{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,17]],"date-time":"2026-07-17T00:51:25Z","timestamp":1784249485881,"version":"3.55.0"},"reference-count":33,"publisher":"Wiley","issue":"15","license":[{"start":{"date-parts":[[2008,7,29]],"date-time":"2008-07-29T00:00:00Z","timestamp":1217289600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J of Separation Science"],"published-print":{"date-parts":[[2008,8]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>A new method, involving SPE and HPLC\/UV diode\u2010array detection (DAD), was developed for the quantification of colophonium components in different consumer products, such as cosmetics. Colophonium is a common cause of contact dermatitis since its components can oxidize into allergens on exposure to air. Three different resin acids were used as markers for native and oxidized colophonium, abietic acid (AbA), dehydroabietic acid (DeA), and 7\u2010oxodehydroabietic acid (7\u2010<jats:italic>O<\/jats:italic>\u2010DeA). The SPE method, utilizing a mixed\u2010mode hydrophobic and anion exchange retention mechanism, was shown to yield very clean extracts. The use of a urea\u2010embedded C<jats:sub>12<\/jats:sub> HPLC stationary phase improved the separation of the resin acids compared to common C<jats:sub>18<\/jats:sub>. Concentrations higher than 2 mg\/g of both AbA and DeA were detected in wax strips. In this product also 7\u2010<jats:italic>O<\/jats:italic>\u2010DeA, a marker for oxidized colophonium, was detected at a level of 28 \u03bcg\/g. The LODs were in the range of 7\u201319 \u03bcg\/g and the LOQs 22\u201356 \u03bcg\/g. The method is simple to use and can be applied on many types of technical products, not only cosmetics. For the first time, a method for technical products was developed, which separates AbA from pimaric acid.<\/jats:p>","DOI":"10.1002\/jssc.200800210","type":"journal-article","created":{"date-parts":[[2008,7,29]],"date-time":"2008-07-29T08:57:28Z","timestamp":1217321848000},"page":"2784-2790","source":"Crossref","is-referenced-by-count":24,"title":["SPE and HPLC\/UV of resin acids in colophonium\u2010containing products"],"prefix":"10.1002","volume":"31","author":[{"given":"Ulrika","family":"Nilsson","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Naghmeh","family":"Berglund","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fredrik","family":"Lindahl","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sara","family":"Axelsson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Theres","family":"Redeby","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pia","family":"Lassen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ann\u2010Therese","family":"Karlberg","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2008,8,19]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"crossref","unstructured":"Karlberg A.\u2010T. 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