HECOL476 Lecture Notes - Lecture 14: Electromagnetic Spectrum, Microanalysis, Conservation And Restoration Of Textiles

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Some techniques best for inorganic (metals, salts) or organics (c, h, o, n) Detection limit: varying degrees of noise inhibit identi cation. Each method has di erent e ects on the sample/artifact. Sometimes what will be learned is not worth risk of ruining the textile. Non-destructive = sample not damaged - no sampling necessary (bulk object) Often >1 technique used to answer a speci c question. Visual result (e. g. staining tests -chemical turns a certain colour) Emphasis on surface or interior: elemental (whole atoms, ions) Techniques characterize atoms or groups of atoms by atomic mass or time of. Di erent methods of getting ions o the surface. Alternatively nucleus is excited and emits excess energy when returning to a less exited state. Identi cation through reference spectra of known materials: spectrometric (electronic structures of atoms) Material irradiated with some part of electromagnetic spectrum.

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