:26:35","modified_gmt":"2024-01-11T14:26:35","slug":"analytical-method-for-stable-background-reduction-for-raman-spectra-of-carbon-containing-meteorite-and-terrestrial-samples-suffering-from-intense-fluorescence","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=34739","title":{"rendered":"Analytical method for stable background reduction for Raman spectra of carbon-containing meteorite and terrestrial samples suffering from intense fluorescence<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Aruto Kashima, Shu-hei Urashima, Hiroharu Yui<\/p>\n\n\n\n<p>MAPS, Version of Record online: 10 January 2024<\/p>\n\n\n\n<p><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/maps.14123\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/epdf\/10.1111\/maps.14123\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Chemical states of carbon in terrestrial (meta) sediments and carbonaceous chondrites gather attention as a geothermometer. As a nondestructive analytical method, Raman spectroscopy has been widely used to study their electronic properties, crystallinity, and structural defects through so-called D and G bands. For the analysis of Raman spectra, a common problem is coexistence of a fluorescence background, which should be subtracted prior to the peak-fitting analysis. However, we recently faced a problem that the band shape noticeably changed depending on the background function assumed although the background seemed to be well subtracted at a first glance regardless of the choice of the background function. For the application of the Raman spectroscopy as a geothermometer, a standard background subtraction method must be established to suppress the arbitrariness. In the present study, Raman spectra of seven carbon-containing natural samples, whose background intensities were significantly different, were measured, and their background shape was evaluated by first-, second-, and third-order polynomials. The results indicated that the third-order polynomial was necessary and sufficient as a standard background function. Importantly, although lower order polynomials seem to successfully fit the background at a first glance, they falsely caused dispersion of the shoulder band shape.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aruto Kashima, Shu-hei Urashima, Hiroharu Yui MAPS, Version of Record online: 10 January 2024 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;Chemical states of carbon in terrestrial (meta) sediments and carbonaceous chondrites gather attention as a geothermometer&#8230;.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1598,9,10,18,14],"tags":[4965,108,3631,3273,1809,105,1812,5763,734,107,6590,110,264],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/34739"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=34739"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/34739\/revisions"}],"predecessor-version":[{"id":34740,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/34739\/revisions\/34740"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=34739"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=34739"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=34739"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}