Identification of adulterants in artistic earth pigments using a multi-technique approach
The composition of natural earths from Kremer and others bought in different art shops in Lima was studied to determine their authenticity. They were analyzed by Raman Microscopy, X-ray Diffraction, X-ray Fluorescence, and Light reflectance. The results show that Kremer pigments have a natural origi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-01-01
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| Series: | Results in Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211715622002806 |
| _version_ | 1798006270493458432 |
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| author | Cynthia Cáceres-Rivero Ana Luz Tupa-Quispe Ronaldo Torres-Casas Patricia Bedregal |
| author_facet | Cynthia Cáceres-Rivero Ana Luz Tupa-Quispe Ronaldo Torres-Casas Patricia Bedregal |
| author_sort | Cynthia Cáceres-Rivero |
| collection | DOAJ |
| description | The composition of natural earths from Kremer and others bought in different art shops in Lima was studied to determine their authenticity. They were analyzed by Raman Microscopy, X-ray Diffraction, X-ray Fluorescence, and Light reflectance. The results show that Kremer pigments have a natural origin, as they are rich in minerals and clay. By contrast, the pigments bought in Lima are synthetic and contain adulterants. One manufacturer used Cadmium-based pigments for adulteration in Umbers and Siennas, probably to obtain a color similar to the original. A second manufacturer used talc as a filler for adulteration in Sienna and Ochre. The third brand is probably a case of re-packaging construction pigments as art pigments. Manufacturers should label these pigments as Mars instead of Earth pigments, and their actual composition should be known prior to their use. |
| first_indexed | 2024-04-11T12:52:10Z |
| format | Article |
| id | doaj.art-bff85432767a4512b793dca0f8ee8f14 |
| institution | Directory Open Access Journal |
| issn | 2211-7156 |
| language | English |
| last_indexed | 2024-04-11T12:52:10Z |
| publishDate | 2022-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Chemistry |
| spelling | doaj.art-bff85432767a4512b793dca0f8ee8f142022-12-22T04:23:10ZengElsevierResults in Chemistry2211-71562022-01-014100561Identification of adulterants in artistic earth pigments using a multi-technique approachCynthia Cáceres-Rivero0Ana Luz Tupa-Quispe1Ronaldo Torres-Casas2Patricia Bedregal3Dirección de Investigación y Desarrollo, Instituto Peruano de Energía Nuclear, Centro Nuclear Oscar Miró Quesada de la Guerra, Av. José Saco. Km. 13, Carabayllo, Lima, Peru; Corresponding author.Facultad de Ciencias, Universidad Nacional de Ingeniería, Av. Túpac Amaru 210, Rimac. Apartado 1301, Lima, PeruDirección de Investigación y Desarrollo, Instituto Peruano de Energía Nuclear, Centro Nuclear Oscar Miró Quesada de la Guerra, Av. José Saco. Km. 13, Carabayllo, Lima, PeruDirección de Investigación y Desarrollo, Instituto Peruano de Energía Nuclear, Centro Nuclear Oscar Miró Quesada de la Guerra, Av. José Saco. Km. 13, Carabayllo, Lima, PeruThe composition of natural earths from Kremer and others bought in different art shops in Lima was studied to determine their authenticity. They were analyzed by Raman Microscopy, X-ray Diffraction, X-ray Fluorescence, and Light reflectance. The results show that Kremer pigments have a natural origin, as they are rich in minerals and clay. By contrast, the pigments bought in Lima are synthetic and contain adulterants. One manufacturer used Cadmium-based pigments for adulteration in Umbers and Siennas, probably to obtain a color similar to the original. A second manufacturer used talc as a filler for adulteration in Sienna and Ochre. The third brand is probably a case of re-packaging construction pigments as art pigments. Manufacturers should label these pigments as Mars instead of Earth pigments, and their actual composition should be known prior to their use.http://www.sciencedirect.com/science/article/pii/S2211715622002806AdulterationEarth pigmentsIron oxidesRaman spectrometryX-ray spectrometry |
| spellingShingle | Cynthia Cáceres-Rivero Ana Luz Tupa-Quispe Ronaldo Torres-Casas Patricia Bedregal Identification of adulterants in artistic earth pigments using a multi-technique approach Results in Chemistry Adulteration Earth pigments Iron oxides Raman spectrometry X-ray spectrometry |
| title | Identification of adulterants in artistic earth pigments using a multi-technique approach |
| title_full | Identification of adulterants in artistic earth pigments using a multi-technique approach |
| title_fullStr | Identification of adulterants in artistic earth pigments using a multi-technique approach |
| title_full_unstemmed | Identification of adulterants in artistic earth pigments using a multi-technique approach |
| title_short | Identification of adulterants in artistic earth pigments using a multi-technique approach |
| title_sort | identification of adulterants in artistic earth pigments using a multi technique approach |
| topic | Adulteration Earth pigments Iron oxides Raman spectrometry X-ray spectrometry |
| url | http://www.sciencedirect.com/science/article/pii/S2211715622002806 |
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