{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,22]],"date-time":"2026-04-22T05:40:07Z","timestamp":1776836407037,"version":"3.51.2"},"reference-count":39,"publisher":"Elsevier BV","license":[{"start":{"date-parts":[[2026,6,1]],"date-time":"2026-06-01T00:00:00Z","timestamp":1780272000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2026,6,1]],"date-time":"2026-06-01T00:00:00Z","timestamp":1780272000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"},{"start":{"date-parts":[[2026,6,1]],"date-time":"2026-06-01T00:00:00Z","timestamp":1780272000000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-017"},{"start":{"date-parts":[[2026,6,1]],"date-time":"2026-06-01T00:00:00Z","timestamp":1780272000000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-037"},{"start":{"date-parts":[[2026,6,1]],"date-time":"2026-06-01T00:00:00Z","timestamp":1780272000000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-012"},{"start":{"date-parts":[[2026,6,1]],"date-time":"2026-06-01T00:00:00Z","timestamp":1780272000000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-029"},{"start":{"date-parts":[[2026,6,1]],"date-time":"2026-06-01T00:00:00Z","timestamp":1780272000000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-004"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["42403031"],"award-info":[{"award-number":["42403031"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["Journal of Chromatography A"],"published-print":{"date-parts":[[2026,6]]},"DOI":"10.1016\/j.chroma.2026.466989","type":"journal-article","created":{"date-parts":[[2026,4,10]],"date-time":"2026-04-10T08:00:32Z","timestamp":1775808032000},"page":"466989","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":0,"special_numbering":"C","title":["A copper substitution approach for the selective analysis of chlorophyll-derived porphyrins in modern geological and environmental samples"],"prefix":"10.1016","volume":"1777","author":[{"given":"Ruochen","family":"Yang","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaowei","family":"Xia","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0004-3452-6008","authenticated-orcid":false,"given":"Junyang","family":"Chen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chen","family":"He","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yahe","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7791-4770","authenticated-orcid":false,"given":"Jianxun","family":"Wu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Quan","family":"Shi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"78","reference":[{"key":"10.1016\/j.chroma.2026.466989_bib0001","doi-asserted-by":"crossref","first-page":"771","DOI":"10.1007\/s10933-009-9367-y","article-title":"Primary production in Lake La Cruz (Spain) over the last four centuries: reconstruction based on sedimentary signal of photosynthetic pigments","volume":"43","author":"Romero-Viana","year":"2010","journal-title":"J. Paleolimnol."},{"key":"10.1016\/j.chroma.2026.466989_bib0002","doi-asserted-by":"crossref","first-page":"209","DOI":"10.1007\/s10452-006-9071-1","article-title":"Reconstruction of historical productivity using visible-near-infrared (VNIR) reflectance properties from boreal and saline lake sediments","volume":"41","author":"Das","year":"2007","journal-title":"Aquat. Ecol."},{"key":"10.1016\/j.chroma.2026.466989_bib0003","doi-asserted-by":"crossref","DOI":"10.1306\/0BDA5AE3-16BD-11D7-8645000102C1865D","article-title":"Preservation of chlorophyll derivatives in sediments off southern California","volume":"42","author":"Orr","year":"1958","journal-title":"AAPG Bull."},{"key":"10.1016\/j.chroma.2026.466989_bib0004","doi-asserted-by":"crossref","first-page":"272","DOI":"10.1016\/0016-7037(60)90034-X","article-title":"Petroleum pigments from recent fresh-water sediments","volume":"19","author":"Hodgson","year":"1960","journal-title":"Geochim. Cosmochim. Acta"},{"key":"10.1016\/j.chroma.2026.466989_bib0005","doi-asserted-by":"crossref","first-page":"767","DOI":"10.1105\/tpc.108.064089","article-title":"Pheophytin pheophorbide hydrolase (Pheophytinase) is involved in chlorophyll breakdown during leaf senescence in Arabidopsis","volume":"21","author":"Schelbert","year":"2009","journal-title":"Plant Cell"},{"key":"10.1016\/j.chroma.2026.466989_bib0006","doi-asserted-by":"crossref","first-page":"243","DOI":"10.1007\/s10933-020-00135-z","article-title":"Quantification of chlorophyll a, chlorophyll b and pheopigments a in lake sediments through deconvolution of bulk UV\u2013VIS absorption spectra","volume":"64","author":"Sanchini","year":"2020","journal-title":"J. Paleolimnol."