A Comparative Study of Invasive and Micro-Invasive Analytical Methods for the Detection and Identification of Historically Applied Pesticides to Archival Records in Studies in conservation, Vol.70 N°7-8(2025; October-November) (2025-10-01)

Public ISBD [article]  inStudies in conservation > Vol.70 N°7-8(2025; October-November) (2025-10-01) . - P. 647-658 Titre : A Comparative Study of Invasive and Micro-Invasive Analytical Methods for the Detection and Identification of Historically Applied Pesticides to Archival Records Type de document : texte imprimé Année de publication : 2025 Article en page(s) : P. 647-658 Langues : Anglais (eng) Catégories : Archives -- Conservation et restauration -- Canada Archives -- Conservation et restauration -- Grande-Bretagne Chromatographie en phase gazeuse Conservation et restauration -- Échantillonnage Conservation et restauration -- Méthode comparative Pesticides -- Identification Pesticides -- Recherches Spectrométrie de masse Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : The National Archives UK has previously carried out invasive sampling and analysis on records in its collections which were found to contain various organochlorine pesticide (OCP) residues on all tested items regardless of format or period of creation. This study presented a rare opportunity to carry out comparative research of invasive and swab sampling methods on original, historic materials for the detection and identification of hazardous substances. Swabbing was carried out on the same records that had been invasively sampled to determine the sensitivity and applicability of this method relative to invasive sampling as well as the likelihood of pesticide transfer during handling of the records. Analysis by gas chromatography -mass spectrometry (GC-MS) demonstrated that the presence of a number of pesticides could effectively be identified using a dry swabbing method, including pentachlorophenol, ortho-phenylphenol, and the breakdown products of DDT and methoxychlor. The pesticides identified in invasive and swab testing from the same book were sometimes different, highlighting that the method of sampling will affect the results. Our results from this case study provide a snapshot, comparing the concentrations of hazardous organic pesticides detected in the invasive tests versus those found in swabs, and compare these quantities to human health-based screening concentrations. We argue that a dry swabbing programme is a good option in archival settings for screening for a comprehensive suite of pesticides, complementing existing occupational health approaches that take into account a whole collection, and can provide information to facilitate access and handling of historical records. [article] A Comparative Study of Invasive and Micro-Invasive Analytical Methods for the Detection and Identification of Historically Applied Pesticides to Archival Records [texte imprimé] . - 2025 . - P. 647-658. Langues : Anglais (eng) in Studies in conservation > Vol.70 N°7-8(2025; October-November) (2025-10-01) . - P. 647-658 Catégories : Archives -- Conservation et restauration -- Canada Archives -- Conservation et restauration -- Grande-Bretagne Chromatographie en phase gazeuse Conservation et restauration -- Échantillonnage Conservation et restauration -- Méthode comparative Pesticides -- Identification Pesticides -- Recherches Spectrométrie de masse Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : The National Archives UK has previously carried out invasive sampling and analysis on records in its collections which were found to contain various organochlorine pesticide (OCP) residues on all tested items regardless of format or period of creation. This study presented a rare opportunity to carry out comparative research of invasive and swab sampling methods on original, historic materials for the detection and identification of hazardous substances. Swabbing was carried out on the same records that had been invasively sampled to determine the sensitivity and applicability of this method relative to invasive sampling as well as the likelihood of pesticide transfer during handling of the records. Analysis by gas chromatography -mass spectrometry (GC-MS) demonstrated that the presence of a number of pesticides could effectively be identified using a dry swabbing method, including pentachlorophenol, ortho-phenylphenol, and the breakdown products of DDT and methoxychlor. The pesticides identified in invasive and swab testing from the same book were sometimes different, highlighting that the method of sampling will affect the results. Our results from this case study provide a snapshot, comparing the concentrations of hazardous organic pesticides detected in the invasive tests versus those found in swabs, and compare these quantities to human health-based screening concentrations. We argue that a dry swabbing programme is a good option in archival settings for screening for a comprehensive suite of pesticides, complementing existing occupational health approaches that take into account a whole collection, and can provide information to facilitate access and handling of historical records.

