Tiêu chuẩn quốc tế
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Số hiệu
Standard Number
ASTM D7168-16
Năm ban hành 2016
Publication date
Tình trạng
A - Còn hiệu lực
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Tên tiếng Anh
Title in English Standard Test Method for 99Tc in Water by Solid Phase Extraction Disk
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Chỉ số phân loại Quốc tế (ICS)
By field |
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Số trang
Page 7
Giá:
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Phạm vi áp dụng
Scope of standard 1.1 This test method describes a solid phase extraction (SPE) procedure to separate 99Tc from environmental water (non-process-related or effluent water samples). Technetium-99 beta activity is measured by liquid scintillation spectrometry. 1.2 This test method is designed to measure 99Tc in the range of approximately 0.037 Bq/L (1.0 pCi/L) or greater for a one litre sample. 1.3 This test method has been used successfully with tap water. It is the user's responsibility to ensure the validity of this test method for samples larger than 1 L and for waters of untested matrices. 1.4 Technetium-99 alternatively can be determined in water samples using Practice D8026. 1.5 The values stated in SI units are to be regarded as standard. The values given in parentheses are provided for information only and are not considered standard. 1.6 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. For specific hazard statements, see Section 9.
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