},{"key":"10.1016\/j.chroma.2026.466989_bib0007","doi-asserted-by":"crossref","first-page":"943","DOI":"10.1016\/j.foodchem.2017.11.079","article-title":"Synthesis, characterization, and functional properties of chlorophylls, pheophytins, and zn-pheophytins","volume":"245","author":"Kang","year":"2018","journal-title":"Food Chem."},{"key":"10.1016\/j.chroma.2026.466989_bib0008","doi-asserted-by":"crossref","first-page":"389","DOI":"10.1016\/0016-7037(91)90426-6","article-title":"Vanadyl 3-nor C30DPEP: indicator of depositional environment of a lacustrine sediment","volume":"55","author":"Sundararaman","year":"1991","journal-title":"Geochim. Cosmochim. Acta"},{"key":"10.1016\/j.chroma.2026.466989_bib0009","doi-asserted-by":"crossref","DOI":"10.1016\/j.dib.2020.105548","article-title":"High resolution mass spectral data from the analysis of copper chlorophylls and copper chlorophyll degradation products in bright green table olives","volume":"30","author":"Scholl","year":"2020","journal-title":"Data Brief"},{"key":"10.1016\/j.chroma.2026.466989_bib0010","doi-asserted-by":"crossref","DOI":"10.1016\/j.foodchem.2023.137728","article-title":"Absolute chlorophyll composition of commercial green food colorants and coloring foodstuff by HPLC-ESI-QTOF-MS\/MS: copper chlorophyllins","volume":"436","author":"Roca","year":"2024","journal-title":"Food Chem."},{"key":"10.1016\/j.chroma.2026.466989_bib0011","doi-asserted-by":"crossref","first-page":"81","DOI":"10.1016\/j.chemgeo.2016.08.005","article-title":"Simultaneous quantitative analysis of Ni, VO, Cu, Zn and Mn geoporphyrins by liquid chromatography-high resolution multistage mass spectrometry: method development and validation","volume":"441","author":"Woltering","year":"2016","journal-title":"Chem. Geol."},{"key":"10.1016\/j.chroma.2026.466989_bib0012","doi-asserted-by":"crossref","first-page":"2153","DOI":"10.1002\/rcm.3600","article-title":"Observation of vanadyl porphyrins and sulfur-containing vanadyl porphyrins in a petroleum asphaltene by atmospheric pressure photonionization fourier transform ion cyclotron resonance mass spectrometry","volume":"22","author":"Qian","year":"2008","journal-title":"Rapid Commun. Mass Spectrom."},{"key":"10.1016\/j.chroma.2026.466989_bib0013","doi-asserted-by":"crossref","first-page":"10382","DOI":"10.1021\/acs.energyfuels.8b01728","article-title":"Simultaneous detection of vanadyl, nickel, iron, and gallium porphyrins in marine shales from the eagle ford formation, south texas","volume":"32","author":"Zheng","year":"2018","journal-title":"Energy Fuels"},{"key":"10.1016\/j.chroma.2026.466989_bib0014","doi-asserted-by":"crossref","first-page":"232","DOI":"10.1007\/s10553-013-0435-7","article-title":"Comparative analysis of extractive methods of porphyrin separation from heavy oil asphatenes","volume":"49","author":"Milordov","year":"2013","journal-title":"Chem. Technol. Fuels Oils"},{"key":"10.1016\/j.chroma.2026.466989_bib0015","doi-asserted-by":"crossref","first-page":"868","DOI":"10.3390\/molecules29040868","article-title":"Matrix selection strategies for MALDI-TOF MS\/MS characterization of cyclic tetrapyrroles in blood and food samples","volume":"29","author":"Bianco","year":"2024","journal-title":"Molecules"},{"key":"10.1016\/j.chroma.2026.466989_bib0016","doi-asserted-by":"crossref","first-page":"1053","DOI":"10.1002\/cjoc.202200032","article-title":"Radical SAM-dependent demetallation of heme","volume":"40","author":"Cheng","year":"2022","journal-title":"Chin. J. Chem."},{"key":"10.1016\/j.chroma.2026.466989_bib0017","doi-asserted-by":"crossref","DOI":"10.1016\/j.jclepro.2022.133701","article-title":"Preparation of green-protected bamboo with excellent color fastness using natural sodium copper chlorophyll","volume":"371","author":"Qin","year":"2022","journal-title":"J. Clean. Prod."