Item talk:Q237802
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{
"USGS Publications Warehouse": { "@context": "https://schema.org", "@type": "Article", "additionalType": "Journal Article", "name": "Comparison of \u03b418O measurements in nitrate by different combustion techniques", "identifier": [ { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse IndexID", "value": "70214395", "url": "https://pubs.usgs.gov/publication/70214395" }, { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse Internal ID", "value": 70214395 }, { "@type": "PropertyValue", "propertyID": "DOI", "value": "10.1021/ac025854b", "url": "https://doi.org/10.1021/ac025854b" } ], "journal": { "@type": "Periodical", "name": "Analytical Chemistry", "volumeNumber": "74", "issueNumber": "20" }, "inLanguage": "en", "isPartOf": [ { "@type": "CreativeWorkSeries", "name": "Analytical Chemistry" } ], "datePublished": "2002", "dateModified": "2021-03-16", "abstract": "Three different KNO3\u00a0salts with \u03b418O values ranging from about \u221231 to +54\u2030 relative to VSMOW were used to compare three off-line, sealed glass tube combustion methods (widely used for isotope studies) with a more recently developed on-line carbon combustion technique. All methods yielded roughly similar isotope ratios for KNO3\u00a0samples with \u03b418O values in the midpoint of the \u03b418O scale near that of the nitrate reference material IAEA-NO-3 (around +21 to +25\u2030). This reference material has been used previously for one-point interlaboratory and intertechnique calibrations. However, the isotope ratio scale factors by all of the off-line combustion techniques are compressed such that they are between 0.3 and 0.7 times that of the on-line combustion technique. The contraction of the \u03b418O scale in the off-line preparations apparently is caused by O isotope exchange between the sample and the glass combustion tubes. These results reinforce the need for nitrate reference materials with \u03b418O values far from that of atmospheric O2, to improve interlaboratory comparability.", "description": "4 p.", "publisher": { "@type": "Organization", "name": "American Chemical Society" }, "author": [ { "@type": "Person", "name": "Revesz, Kinga M. krevesz@usgs.gov", "givenName": "Kinga M.", "familyName": "Revesz", "email": "krevesz@usgs.gov" }, { "@type": "Person", "name": "Bohlke, John Karl", "givenName": "John Karl", "familyName": "Bohlke", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0001-5693-6455", "url": "https://orcid.org/0000-0001-5693-6455" } } ], "funder": [ { "@type": "Organization", "name": "Toxic Substances Hydrology Program", "url": null } ] }, "OpenAlex": { "abstract_inverted_index": { "Three": [ 0 ], "different": [ 1 ], "KNO3": [ 2, 51 ], "salts": [ 3 ], "with": [ 4, 34, 53, 154 ], "delta18O": [ 5, 54, 61, 155 ], "values": [ 6, 55, 156 ], "ranging": [ 7 ], "from": [ 8, 158 ], "about": [ 9 ], "-31": [ 10 ], "to": [ 11, 16, 20, 73, 163 ], "+54": [ 12 ], "per": [ 13, 75 ], "thousand": [ 14 ], "relative": [ 15 ], "VSMOW": [ 17 ], "were": [ 18 ], "used": [ 19, 30, 82 ], "compare": [ 21 ], "three": [ 22 ], "off-line,": [ 23 ], "sealed": [ 24 ], "glass": [ 25, 142 ], "tube": [ 26 ], "combustion": [ 27, 41, 101, 118, 143 ], "methods": [ 28, 44 ], "(widely": [ 29 ], "for": [ 31, 50, 84, 150 ], "isotope": [ 32, 48, 92, 135 ], "studies)": [ 33 ], "a": [ 35 ], "more": [ 36 ], "recently": [ 37 ], "developed": [ 38 ], "on-line": [ 39, 117 ], "carbon": [ 40 ], "technique.": [ 42, 119 ], "All": [ 43 ], "yielded": [ 45 ], "roughly": [ 46 ], "similar": [ 47 ], "ratios": [ 49 ], "samples": [ 52 ], "in": [ 56, 126 ], "the": [ 57, 60, 66, 91, 99, 116, 123, 127, 138, 141, 148 ], "midpoint": [ 58 ], "of": [ 59, 65, 98, 115, 122, 160 ], "scale": [ 62, 94, 125 ], "near": [ 63 ], "that": [ 64, 106, 114, 159 ], "nitrate": [ 67, 151 ], "reference": [ 68, 78, 152 ], "material": [ 69, 79 ], "IAEA-NO-3": [ 70 ], "(around": [ 71 ], "+21": [ 72 ], "+25": [ 74 ], "thousand).": [ 76 ], "This": [ 77 ], "has": [ 80 ], "been": [ 81 ], "previously": [ 83 ], "one-point": [ 85 ], "interlaboratory": [ 86, 165 ], "and": [ 87, 111, 140 ], "intertechnique": [ 88 ], "calibrations.": [ 89 ], "However,": [ 90 ], "ratio": [ 93 ], "factors": [ 95 ], "by": [ 96, 133 ], "all": [ 97 ], "off-line": [ 100, 128 ], "techniques": [ 102 ], "are": [ 103, 108 ], "compressed": [ 104 ], "such": [ 105 ], "they": [ 107 ], "between": [ 109, 137 ], "0.3": [ 110 ], "0.7": [ 112 ], "times": [ 113 ], "The": [ 120 ], "contraction": [ 121 ], "6180": [ 124 ], "preparations": [ 129 ], "apparently": [ 130 ], "is": [ 131 ], "caused": [ 132 ], "O": [ 134 ], "exchange": [ 136 ], "sample": [ 139 ], "tubes.": [ 144 ], "These": [ 145 ], "results": [ 146 ], "reinforce": [ 147 ], "need": [ 149 ], "materials": [ 153 ], "far": [ 157 ], "atmospheric": [ 161 ], "O2,": [ 162 ], "improve": [ 164 ], "comparability.": [ 166 ] }, "apc_list": null, "apc_paid": null, "authorships": [ { "author_position": "first", "author": { "id": "https://openalex.org/A5051500258", "display_name": "Kinga R\u00e9v\u00e9sz", "orcid": null }, "institutions": [ { "id": "https://openalex.org/I1286329397", "display_name": "United States Geological Survey", "ror": "https://ror.org/035a68863", "country_code": "US", "type": "government", "lineage": [ "https://openalex.org/I1286329397", "https://openalex.org/I1335927249" ] } ], "countries": [ "US" ], "is_corresponding": false, "raw_author_name": "Kinga R\u00e9v\u00e9sz", "raw_affiliation_strings": [ "U.S. Geological Survey, 431 National Center, Reston, Virginia 20192." ], "affiliations": [ { "raw_affiliation_string": "U.S. Geological Survey, 431 National Center, Reston, Virginia 20192.", "institution_ids": [ "https://openalex.org/I1286329397" ] } ] }, { "author_position": "last", "author": { "id": "https://openalex.org/A5020519397", "display_name": "J. 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