ISO 19679-16-2016 pdf free.Plastics – Determination of aerobic biodegradation of non-floating plastic materials in a seawater/sediment interface – Method by analysis of evolved carbon dioxide.
ISO 19679-16 specifies a test method to determine the degree and rate of aerobic biodegradation of plastic materials when settled on marine sandy sediment at the interface between seawater and the seafloor, by measuring the evolved carbon dioxide.
This test method is a simulation under laboratory conditions of the habitat found In different seawarer/sedirnent•arcas In the sea, e.g. in a benthic zone where sunlight reaches the ocean floor (photic zone) that. in marine science, is called sublittoral zone
The determination of biodegradation of plastic materials buried in marine sediment is outside the scope of this International Standard.
Measurement of aerobic hkxlegradation can also be obtained by monitoring the oxygen consumption. as described In ISO 18830.
The conditions described in this International Standard may not always correspond to the optimum conditions for the maximum degree of biodegradation to occur.
2 NormatIve references
The following documents. In whole or in part, are normatively referenced in this document and are indispensable for Its application. For dated references, only the edition cited applies, For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 14852:1999, Determination of the ultimate aerobic biodegradability of plastic materials in an aqueous medium — Method by analysis of evolved carbon dioxide
ISO 8245, Water quality — Guidelines for the determinatIon of total organic carbon (TOC) and dissolved organic carbon (DOC)
3 Terms and definitions
For the purposes of this document the following terms and definitions apply.
3.1 theoretical amount of evolved carbon dioxide
TbCO2 maximum theoretical amount of carbon dioxide evolved after completely oxidising a chemical compound, calculated from the molecular formula or from determination of total organic carbon (TOC)
Note Ito entry: It Is expressed as milligrams of carbon dioxide evolved per milligram or grain of test compound.
3.2 total organic carbon TOC amount 01 carbon bound in an organic compound.ISO 19679-16 pdf download.