{
    "identifier": "ark:\/88434\/mds2-2261",
    "accessLevel": "public",
    "contactPoint": {
        "hasEmail": "mailto:[email protected]",
        "fn": "Joseph M. Conny"
    },
    "programCode": [
        "006:045"
    ],
    "landingPage": "https:\/\/data.nist.gov\/od\/id\/mds2-2261",
    "title": "Evaluation of Thermal Optical Analysis Using an Aqueous Binary Mixture",
    "description": "This dataset contains measurements of organic carbon, elemental carbon, and total carbon in atmospheric particulate matter with the thermal-optical carbon analyzer. The data are associated with the following publication: C.D. Grimes, J.M. Conny, R.R. Dickerson, 2020, \"Evaluation of Thermal-Optical Analysis Using an Aqueous Binary Mixture,\" Atmospheric Environment, in press. Below is the abstract for the publication.\n\nThermal-Optical Analysis (TOA), a commonly implemented technique used to measure the amount of particulate carbon in the atmosphere or deposited on a filter substrate, distinguishes organic carbon (OC) from elemental carbon (EC) through the monitoring of laser light, heating, and measuring evolved carbon.  Here, we present a method to characterize the TOA transmission method with an aqueous binary mixture containing EC and OC that can easily be deposited onto a filter at low volumes. Known amounts of EC and OC were deposited onto a quartz-fiber filter and analyzed with different temperature protocols.  Results with the NIST-EPA-C temperature protocol agreed with the reference values to better than 2 % for EC, OC, total carbon (TC), and EC\/TC. Uncertainty in TC among all temperature protocols was less than 5 % of the reference value while all protocols had EC\/TC ratios with an uncertainty less than 10 %.",
    "language": [
        "en"
    ],
    "distribution": [
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-2261\/All_runs_TOA.xlsx.sha256",
            "mediaType": "text\/plain",
            "title": "SHA256 File for Measurements of Particulate Organic Carbon, Elemental Carbon, and Total Carbon by Thermal-Optical Transmission Analysis"
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-2261\/All_runs_TOA.xlsx",
            "description": "The Excel file contains carbon concentrations from quartz fiber filters as micrograms of carbon per square centimeter of filter material. EC, OC, and TC are elemental carbon, organic carbon, and total carbon, respectively.",
            "mediaType": "application\/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
            "title": "Measurements of Particulate Organic Carbon, Elemental Carbon, and Total Carbon by Thermal-Optical Transmission Analysis"
        },
        {
            "accessURL": "https:\/\/doi.org\/10.18434\/M32261",
            "title": "DOI Access for Evaluation of Thermal Optical Analysis Using an Aqueous Binary Mixture"
        }
    ],
    "bureauCode": [
        "006:55"
    ],
    "modified": "2020-06-03 00:00:00",
    "publisher": {
        "@type": "org:Organization",
        "name": "National Institute of Standards and Technology"
    },
    "theme": [
        "Standards:Reference materials",
        "Environment:Environmental health",
        "Environment:Air \/ water \/ soil quality",
        "Chemistry:Analytical chemistry"
    ],
    "keyword": [
        "black carbon",
        "elemental carbon",
        "organic carbon",
        "organic carbon aerosol",
        "thermal optical transmission analysis",
        "TOT"
    ]
}