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ASTM D3731-20
Standard Practices for Measurement of Chlorophyll Content of Algae in Surface Waters
NORMA vydaná dňa 1.6.2020
Informácie o norme:
Označenie normy: ASTM D3731-20
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.6.2020
Kód tovaru: NS-995299
Počet strán: 5
Približná hmotnosť: 15 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Kategórie - podobné normy:
Anotácia textu normy ASTM D3731-20 :
Keywords:
algae surface water, chlorophyll, pheophytin ,, ICS Number Code 13.060.10 (Water of natural resources)
Doplňujúce informácie
| Significance and Use |
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5.1 Data on the chlorophyll content of the algae have the following applications: 5.1.1 To provide estimates of algal biomass and productivity. 5.1.2 To provide general information on the taxonomic composition (major groups) of the algae, based on the relative amounts of chlorophyll a, b, and 5.1.3 To determine long-term trends in water quality. 5.1.4 To determine the trophic status of surface waters. 5.1.5 To detect adverse effects of pollutants on plankton and periphyton in receiving waters. 5.1.6 To determine maximum growth rates and yields in algal growth potential tests. |
| 1. Scope |
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1.1 These practices include the extraction and the measurement of chlorophyll a, b, and 1.1.1 Spectrophotometric, trichromatic practice for measuring chlorophyll a, b, and 1.1.2 Spectrophotometric, monochromatic practice for measuring chlorophyll a corrected for pheophytin a; and for measuring pheophytin 1.1.3 Fluorometric practice for measuring chlorophyll 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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. 1.4 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. |
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