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ASTM D4841-88(2018)

Current Reaffirmation

Standard Practice for Estimation of Holding Time for Water Samples Containing Organic and Inorganic Constituents

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1.1 This practice covers the means of estimating the period of time during which a water sample can be stored after collection and preservation without significantly affecting the accuracy of analysis.

1.2 The maximum holding time is dependent upon the matrix used and the specific analyte of interest. Therefore, water samples from a specific source must be tested to determine the period of time that sample integrity is maintained by standard preservation practices.

1.3 In the event that it is not possible to analyze the sample immediately at the time of collection, this practice does not provide information regarding degradation of the constituent of interest or changes in the matrix that may occur from the time of sample collection to the time of the initial analysis.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


5.1 In order to obtain meaningful analytical data, sample preservation techniques must be effective from the time of sample collection to the time of analysis. A laboratory must confirm that sample integrity is maintained throughout maximum time periods between sample collection and analysis. In many cases, it is useful to know the maximum holding time. An evaluation of holding time is useful also in judging the efficacy of various preservation techniques.

SDO ASTM: ASTM International
Document Number D4841
Publication Date Oct. 15, 2018
Language en - English
Page Count 6
Revision Level 88(2018)
Supercedes
Committee D19.02
Publish Date Document Id Type View
Jan. 1, 2013 D4841-88R13E01 Revision
Oct. 15, 2018 D4841-88R18 Reaffirmation
Jan. 1, 2013 D4841-88R13 Reaffirmation
July 15, 2008 D4841-88R08 Reaffirmation
Aug. 10, 2003 D4841-88R03 Reaffirmation
July 10, 1998 D4841-88R98 Reaffirmation