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ASTM International, 06/01/2012
Publisher: ASTM
File Format: PDF
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Published:01/06/2012
Pages:10
File Size:1 file , 590 KB
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1.1 This test method is applicable to the on-line measurement of turbidity under 5 nephelometric turbidity units (NTU) in water.
1.2 It is the user's responsibility to ensure the validity of this test method for waters of untested matrices.
1.3 In this test method calibration standards are defined in NTU values, but other assigned turbidity units are assumed to be equivalent.
1.4 This test method assigns traceable reporting units to the type of respective technology that was used to perform the measurement. Units are numerically equivalent with respect to the calibration standard. For example, a 1 NTU formazin standard is also equal to a 1 FNU (formazin nephelometric units) standard, a 1 FNRU (formazin nephelometric ratio units) standard, and so forth.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.
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