},{"key":"10.1016\/j.chroma.2026.466989_bib0018","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1080\/10408399009527511","article-title":"Chlorophylls in foods","volume":"29","author":"Schwartz","year":"1990","journal-title":"Crit. Rev. Food Sci. Nutr."},{"key":"10.1016\/j.chroma.2026.466989_bib0019","doi-asserted-by":"crossref","first-page":"1263","DOI":"10.1016\/0022-1902(72)80327-0","article-title":"Kinetics of formation and displacement of metalloporphyrin in aqueous solutions","volume":"34","author":"Das","year":"1972","journal-title":"J. Inorg. Nucl. Chem."},{"key":"10.1016\/j.chroma.2026.466989_bib0020","doi-asserted-by":"crossref","DOI":"10.1016\/j.foodres.2020.109484","article-title":"Development of an accurate and direct method for the green food colorants detection","volume":"136","author":"P\u00e9rez-G\u00e1lvez","year":"2020","journal-title":"Food Res. Int."},{"key":"10.1016\/j.chroma.2026.466989_bib0021","doi-asserted-by":"crossref","first-page":"18104","DOI":"10.1021\/acs.energyfuels.1c02091","article-title":"Applications of high performance liquid chromatography in the petroleomic analysis of crude oil: a mini-review","volume":"35","author":"Heshka","year":"2021","journal-title":"Energy Fuels"},{"key":"10.1016\/j.chroma.2026.466989_bib0022","doi-asserted-by":"crossref","DOI":"10.1016\/j.orggeochem.2022.104368","article-title":"An optimized accelerated solvent extraction and purification method for enhanced recovery of n-alkanes (notably short-chains) from environmental samples using the conventional dichloromethane\/methanol solvent","volume":"165","author":"Ram","year":"2022","journal-title":"Org. Geochem."},{"key":"10.1016\/j.chroma.2026.466989_bib0023","unstructured":"United States Environment Protection Agency, SW-846 test method 3540C: soxhlet extraction. https:\/\/www.epa.gov\/hw-sw846\/sw-846-test-method-3540c-soxhlet-extraction, 2025 (accessed March 28, 2026)."},{"key":"10.1016\/j.chroma.2026.466989_bib0024","doi-asserted-by":"crossref","first-page":"79","DOI":"10.1007\/s10967-019-06454-4","article-title":"Synthesis, characterization and evaluation of a Cu-labeled macrocyclic-porphyrin as a potential chelator for 64Cu-based radiopharmaceuticals","volume":"320","author":"Aguilar-Ortiz","year":"2019","journal-title":"J. Radioanal. Nucl. Chem."},{"key":"10.1016\/j.chroma.2026.466989_bib0025","doi-asserted-by":"crossref","first-page":"5519","DOI":"10.1021\/ic980420d","volume":"37","author":"Inada","year":"1998","journal-title":"Inorg. Chem."},{"key":"10.1016\/j.chroma.2026.466989_bib0026","doi-asserted-by":"crossref","first-page":"420","DOI":"10.1111\/j.1749-6632.1973.tb43227.x","article-title":"Kinetic studies on metal chelation by porphyrins","volume":"206","author":"Longo","year":"1973","journal-title":"Ann. N. Y. Acad. Sci."},{"key":"10.1016\/j.chroma.2026.466989_bib0027","doi-asserted-by":"crossref","first-page":"349","DOI":"10.1016\/0016-7037(82)90226-5","article-title":"Stability of metalloporphyrins adsorbed on clays: a comparative study","volume":"46","author":"Bergaya","year":"1982","journal-title":"Geochim. Cosmochim. Acta"},{"key":"10.1016\/j.chroma.2026.466989_bib0028","doi-asserted-by":"crossref","first-page":"49","DOI":"10.1126\/science.201.4350.49","article-title":"Copper porphyrins in deep-sea sediments: a possible indicator of oxidized terrestrial organic matter","volume":"201","author":"Palmer","year":"1978","journal-title":"Science"},{"key":"10.1016\/j.chroma.2026.466989_bib0029","doi-asserted-by":"crossref","first-page":"57","DOI":"10.1016\/j.foodres.2018.03.022","article-title":"Pigment changes during preservation of green table olive specialities treated with alkali and without fermentation: effect of thermal treatments and storage conditions","volume":"108","author":"Gandul-Rojas","year":"2018","journal-title":"Food Res. Int."},{"key":"10.1016\/j.chroma.2026.466989_bib0030","doi-asserted-by":"crossref","DOI":"10.1016\/j.chroma.2020.461008","article-title":"Quantitation of copper chlorophylls in green table olives by ultra-high-performance liquid chromatography with inductively coupled plasma isotope dilution mass spectrometry","volume":"1620","author":"Harp","year":"2020","journal-title":"J. Chromatogr. A"},{"key":"10.1016\/j.chroma.2026.466989_bib0031","doi-asserted-by":"crossref","first-page":"307","DOI":"10.1007\/s11427-016-0057-9","article-title":"Function of terahertz spectra in monitoring the decomposing process of biological macromolecules and in investigating the causes of photoinhibition","volume":"60","author":"Qu","year":"2017","journal-title":"Sci. China Life Sci."