{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,26]],"date-time":"2025-10-26T14:02:52Z","timestamp":1761487372482,"version":"build-2065373602"},"reference-count":32,"publisher":"Wiley","issue":"14","license":[{"start":{"date-parts":[[2026,4,21]],"date-time":"2026-04-21T00:00:00Z","timestamp":1776729600000},"content-version":"am","delay-in-days":365,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#am"},{"start":{"date-parts":[[2025,4,21]],"date-time":"2025-04-21T00:00:00Z","timestamp":1745193600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100000001","name":"National Science Foundation","doi-asserted-by":"publisher","award":["EAR 1804838","EAR 1836868"],"award-info":[{"award-number":["EAR 1804838","EAR 1836868"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["analyticalsciencejournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Rapid Comm Mass Spectrometry"],"published-print":{"date-parts":[[2025,7,30]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Rationale<\/jats:title>\n                    <jats:p>Applications of high\u2010precision isotope analysis of ecohydrological water samples such as soil and plant waters with infrared (IR) laser spectrometry have been hampered by spectral interferences of volatile organic compounds.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      In this study, three methods were tested to remove methanol (MeOH) and\/or ethanol (EtOH) added to water for \u03b4\n                      <jats:sup>2<\/jats:sup>\n                      H, \u03b4\n                      <jats:sup>18<\/jats:sup>\n                      O, and\n                      <jats:sup>17<\/jats:sup>\n                      O\u2010excess analysis with Picarro L2140\u2010i: microcombustion module (MCM), pre\u2010treatment with solid\u2010phase extraction (SPE), and pre\u2010treatment with simple MeOH\/EtOH combustion (SMEC) method.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The Picarro MCM was not able to combust the alcohols of high concentrations. Hydrophilic\u2013lipophilic balanced (HLB) SPE could adsorb MeOH\/EtOH at low concentrations (e.g., 0.1% EtOH). However, its adsorption capacity could be readily exhausted, and adsorbed water on the SPE adsorbents co\u2010elutes and mix with a sample water. The SMEC can successfully combust highly concentrated waters (0.5% MeOH and 1% EtOH) at 450\u2013500\u2009\u00b0C, but the alcohol combustion and oxygen isotope exchange with added O\n                      <jats:sub>2<\/jats:sub>\n                      could significantly increase \u03b4\n                      <jats:sup>18<\/jats:sup>\n                      O values (up to 6\u20137\u2030) and decrease\n                      <jats:sup>17<\/jats:sup>\n                      O\u2010excess (up to 110 per meg) in the presence of a catalyst. The combination of post\u2010analysis corrections of Picarro MCM data (\u03b4\n                      <jats:sup>2<\/jats:sup>\n                      H and \u03b4\n                      <jats:sup>18<\/jats:sup>\n                      O) and pre\u2010treatment with SMEC method (\u03b4\n                      <jats:sup>2<\/jats:sup>\n                      H and\n                      <jats:sup>17<\/jats:sup>\n                      O\u2010excess) can reach the accuracy and precision of \u22643 and \u22642 \u2030 (\u03b4\n                      <jats:sup>2<\/jats:sup>\n                      H), \u22640.2 and \u22640.3\u2030 (\u03b4\n                      <jats:sup>18<\/jats:sup>\n                      O), and \u226420 and \u226447 per meg (\n                      <jats:sup>17<\/jats:sup>\n                      O\u2010excess), respectively.