Hazardous Hues : Identification of Arsenic Present in a Range of Colours Found on Historic Archival Material in the Collection of Parks Canada / Timothy Greening in Studies in conservation, Vol.70 N°7-8(2025; October-November) (2025-10-01)  

Public ISBD [article]  inStudies in conservation > Vol.70 N°7-8(2025; October-November) (2025-10-01) . - P. 640-646 Titre : Hazardous Hues : Identification of Arsenic Present in a Range of Colours Found on Historic Archival Material in the Collection of Parks Canada Type de document : texte imprimé Auteurs : Timothy Greening (19..-....), Auteur Année de publication : 2025 Article en page(s) : P. 640-646 Langues : Anglais (eng) Catégories : Archives -- Conservation et restauration -- Canada Arsenic -- Toxicologie Colorants synthétiques -- Toxicologie Pigments -- Identification Pigments -- Toxicologie Spectroscopie de fluorescence Spectroscopie des rayons X Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : Since late 2019, Parks Canada has been active in the identification of hazardous materials in the collection under the care of the Indigenous Affairs and Cultural Heritage Directorate, using non-destructive XRF analysis. This method of analysis can detect elements of concern including lead, mercury, cadmium, and arsenic. In the case of arsenic, selected case studies show that arsenic is found in more places than initially expected. This paper outlines the XRF analysis of collections materials expected to be found in library and archives, and discusses the visual identification of arsenic, based on the colour of the material. Arsenic yellows (orpiment and/or realgar) were not positively identified in this survey, nor was cobalt violet (cobalt arsenate). A copper-arsenic green, likely emerald green, was occasionally detected. In addition, both a green ink distinct from typical arsenical greens, and dark reds were shown to contain varying levels of arsenic on paper artefacts during this survey. This paper posits the use of early synthetic organic pigments as an explanation for the presence of arsenic in the artefacts under investigation. Historical research indicates that aside from the colours green and yellow, arsenic can also be found in materials in the red and mauve colour families, from arsenic used in the synthesis of aniline dyes. En ligne : https://www.tandfonline.com/doi/full/10.1080/00393630.2025.2465954 [article] Hazardous Hues : Identification of Arsenic Present in a Range of Colours Found on Historic Archival Material in the Collection of Parks Canada [texte imprimé] / Timothy Greening (19..-....), Auteur . - 2025 . - P. 640-646. Langues : Anglais (eng) in Studies in conservation > Vol.70 N°7-8(2025; October-November) (2025-10-01) . - P. 640-646 Catégories : Archives -- Conservation et restauration -- Canada Arsenic -- Toxicologie Colorants synthétiques -- Toxicologie Pigments -- Identification Pigments -- Toxicologie Spectroscopie de fluorescence Spectroscopie des rayons X Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : Since late 2019, Parks Canada has been active in the identification of hazardous materials in the collection under the care of the Indigenous Affairs and Cultural Heritage Directorate, using non-destructive XRF analysis. This method of analysis can detect elements of concern including lead, mercury, cadmium, and arsenic. In the case of arsenic, selected case studies show that arsenic is found in more places than initially expected. This paper outlines the XRF analysis of collections materials expected to be found in library and archives, and discusses the visual identification of arsenic, based on the colour of the material. Arsenic yellows (orpiment and/or realgar) were not positively identified in this survey, nor was cobalt violet (cobalt arsenate). A copper-arsenic green, likely emerald green, was occasionally detected. In addition, both a green ink distinct from typical arsenical greens, and dark reds were shown to contain varying levels of arsenic on paper artefacts during this survey. This paper posits the use of early synthetic organic pigments as an explanation for the presence of arsenic in the artefacts under investigation. Historical research indicates that aside from the colours green and yellow, arsenic can also be found in materials in the red and mauve colour families, from arsenic used in the synthesis of aniline dyes. En ligne : https://www.tandfonline.com/doi/full/10.1080/00393630.2025.2465954

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