{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T14:54:39Z","timestamp":1790866479800,"version":"4.1.0"},"reference-count":30,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2004,12,3]],"date-time":"2004-12-03T00:00:00Z","timestamp":1102032000000},"content-version":"vor","delay-in-days":2,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Mass Spectrom."],"published-print":{"date-parts":[[2004,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Pigments are among the most important components of historical paintings and textiles and their nature provides the unique character of color. They can be divided into two main groups: inorganic and organic, extracted from plants or animals. Their identification is a necessary stage in the conservation of art objects. Reversed\u2010phase liquid chromatography with electrospray ionization mass spectrometry (ESI\u2010MS) and UV\/visible spectrophotometric methods were elaborated for the identification of indigoid (indigo, indirubin, isoindigo, isoindirubin) color components of natural dyestuffs and their natural or synthetic precursors (indican, isatin, indoxyl, 2\u2010indolinone). ES\u2010MS offers detection limits in the range 0.03\u20135.00 \u00b5g ml<jats:sup>\u22121<\/jats:sup> for the color compounds examined. The method developed made it possible to identify indigo and its isomers in genuine Indian indigo, indigo from woad and Tyrian Purple. It was applied to the identification of natural dyes on fiber from a 19th century Japanese tapestry, \u2018Cranes in the landscape\u2019. A procedure based on freezing and grinding of a sample before the extraction of dyes from the textile was developed. The components of the extract obtained were identified after acidic hydrolysis as indigotin and methylene blue. Copyright \u00a9 2004 John Wiley &amp; Sons, Ltd.<\/jats:p>","DOI":"10.1002\/jms.728","type":"journal-article","created":{"date-parts":[[2004,12,3]],"date-time":"2004-12-03T06:17:35Z","timestamp":1102054655000},"page":"1441-1449","source":"Crossref","is-referenced-by-count":109,"title":["Identification of indigoid dyes in natural organic pigments used in historical art objects by high\u2010performance liquid chromatography coupled to electrospray ionization mass spectrometry"],"prefix":"10.1002","volume":"39","author":[{"given":"Maria","family":"Puchalska","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kasia","family":"Po\u0142e\u0107\u2010Pawlak","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Irmina","family":"Zadro\u017cna","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Helena","family":"Hryszko","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maciej","family":"Jarosz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2004,12,3]]},"reference":[{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1002\/jssc.200301483"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1179\/sic.1996.41.2.76"},{"key":"e_1_2_6_4_2","doi-asserted-by":"crossref","first-page":"67","DOI":"10.1126\/science.6353574","article-title":"Expression of naphthalene oxidation genes in Escherichia coli results in the biosynthesis of indigo","volume":"222","author":"Ensley BD","year":"1983","journal-title":"Science"},{"key":"e_1_2_6_5_2","volume-title":"Artist's Pigments, a Handbook of Their History and Characteristics","author":"Fitzhugh W","year":"1997"},{"key":"e_1_2_6_6_2","doi-asserted-by":"publisher","DOI":"10.2307\/3180041"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0031-9422(01)00335-1"},{"key":"e_1_2_6_8_2","doi-asserted-by":"crossref","first-page":"1228","DOI":"10.1002\/cber.187801101337","article-title":"Synthese des Isoatins und Indigblaus","volume":"11","author":"Von Baeyer A","year":"1878","journal-title":"Chem. 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