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>\n                      A strategy of combining the two methods is proposed for high\u2010precision isotope analysis of organic contaminated samples: post\u2010analysis corrections of Picarro MCM data (\u03b4\n                      <jats:sup>2<\/jats:sup>\n                      H and \u03b4\n                      <jats:sup>18<\/jats:sup>\n                      O) and pre\u2010treatment with SMEC method (\u03b4\n                      <jats:sup>2<\/jats:sup>\n                      H and\n                      <jats:sup>17<\/jats:sup>\n                      O\u2010excess). The improved methods in this study can provide sufficient accuracy and precision for isotope analysis of plant and soil waters, which can contribute to the fields of ecohydrology and agricultural sciences.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/rcm.10052","type":"journal-article","created":{"date-parts":[[2025,4,21]],"date-time":"2025-04-21T04:40:46Z","timestamp":1745210446000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Improved Methods for High Precision Isotope\u2010Ratio Infrared Laser Spectroscopy of Ecohydrological Waters With Organic Contaminants"],"prefix":"10.1002","volume":"39","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7507-2493","authenticated-orcid":false,"given":"Xinying","family":"Ling","sequence":"first","affiliation":[{"name":"Department of Geosciences Texas Tech University  Texas USA"},{"name":"Department of Environmental Sciences University of California Riverside  Riverside California USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Juske","family":"Horita","sequence":"additional","affiliation":[{"name":"Department of Geosciences Texas Tech University  Texas USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2025,4,21]]},"reference":[{"doi-asserted-by":"publisher","key":"e_1_2_9_2_1","DOI":"10.1021\/ac990621e"},{"doi-asserted-by":"publisher","key":"e_1_2_9_3_1","DOI":"10.1002\/rcm.4100"},{"doi-asserted-by":"publisher","key":"e_1_2_9_4_1","DOI":"10.1029\/2009wr008265"},{"doi-asserted-by":"publisher","key":"e_1_2_9_5_1","DOI":"10.5194\/amt\u20105\u20101491\u20102012"},{"doi-asserted-by":"publisher","key":"e_1_2_9_6_1","DOI":"10.1016\/j.agrformet.2013.02.009"},{"doi-asserted-by":"publisher","key":"e_1_2_9_7_1","DOI":"10.5194\/hess\u201024\u20104413\u20102020"},{"doi-asserted-by":"publisher","key":"e_1_2_9_8_1","DOI":"10.1021\/ac402366t"},{"doi-asserted-by":"publisher","key":"e_1_2_9_9_1","DOI":"10.5194\/amtd-6-10191-2013"},{"doi-asserted-by":"publisher","key":"e_1_2_9_10_1","DOI":"10.1021\/ac701716q"},{"doi-asserted-by":"publisher","key":"e_1_2_9_11_1","DOI":"10.4319\/lom.2012.10.1024"},{"doi-asserted-by":"publisher","key":"e_1_2_9_12_1","DOI":"10.1002\/rcm.9108"},{"doi-asserted-by":"publisher","key":"e_1_2_9_13_1","DOI":"10.1002\/rcm.9055"},{"doi-asserted-by":"publisher","key":"e_1_2_9_14_1","DOI":"10.1002\/rcm.9600"},{"doi-asserted-by":"publisher","key":"e_1_2_9_15_1","DOI":"10.1002\/rcm.4083"},{"doi-asserted-by":"publisher","key":"e_1_2_9_16_1","DOI":"10.1002\/rcm.4597"},{"doi-asserted-by":"publisher","key":"e_1_2_9_17_1","DOI":"10.1002\/rcm.5204"},{"doi-asserted-by":"publisher","key":"e_1_2_9_18_1","DOI":"10.1002\/rcm.5126"},{"doi-asserted-by":"publisher","key":"e_1_2_9_19_1","DOI":"10.1002\/rcm.5236"},{"doi-asserted-by":"publisher","key":"e_1_2_9_20_1","DOI":"10.4236\/as.2014.52021"},{"doi-asserted-by":"publisher","key":"e_1_2_9_21_1","DOI":"10.1002\/rcm.5317"},{"doi-asserted-by":"publisher","key":"e_1_2_9_22_1","DOI":"10.1002\/rcm.7497"},{"doi-asserted-by":"publisher","key":"e_1_2_9_23_1","DOI":"10.1111\/nph.13376"},{"doi-asserted-by":"publisher","key":"e_1_2_9_24_1","DOI":"10.1002\/rcm.9118"},{"doi-asserted-by":"publisher","key":"e_1_2_9_25_1","DOI":"10.5194\/amt\u201016\u20101663\u20102023"},{"doi-asserted-by":"publisher","key":"e_1_2_9_26_1","DOI":"10.1271\/bbb.69.2193"},{"key":"e_1_2_9_27_1","first-page":"1","volume-title":"Triple Oxygen Isotope Geochemistry","author":"Miller M. 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