{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,26]],"date-time":"2025-10-26T12:05:56Z","timestamp":1761480356437,"version":"build-2065373602"},"reference-count":30,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2020,3,5]],"date-time":"2020-03-05T00:00:00Z","timestamp":1583366400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100012659","name":"Foundation for Innovative Research Groups of the National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["41977084","41571227","41501254"],"award-info":[{"award-number":["41977084","41571227","41501254"]}],"id":[{"id":"10.13039\/501100012659","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":[[2020,5,15]]},"abstract":"\n Rationale<\/jats:title>\n \n Nitrite is well known to be unstable, including during soil extraction with KCl (especially in acidic soils), but the source and fate of NO\n 2<\/jats:sub>\n \u2212<\/jats:sup>\n in the short duration of the extraction process remain unclear.\n <\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n \n A series of\n 15<\/jats:sup>\n N\u2010tracing studies explored NO\n 2<\/jats:sub>\n \u2212<\/jats:sup>\n transformations during KCl extraction in acidic and alkaline soils. Tests considering multiple factors assessed the interactions of such factors as soil sterilization, extraction time, and pH adjustment. After addition of\n 15<\/jats:sup>\n NO\n 2<\/jats:sub>\n \u2212<\/jats:sup>\n ,\n 15<\/jats:sup>\n NH\n 4<\/jats:sub>\n +<\/jats:sup>\n , and\n 15<\/jats:sup>\n NO\n 3<\/jats:sub>\n \u2212<\/jats:sup>\n tracers, the concentrations and isotopic compositions of N\n 2<\/jats:sub>\n O, N\n 2<\/jats:sub>\n , NH\n 4<\/jats:sub>\n +<\/jats:sup>\n , NO\n 3<\/jats:sub>\n \u2212<\/jats:sup>\n , NO\n 2<\/jats:sub>\n \u2212<\/jats:sup>\n , and dissolved organic nitrogen (DON) were measured to investigate the production and consumption of NO\n 2<\/jats:sub>\n \u2212<\/jats:sup>\n .\n <\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n Nitrite was stable in alkaline soils during KCl extraction. In contrast, changes did occur in acidic soils during KCl extraction: NO\n 2<\/jats:sub>\n \u2212<\/jats:sup>\n declined rapidly in the first 10\u2009min of extraction although the subsequent rate of decrease lessened as the extraction time progressed. Significant dilution of\n 15<\/jats:sup>\n NO\n 2<\/jats:sub>\n \u2212<\/jats:sup>\n suggested high rates of NO\n 2<\/jats:sub>\n \u2212<\/jats:sup>\n production and even higher rates of consumption. The soil's organic N was the only source of NO\n 2<\/jats:sub>\n \u2212<\/jats:sup>\n and also its main destination. Soil sterilization showed that NO\n 2<\/jats:sub>\n \u2212<\/jats:sup>\n processes during extraction were chemical, not microbial. The pH adjustment of acidic soil stabilized its NO\n 2<\/jats:sub>\n \u2212<\/jats:sup>\n .\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n \n Overall, the pH adjustment of KCl solution appears favorable for investigating NO\n 2<\/jats:sub>\n \u2212<\/jats:sup>\n dynamics. For example, this work recommends an extraction solution comprising a 4:1 mixture of 2.5\u2009M KCl solution and pH\u20098.4 buffer, which was more convenient to operate than the method reported by Stevens and Laughlin.\n <\/jats:p>\n <\/jats:sec>","DOI":"10.1002\/rcm.8746","type":"journal-article","created":{"date-parts":[[2020,2,24]],"date-time":"2020-02-24T13:31:42Z","timestamp":1582551102000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Dynamics of nitrite in acidic soil during extraction with potassium chloride studied using\n 15<\/sup>\n N tracing"],"prefix":"10.1002","volume":"34","author":[{"given":"Shenyan","family":"Dai","sequence":"first","affiliation":[{"name":"School of Geography Nanjing Normal University Nanjing 210023 China"},{"name":"State Key Laboratory Cultivation Base of Geographical Environment Evolution Nanjing 210023 China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3259-2245","authenticated-orcid":false,"given":"Teng","family":"Wen","sequence":"additional","affiliation":[{"name":"School of Geography Nanjing Normal University Nanjing 210023 China"},{"name":"Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023 China"},{"name":"Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Ministry of Education Nanjing 210023 China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zucong","family":"Cai","sequence":"additional","affiliation":[{"name":"School of Geography Nanjing Normal University Nanjing 210023 China"},{"name":"Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023 China"},{"name":"Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Ministry 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