ASTM C1310-2001(2007)
使用流体喷射预集中的感应耦合等离子体质谱测量法测定土壤中放射性核素的标准试验方法已作废

Standard Test Method for Determining Radionuclides in Soils by Inductively Coupled Plasma-Mass Spectrometry Using Flow Injection Preconcentration

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标准号

ASTM C1310-2001(2007)

发布日期

2001年

实施日期

废止日期

2011-06-01

中国标准分类号

P13

国际标准分类号

34;13.030.30;17.240

发布单位

US-ASTM

适用范围

The test methods in this standard may be used to measure the concentrations of ⁹⁹Tc, ²³⁰Th, and ²³⁴U in soil samples. The test methods are applicable to soils that have been contaminated by nuclear-related activities such as uranium ore processing and uranium enrichment. The FI concentration step reduces detection limits by approximately a factor of ten compared to ICP-MS with conventional sample introduction. Approximate IDLs are listed in Table 1.

TABLE 1 Instrument Detection Limits^A

Isotope	In Solution		In Soil
	Bq/L	pCi/L	Bq/kg	pCi/g
Technetium-99	0.03	0.8	12	0.3
Thorium-230	0.04	1	4	0.1
Uranium-234	0.007	0.2	0.7	0.02

^A Detection limits are instrument-dependent. These limits were obtained using a Perkin-Elmer Sciex model ELAN 5000 ICP-MS with a FIAS-400MS flow injection system.

1.1 This test method covers a procedure for measuring ⁹⁹Tc and a procedure for measuring ²³⁰Th and ²³⁴U in soils. It is applicable to background soils and soils that have been contaminated by nuclear processes. It is intended as an alternative to radiochemical methods because it is faster, requires less labor, and produces less waste than many radiochemical methods.

1.2 Samples are dried, ground, dissolved by fusion, and analyzed by inductively coupled plasma-mass spectrometry (ICP-MS). A sequential flow injection (FI) technique is used to provide lower detection limits than those obtained with direct aspiration into an ICP-MS, and, in the case of ⁹⁹Tc, provides separation from interferences.

1.3 The ²³⁰Th and ²³⁴U procedure also would work for ²³²Th, ²³⁵U, and ²³⁸U, but the FI preconcentration usually is not required to measure these isotopes at the concentrations typically found in soils.

1.4 This test method is guided by quality control procedures derived from U.S. EPA procedures for inorganic analysis reported in SW-846 and the Contract Laboratory Program Statement of Work. The required level of quality control may vary between laboratories and projects. Laboratory statistical quality control procedures are required to ensure that this test method is reliable.

1.5 Becquerel (Bq) is the acceptable metric unit for radionuclide activity. However, picocurie (pCi) frequently is the unit used to express regulatory limits for radioactivity. The values stated in either of these units shall be regarded as standard. The values stated in each system may not be exact equivalents; therefore, each system must be used independently of the other, without combining values in any way.

1.6 Refer to Practi......

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