{"id":2988,"date":"2020-12-17T08:57:17","date_gmt":"2020-12-17T07:57:17","guid":{"rendered":"http:\/\/www.e-rihs.it\/?page_id=2988"},"modified":"2024-05-07T11:21:49","modified_gmt":"2024-05-07T10:21:49","slug":"total-reflection-near-ftir-2","status":"publish","type":"page","link":"https:\/\/www.e-rihs.it\/en\/total-reflection-near-ftir-2\/","title":{"rendered":"Total reflection near-FTIR"},"content":{"rendered":"

[et_pb_section fb_built=”1″ _builder_version=”4.7.7″ _module_preset=”default”][et_pb_row column_structure=”2_5,3_5″ _builder_version=”4.7.7″ _module_preset=”default” hover_enabled=”0″ sticky_enabled=”0″][et_pb_column type=”2_5″ _builder_version=”4.7.7″ _module_preset=”default”][et_pb_image src=”http:\/\/www.e-rihs.it\/wp-content\/uploads\/2022\/03\/total-reflection-near-FTIR.jpg” title_text=”total reflection near FTIR” _builder_version=”4.7.7″ _module_preset=”default”][\/et_pb_image][\/et_pb_column][et_pb_column type=”3_5″ _builder_version=”4.7.7″ _module_preset=”default”][et_pb_text _builder_version=”4.7.7″ _module_preset=”default”]<\/p>\n

LABORATORIO: CNR SCITEC<\/strong><\/p>\n

 <\/p>\n

NOME STRUMENTO<\/strong><\/p>\n

Spettrometro portatile JASCO NIR<\/p>\n

 <\/p>\n

INFORMAZIONI GENERALI<\/strong><\/p>\n

La spettroscopia FT-IR in riflessione \u00e8 una spettroscopia vibrazionale ampiamente utilizzata nel campo della scienza per i beni culturali per la caratterizzazione e identificazione dei materiali inorganici ed organici. La misura di specifici segnali relativi a gruppi funzionali molecolari permette il riconoscimento del materiale esaminato. Nella finestra spettrale del vicino infrarosso (NIR) tipicamente cadono bande vibrazionali di combinazione ed armoniche e che avendo dei coefficienti di assorbimento bassi non sono distorte da effetti matrice derivanti dalla modalit\u00e0 di acquisizione in riflessione. La penetrazione della radiazione NIR permette lo studio di superfici pittoriche e degli strati di preparazione anche in presenza di vernici.<\/p>\n

 <\/p>\n

DETTAGLI TECNICI<\/strong><\/p>\n

Lo spettrometro portatile JASCO NIR lavora in riflessione raccogliendo la radiazione riflessa (con un layout ottico di 0\u00b0\/0\u00b0) da una superficie ad una distanza di circa 6mm nella finestra spettrale 12500-4000 cm-1<\/sup>. La strumentazione \u00e8 dotata di una sorgente alogena, di un interferometro di Michelson e un detector InGaAs e di un probe di misura a fibre ottiche in vetro. Il probe di misura \u00e8 costituito da 14 fibre di cui 7 portano la radiazione e le altre sette la raccolgono dalla superficie. La risoluzione spettrale normalmente utilizzata \u00e8 di 4 cm-1<\/sup> e l’area investigata \u00e8 di circa 12 mm2<\/sup>. La strumentazione pu\u00f2\u00a0essere posizionata su un tavolo o anche lasciata a terra sfruttando le fibre ottiche di 2 metri per raggiungere l’oggetto da analizzare.<\/p>\n

 <\/p>\n

Referente:<\/p>\n

Francesca Rosi\u00a0\u00a0francesca.rosi@cnr.it<\/a><\/p>\n

 <\/p>\n

Scarica la scheda completa<\/a><\/p>\n

 <\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

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