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  • ASTM
    D4841-88(2013)e1 Standard Practice for Estimation of Holding Time for Water Samples Containing Organic and Inorganic Constituents
    Edition: 2013
    $93.60
    Unlimited Users per year

Description of ASTM-D4841 2013

ASTM D4841 - 88(2013)e1

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

Active Standard ASTM D4841 | Developed by Subcommittee: D19.02

Book of Standards Volume: 11.01




ASTM D4841

Significance and Use

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.

1. Scope

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


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D1129 Terminology Relating to Water

D1192 Guide for Equipment for Sampling Water and Steam in Closed Conduits

D1193 Specification for Reagent Water

D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water

D3694 Practices for Preparation of Sample Containers and for Preservation of Organic Constituents

D4210 Practice for Intralaboratory Quality Control Procedures and a Discussion on Reporting Low-Level Data

D4375 Practice for Basic Statistics in Committee D19 on Water

E178 Practice for Dealing With Outlying Observations


Keywords

degredation; estimation; holding time; storage limit; water ;


ICS Code

ICS Number Code 13.060.30 (Sewage water)


DOI: 10.1520/D4841

ASTM International is a member of CrossRef.

ASTM D4841

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About ASTM

ASTM 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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