ASTM D4515-85(2001) PDF

Scope: 1.1 This practice describes 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 highly matrix-dependent and is also dependent on 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 those cases where 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 matrix that may occur from the time of sample collection to the time of the initial analysis. 1.4 This practice does not provide information regarding holding time for concentration of analyte less than one order of magnitude above the criterion of detection. 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.

ASTM D4515-85(2001) Referenced Document

ASTM D1129 Standard Terminology Relating to Water
ASTM D1193 Standard Specification for Reagent Water
ASTM D2777 Standard Practice for Determination of Precision and Bias of Applicable Methods of Committee D-19 on Water
ASTM D3694 Standard Practices for Preparation of Sample Containers and for Preservation of Organic Constituents*， 2017-12-15 Update

2001 ASTM D4515-85(2001) Standard Practice for Estimation of Holding Time for Water Samples Containing Organic Constituents