{"refrec":{"BRefID":302585,"RR":"<b>Wang, Z.A.; Sonnichsen, F.N.; Bradley, A.M.; Hoering, K.A.; Lanagan, T.M.; Chu, S.N.; Hammar, T.R.; Camilli, R.</b> (2015). In situ sensor technology for simultaneous spectrophotometric measurements of seawater total dissolved inorganic carbon and pH. <i>Environ. Sci. Technol. 49(7)</i>: 4441-4449. <a href=\"https://dx.doi.org/10.1021/es504893n\" target=\"_blank\">https://dx.doi.org/10.1021/es504893n</a>","BEntID":294830,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Environ. Sci. Technol. 49(7)</i>: 4441-4449. <a href=\"https://dx.doi.org/10.1021/es504893n\" target=\"_blank\">https://dx.doi.org/10.1021/es504893n</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Wang, Z.A.; Sonnichsen, F.N.; Bradley, A.M.; Hoering, K.A.; Lanagan, T.M.; Chu, S.N.; Hammar, T.R.; Camilli, R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Wang, Z.A. <i>et al.</i>","Englishabstract":"A new, in situ sensing system, Channelized Optical System (CHANOS), was recently developed to make high-resolution, simultaneous measurements of total dissolved inorganic carbon (DIC) and pH in seawater. Measurements made by this single, compact sensor can fully characterize the marine carbonate system. The system has a modular design to accommodate two independent, but similar measurement channels for DIC and pH. Both are based on spectrophotometric detection of hydrogen ion concentrations. The pH channel uses a flow-through, sample-indicator mixing design to achieve near instantaneous measurements. The DIC channel adapts a recently developed spectrophotometric method to achieve flow-through CO<sub>2</sub> equilibration between an acidified sample and an indicator solution with a response time of only ∼90 s. During laboratory and in situ testing, CHANOS achieved a precision of ±0.0010 and ±2.5 μmol kg<sup>–1</sup> for pH and DIC, respectively. In situ comparison tests indicated that the accuracies of the pH and DIC channels over a three-week time-series deployment were ±0.0024 and ±4.1 μmol kg<sup>–1</sup>, respectively. This study demonstrates that CHANOS can make in situ, climatology-quality measurements by measuring two desirable CO<sub>2</sub> parameters, and is capable of resolving the CO<sub>2</sub> system in dynamic marine environments.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"In situ sensor technology for simultaneous spectrophotometric measurements of seawater total dissolved inorganic carbon and pH","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-15 01:33:08.114378","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2015,"MonPub":null,"DateUpdate":"2018-10-29","DateCreate":"2018-10-29","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000352659000052","VABBcode":null,"OpenAcc":0,"DOI":"10.1021/es504893n"},"refs":null,"anarec":{"AnaID":302585,"PubliDate":2015,"Pagination":"4441-4449","XtraPublOfAnaID":null,"ISBN":null,"Volume":"49","Issue":"7","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42837,"SerRR":"Environmental Science and Technology. 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