Item talk:Q68572

{

 "USGS Publications Warehouse": {
   "schema": {
     "@context": "https://schema.org",
     "@type": "CreativeWork",
     "additionalType": "USGS Numbered Series",
     "name": "Determination of the \u03b434S of Total Sulfur in Solids: RSIL Lab Code 1800",
     "identifier": [
       {
         "@type": "PropertyValue",
         "propertyID": "USGS Publications Warehouse IndexID",
         "value": "tm10C4",
         "url": "https://pubs.usgs.gov/publication/tm10C4"
       },
       {
         "@type": "PropertyValue",
         "propertyID": "USGS Publications Warehouse Internal ID",
         "value": 79778
       },
       {
         "@type": "PropertyValue",
         "propertyID": "DOI",
         "value": "10.3133/tm10C4",
         "url": "https://doi.org/10.3133/tm10C4"
       }
     ],
     "inLanguage": "en",
     "isPartOf": [
       {
         "@type": "CreativeWorkSeries",
         "name": "Techniques and Methods"
       }
     ],
     "datePublished": "2006",
     "dateModified": "2013-02-11",
     "abstract": "The purpose of Reston Stable Isotope Laboratory Lab (RSIL) Code 1800 is to determine the \u03b4(34S/32S), abbreviated as \u03b434S, of total sulfur in a solid sample. A Carlo Erba NC 2500 elemental analyzer (EA) is used to convert total sulfur in a solid sample into SO2 gas. The EA is connected to a continuous flow isotope-ratio mass spectrometer (CF-IRMS), which determines the relative difference in stable sulfur isotope-amount ratio (34S/32S) of the product SO2 gas. The combustion is quantitative; no isotopic fractionation is involved. Samples are placed in tin capsules and loaded into a Costech Zero-Blank Autosampler on the EA. Under computer control, samples are dropped into a heated tube reaction tube that combines both the oxidation and the reduction reactions. The combustion takes place in a He atmosphere that contains an excess of oxygen gas at the oxidation zone at the top of the reaction tube. Combustion products are transported by a He carrier through the reduction zone at the bottom of the reaction tube to remove excess oxygen and through a separate drying tube to remove any water. The gas-phase products, mainly CO2, N2, and SO2, are separated by a gas chromatograph (GC). The gas is then introduced into the isotope-ratio mass spectrometer (IRMS) through a Thermo-Finnigan ConFlo II interface, which also is used to inject SO2 reference gas and He for sample dilution. The IRMS is a Thermo-Finnigan DeltaPlus CF-IRMS. It has a universal triple collector with two wide cups and a narrow cup in the middle. It is capable of measuring mass/charge (m/z) 64 and 66 simultaneously. The ion beams from SO2 are as follows: m/z 64 = SO2 = 32S16O16O; and m/z 66 = SO2 = 34S16O16O primarily.",
     "description": "viii, 31 p.; ill.; Appendices",
     "publisher": {
       "@type": "Organization",
       "name": "U.S. Geological Survey"
     },
     "author": [
       {
         "@type": "Person",
         "name": "Coplen, Tyler B. tbcoplen@usgs.gov",
         "givenName": "Tyler B.",
         "familyName": "Coplen",
         "email": "tbcoplen@usgs.gov",
         "identifier": {
           "@type": "PropertyValue",
           "propertyID": "ORCID",
           "value": "0000-0003-4884-6008",
           "url": "https://orcid.org/0000-0003-4884-6008"
         },
         "affiliation": [
           {
             "@type": "Organization",
             "name": "WMA - Earth System Processes Division",
             "url": "https://www.usgs.gov/mission-areas/water-resources"
           },
           {
             "@type": "Organization",
             "name": "National Water Quality Program",
             "url": "https://www.usgs.gov/programs/national-water-quality-program"
           },
           {
             "@type": "Organization",
             "name": "WMA - Laboratory & Analytical Services Division",
             "url": "https://www.usgs.gov/mission-areas/water-resources"
           },
           {
             "@type": "Organization",
             "name": "National Research Program - Eastern Branch",
             "url": "https://www.usgs.gov/centers/arizona-water-science-center"
           }
         ]
       },
       {
         "@type": "Person",
         "name": "Revesz, Kinga",
         "givenName": "Kinga",
         "familyName": "Revesz"
       }
     ],
     "funder": [
       {
         "@type": "Organization",
         "name": "Reston Stable Isotope Laboratory",
         "url": "https://www.usgs.gov/labs/reston-stable-isotope-laboratory"
       }
     ]
   }
 }

}