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ASTM D3978-21a

Current Revision

Standard Practice for Algal Growth Potential Testing with <emph type="ital">Pseudokirchneriella subcapitata</emph>

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1.1 This practice measures, by Pseudokirchnereilla subcapitata growth response, the biological availability of nutrients, as contrasted with chemical analysis of the components of the sample. This practice is useful for assessing the impact of nutrients, and changes in their loading, upon freshwater algal productivity. Other laboratory or indigenous algae can be used with this practice. However, Pseudokirchnereilla subcapitata must be cultured as a reference alga along with the alternative algal species.

1.2 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. For a specific precautionary statement, see Section 16.

1.3 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 The significance of measuring algal growth potential in water samples is that differentiation can be made between the nutrients of a sample determined by chemical analysis and the nutrients that are actually available for algal growth. The addition of nutrients (usually nitrogen and phosphorus singly or in combination) to the sample can give an indication of which nutrient(s) is (are) limiting for algal growth (1,10,11,12,13,14).

SDO ASTM: ASTM International
Document Number D3978
Publication Date Nov. 1, 2021
Language en - English
Page Count 6
Revision Level 21a
Supercedes
Committee E50.47
Publish Date Document Id Type View
Nov. 1, 2021 D3978-21A Revision
Jan. 15, 2021 D3978-21 Revision
April 1, 2004 D3978-04 Revision
Sept. 1, 2012 D3978-04R12 Reaffirmation
Oct. 10, 1998 D3978-80R98 Reaffirmation