{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,19]],"date-time":"2026-02-19T08:03:23Z","timestamp":1771488203541,"version":"3.50.1"},"reference-count":44,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2022,12,1]],"date-time":"2022-12-01T00:00:00Z","timestamp":1669852800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100005825","name":"US Department of Agriculture NIFA Award","doi-asserted-by":"publisher","award":["2018-68003-27467"],"award-info":[{"award-number":["2018-68003-27467"]}],"id":[{"id":"10.13039\/100005825","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100005825","name":"US Department of Agriculture NIFA Award","doi-asserted-by":"publisher","award":["DE-SC0014664"],"award-info":[{"award-number":["DE-SC0014664"]}],"id":[{"id":"10.13039\/100005825","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Agricultural Research Service (ARS) Research Participation Program","award":["2018-68003-27467"],"award-info":[{"award-number":["2018-68003-27467"]}]},{"name":"Agricultural Research Service (ARS) Research Participation Program","award":["DE-SC0014664"],"award-info":[{"award-number":["DE-SC0014664"]}]},{"name":"Oak Ridge Institute for Science and Education (ORISE)","award":["2018-68003-27467"],"award-info":[{"award-number":["2018-68003-27467"]}]},{"name":"Oak Ridge Institute for Science and Education (ORISE)","award":["DE-SC0014664"],"award-info":[{"award-number":["DE-SC0014664"]}]},{"DOI":"10.13039\/100000015","name":"U.S. Department of Energy (DOE)","doi-asserted-by":"publisher","award":["2018-68003-27467"],"award-info":[{"award-number":["2018-68003-27467"]}],"id":[{"id":"10.13039\/100000015","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000015","name":"U.S. Department of Energy (DOE)","doi-asserted-by":"publisher","award":["DE-SC0014664"],"award-info":[{"award-number":["DE-SC0014664"]}],"id":[{"id":"10.13039\/100000015","id-type":"DOI","asserted-by":"publisher"}]},{"name":"U.S. Department of Agriculture (USDA)","award":["2018-68003-27467"],"award-info":[{"award-number":["2018-68003-27467"]}]},{"name":"U.S. Department of Agriculture (USDA)","award":["DE-SC0014664"],"award-info":[{"award-number":["DE-SC0014664"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Antibiotics"],"abstract":"<jats:p>Antibiotic distribution and analysis within liquid and solid fractions of manure are highly variable due to each compound\u2019s respective physiochemical properties. This study developed and evaluated a uniform method extracting 10 antibiotics from 4 antibiotic classes (tetracycline, sulfonamides, macrolides, and \u03b2-lactam) from unprocessed manure, solid\u2013liquid separated manure, and composted solids. Through systematic manipulation of previously published liquid chromatography tandem mass spectrometry methods; this study developed an extraction protocol with optimized recovery efficiencies for varied manure substrates. The method includes a two-step, liquid-solid extraction using 10 mL of 0.1 M EDTA-McIlviane buffer followed by 10 mL of methanol. Antibiotics recoveries from unprocessed manure, separated liquids, separated solids, and heat-treated solids using the two-step extraction method had relative standard deviations &lt; 30% for all but ceftiofur. Total antibiotic recoveries were 67\u2013131% for tetracyclines, 56% for sulfonamide, 49\u201353% for macrolides, and 1.3\u201366% for \u03b2-lactams. This is the first study to use one protocol to assess four classes of antibiotics in liquid and solid manure fractions. This study allowed for more precise risk assessment of antibiotic transport in manure waste stream applied to fields as a liquid or solid compost.<\/jats:p>","DOI":"10.3390\/antibiotics11121735","type":"journal-article","created":{"date-parts":[[2022,12,2]],"date-time":"2022-12-02T01:44:46Z","timestamp":1669945486000},"page":"1735","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Quantifying Antibiotic Distribution in Solid and Liquid Fractions of Manure Using a Two-Step, Multi-Residue Antibiotic Extraction"],"prefix":"10.3390","volume":"11","author":[{"given":"Carlton","family":"Poindexter","sequence":"first","affiliation":[{"name":"Department of Environmental Science and Technology, University of Maryland, College Park, MD 20742, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andrea","family":"Yarberry","sequence":"additional","affiliation":[{"name":"Department of Environmental Science and Technology, University of Maryland, College Park, MD 20742, USA"},{"name":"Sustainable Agricultural Systems Lab, U.S. Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Beltsville, MD 20705, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2449-1564","authenticated-orcid":false,"given":"Clifford","family":"Rice","sequence":"additional","affiliation":[{"name":"Sustainable Agricultural Systems Lab, U.S. Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Beltsville, MD 20705, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9169-3823","authenticated-orcid":false,"given":"Stephanie","family":"Lansing","sequence":"additional","affiliation":[{"name":"Department of Environmental Science and Technology, University of Maryland, College Park, MD 20742, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"76","DOI":"10.1016\/j.scp.2018.06.004","article-title":"Occurrence and fate of antibiotics in manure during manure treatments: A short review","volume":"9","author":"Spielmeyer","year":"2018","journal-title":"Sustain. 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