AS 4439.3:2019 pdf free
AS 4439.3:2019 pdf free.Wastes, sediments and contaminated soils
The percentage solids are typically determined by pressure filtering a weighed portion and weighing the extracted sample liquid. A second test portion is subjected to pressure filtration and the sample liquid collected and stored. The solids remaining are reduced in particle size if necessary and leached by agitation with a selected leaching fluid. The solids leachate is recovered by pressure filtration through a glass fibre filter with 0.6 μm to 0.8 μm effective pore size. The sample liquid and solids leachate are then analysed by appropriate test methods.
The leaching fluid shall be tested immediately before use to ensure conformity to the specified pH value. Leaching fluids not prepared immediately prior to use shall also be examined for indication of contamination or deterioration. In the presence of microbial growth, colouration, solid or suspended matter, the solution shall be discarded and fresh leaching fluid prepared.
Capable of containing up to 100 g of sample and up to 2 000 g of leaching fluid, with at least 100 mL of headspace. Extraction bottles shall be free of the target analytes.
NOTE 1 Smaller bottles can be used where minimal sample mass is submitted to a laboratory (see Clause 7.4.3).
NOTE 2 A glass extraction bottle with a PTFE lined lid is not suitable as an extraction bottle for leachates requiring PFAS analysis. Where a PFAS assessment is required, a separate test portion should be leached in a fit-for-purpose container, i.e. an HDPE bottle (no liner) or similar plastic container that has been shown to be free of PFAS and/or have no background detectable levels of PFAS greater than 20 % of the appropriate limit in the blank leachate.
Filter discs to suit devices specified in Clause 6.9 and made of borosilicate glass fibres, not containing binder materials and with an effective pore size of 0.6 μm to 0.8 μm or equivalent, are suitable.
NOTE The filters used should be assessed for the potential retention of PFAS analytes (due to chemical adherence). Where >10 % retention is suspected, then an alternative method is to centrifuge the resulting leachate and analyse the supernatant. This deviation should be recorded on the analytical report.AS 4439.3 pdf free download.