},{"key":"10.1016\/j.chroma.2026.466989_bib0032","doi-asserted-by":"crossref","first-page":"1415","DOI":"10.5194\/bg-15-1415-2018","article-title":"Revisiting chlorophyll extraction methods in biological soil crusts \u2013 methodology for determination of chlorophyll a and chlorophyll a + b as compared to previous methods","volume":"15","author":"Caesar","year":"2018","journal-title":"Biogeosciences"},{"key":"10.1016\/j.chroma.2026.466989_bib0033","doi-asserted-by":"crossref","first-page":"255","DOI":"10.1111\/j.1469-8137.1987.tb00181.x","article-title":"The degradation of chlorophyll \u2014 A biological enigma","volume":"107","author":"Hendry","year":"1987","journal-title":"New Phytol."},{"key":"10.1016\/j.chroma.2026.466989_bib0034","doi-asserted-by":"crossref","first-page":"139","DOI":"10.1093\/pcp\/pcae093","article-title":"Chlorophyll degradation and its physiological function","volume":"66","author":"Tanaka","year":"2025","journal-title":"Plant Cell Physiol."},{"key":"10.1016\/j.chroma.2026.466989_bib0035","doi-asserted-by":"crossref","first-page":"271","DOI":"10.1016\/S0022-0981(99)00010-6","article-title":"Comparison of the photodegradation rates of chlorophyll chlorin ring and phytol side chain in phytodetritus: is the phytyldiol versus phytol ratio (CPPI) a new biogeochemical index?","volume":"237","author":"Cuny","year":"1999","journal-title":"J. Exp. Mar. Biol. Ecol."},{"key":"10.1016\/j.chroma.2026.466989_bib0036","doi-asserted-by":"crossref","first-page":"700","DOI":"10.1105\/tpc.109.210313","article-title":"A new chlorophyll degradation pathway","volume":"21","author":"Eckardt","year":"2009","journal-title":"Plant Cell"},{"key":"10.1016\/j.chroma.2026.466989_bib0037","unstructured":"United States Environment Protection Agency, SW-846 test method 3660B: sulfur cleanup. https:\/\/www.epa.gov\/hw-sw846\/sw-846-test-method-3660b-sulfur-cleanup, 2015 (accessed March 28, 2026)."},{"key":"10.1016\/j.chroma.2026.466989_bib0038","doi-asserted-by":"crossref","first-page":"773","DOI":"10.2298\/HEMIND121107002K","article-title":"Comparative study of binding strengths of heavy metals with humic acid","volume":"67","author":"Kosti\u0107","year":"2013","journal-title":"Hem. Ind."},{"key":"10.1016\/j.chroma.2026.466989_bib0039","doi-asserted-by":"crossref","first-page":"235","DOI":"10.1142\/S1088424612004550","article-title":"Direct measurement of equilibrium constants for water-soluble porphyrin with copper(II) and cobalt(II) by differential pulse anodic stripping voltammetry (DPASV)","volume":"16","author":"Kutubi","year":"2012","journal-title":"J. Porphyr. Phthalocyanines"}],"container-title":["Journal of Chromatography A"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0021967326003195?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0021967326003195?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2026,4,22]],"date-time":"2026-04-22T04:44:43Z","timestamp":1776833083000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0021967326003195"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,6]]},"references-count":39,"alternative-id":["S0021967326003195"],"URL":"https:\/\/doi.org\/10.1016\/j.chroma.2026.466989","relation":{},"ISSN":["0021-9673"],"issn-type":[{"value":"0021-9673","type":"print"}],"subject":[],"published":{"date-parts":[[2026,6]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"A copper substitution approach for the selective analysis of chlorophyll-derived porphyrins in modern geological and environmental samples","name":"articletitle","label":"Article Title"},{"value":"Journal of Chromatography A","name":"journaltitle","label":"Journal Title"},{"value":"https:\/\/doi.org\/10.1016\/j.chroma.2026.466989","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"\u00a9 2026 Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.","name":"copyright","label":"Copyright"}],"article-number":"466989"}}