1. Scope
1. Scope 1.1 This test method is used to determine the weight loss as a function of time of plastic film materials (including formulation additives), when incubated under changing, open, marine aquarium conditions, which is representative of aquatic environments near the coasts. The goal of this test is to obtain data that will predict real world experiences based the extent and rate of biodegradation data of the same materials obtained from the laboratory test ASTM D6691. The aquarium incubated films are examined for visual degradation and dry weight loss over time. This test is not a replacement to ASTM D6691, but rather a confirmation of the results. 1.2 Plastic film pieces of known size and thickness are used at levels so as not to exceed the availability of micronutrients essential for and therefore limit the microbial biodegradation process. 1.3 The Aquarium incubation test method employs the indigenous microorganisms present in seawater and marine sediment to be enriched for and carry out the biodegradation. It is recommended that the test be carried out in the geographical vicinity (latitudinal area) where the test film is likely to be used and potentially disposed of in the marine environment if biodegradable criteria are met. 1.4 Prior to conducting this qualitative Aquarium test method (weight loss data) for the determination of biodegradability, ASTM D6691 shall be run on the same film materials to establish quantitative levels of the plastic organic carbon oxidation and levels of carbon dioxide recovered there from. If either ASTM D6691 present in natural seawater and sediment) are positive, then this Aquarium test method should be applied. If ASTM D6691 demonstrates satisfactory biodegradation activity and are deemed negative then Aquarium incubation testing need not be done, and the material shall be considered non-biodegradable in the marine environment within an accepted time frame. 1.5 This test shall not be used as the basis for claims, such as Biodegradable in Marine Environments. These can only be made by meeting the requirements of ASTM D7081. 1.6 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 method to establish appropriate safety and health practices and determine the application of regulatory limitations prior to use. NOTE 1 There is no known ISO or other equivalent to this standard.
Keywords
keywords
The title and scope are in draft form and are under development within this ASTM Committee.
Citing ASTM Standards
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