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Description of ASTM-C1345 2008ASTM C1345 - 08Standard Test Method for Analysis of Total and Isotopic Uranium and Total Thorium in Soils by Inductively Coupled Plasma-Mass SpectrometryActive Standard ASTM C1345 | Developed by Subcommittee: C26.05 Book of Standards Volume: 12.01 ASTM C1345Significance and Use
This test method measures the presence of uranium and thorium in soil that occurs naturally and as a result of contamination from nuclear operations and uranium ore processing. The reporting detection levels (RDLs) of total uranium and thorium are well below the normal background in soil. The normal background level for uranium is between 3 and 5 ? g/g in most geographic areas and slightly higher for thorium. The 235 U enrichment is also measured from an initial sample pass through the instrument. The other less abundant uranium isotopes ( 234 U and 236 U) are measured down to a typical soil background level after sample concentration and a second sample analysis. This allows for calculation of individual isotopic uranium and total uranium activity. The majority of the uranium activity results from 234 U and 238 U. 1. Scope
1.1 This test method covers the measurement of total uranium (U) and thorium (Th) concentrations in soils, as well as the determination of the isotopic weight percentages of 234 U, 235 U, 236 U, and 238 U, thereby allowing for the calculation of individual isotopic uranium activity or total uranium activity. This inductively coupled plasma-mass spectroscopy (ICP-MS) method is intended as an alternative analysis to methods such as alpha spectroscopy or thermal ionization mass spectroscopy (TIMS). Also, while this test method covers only those isotopes listed above, the instrumental technique may be expanded to cover other long-lived radioisotopes since the preparation technique includes the preconcentration of the actinide series of elements. The resultant sample volume can be further reduced for introduction into the ICP-MS via an electrothermal vaporization (ETV) unit or other sample introduction device, even though the standard peristaltic pump introduction is applied for this test method. The sample preparation removes organics and silica from the soil by use of a high temperature furnace and hydrofluoric acid digestion. Thus, this test method can allow for sample variability of both organic and silica content. This test method is also described in ASTM STP 1291. Since this test method using quadrupole ICP-MS was approved, advances have been made in ICP-MS technology in terms of improved sensitivity and lower instrument background as well as the use of collision or reaction cells (or both) and sector field mass spectrometers with single and multiple detectors. These advances should allow this test method to be performed more effectively but it is the user s responsibility to verify performance. 1.2 The analysis is performed after an initial drying and grinding sample preparation process, and the results are reported on a dry weight basis. The sample preparation technique used incorporates into the sample any rocks and organic material present in the soil. The method of sample preparation applied differs from other techniques, such as those found in Practice C 999 1.3 The values stated in SI units are to be regarded as standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. ASTM Standards C859 Terminology Relating to Nuclear Materials C998 Practice for Sampling Surface Soil for Radionuclides C999 Practice for Soil Sample Preparation for the Determination of Radionuclides C1255 Test Method for Analysis of Uranium and Thorium in Soils by Energy Dispersive X-Ray Fluorescence Spectroscopy D420 Guide to Site Characterization for Engineering Design and Construction Purposes D1193 Specification for Reagent Water D1452 Practice for Soil Exploration and Sampling by Auger Borings D1586 Test Method for Penetration Test (SPT) and Split-Barrel Sampling of Soils D1587 Practice for Thin-Walled Tube Sampling of Soils for Geotechnical Purposes D2113 Practice for Rock Core Drilling and Sampling of Rock for Site Investigation D2216 Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass D3550 Practice for Thick Wall, Ring-Lined, Split Barrel, Drive Sampling of Soils E135 Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials E305 Practice for Establishing and Controlling Atomic Emission Spectrochemical Analytical Curves E456 Terminology Relating to Quality and Statistics E876 Practice for Use of Statistics in the Evaluation of Spectrometric Data E882 Guide for Accountability and Quality Control in the Chemical Analysis Laboratory U.S. EPA Standard Method 6020 SW-846, Inductively Coupled Plasma-Mass SpectrometryASTM Technical Publications STP 1291 Applications of Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) to Radionuclide Determinations Keywords inductively coupled plasma-mass spectrometry (ICP-MS); isotopic ratio; soil; thorium; uranium; ICP-MS (inductively-coupled plasma-mass spectrometry); Isotopic analysis; Soil (radioactive analysis); Thorium; Uranium content; ICS Code ICS Number Code 13.080.10 (Chemical characteristics of soil) DOI: 10.1520/C1345-08 ASTM International is a member of CrossRef. ASTM C1345This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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