Identification of treated Baltic amber by FTIR and FT-Raman – A feasibility study

Amber extract as a bio‐additive to poly(lactic acid) films: Multimethod analysis of crystallinity and stability

“…It is worth remembering that the amber extract used in this work comes from the residue produced from the processing of Baltic amber for jewelry manufacturing. Therefore, the infrared bands for this sample agreed with the data published by Drąg et al 33 on the distortion and displacement of the bands when comparing processed amber to natural amber. Pastorelli et al 35 concluded that such a significant shift and splitting of original carbonyl groups were associated with the hydrolysis of succinate ester into communol and succinic acid.…”

“…In the literature, this set of signals is known as the Baltic shoulder and is considered the “fingerprint” of succinic acid and its esters. It differentiates Baltic amber from other fossilized resins 1,33,34 . The carbonyl group signal appeared in the range from 1822 to 1534 cm −1 .…”

Fe3N-decorated porous carbon frameworks from wheat flour with dual enzyme-mimicking activities for organic pollutant degradation

“…47,48 The former band at 1648 cm −1 is significantly intensified for samples F/M and F/M-Fe, partly because of the introduction of melamine that can induce more production of amide, on the other hand, the stretching mode of CvC may also share the same peak position. 49,50 For F, the absorption peak at 1746 cm −1 corresponds to the vibration of CvO stretching, which may originate from the esters and is associated with lipids and fatty acids. 51 In the X-ray photoelectron spectroscopy (XPS) measurement aiming at disclosing the chemical composition of F/M-Fe, four prominent peaks at 284.4 eV, 284.9 eV, 286.2 eV, and 288.5 eV in the high-resolution C 1s spectrum can be observed, corresponding to sp 2 C, sp 3 C, C-N/C-O, and CvO, respectively (Fig.…”

Determination of Anthracene Derivatives in Baltic Amber Using SERS

“…Over the last decades, a large number of studies have been carried out on fossil resins, determining their age, analyzing inclusions in natural resin [ 1 , 2 , 3 , 4 , 5 ], determining the geographical and geological deposits [ 6 , 7 ], distinguishing real natural resins from fakes [ 8 ], and distinguishing different varieties [ 9 , 10 , 11 , 12 , 13 , 14 ]. To date, more than a hundred different fossil resins have been described [ 15 ].…”