BS 6057 is a series on rubber latices. Rubber latices are a stable dispersion (emulsion) of polymer microparticles in water. BS 6057-3.6 specifies a method for the determination of the volatile fatty acid number of natural rubber latex concentrate.
Note: The method is not necessarily suitable for latices from natural sources other than Hevea brasiliensis and is not applicable to compounded latex, vulcanized latex, or artificial dispersions of rubber or synthetic rubber latices.
BS 6057-3.6 on the determination of the volatile fatty acid number of natural rubbers latices is useful for:
Latexes are found in nature, but synthetic latexes are common as well. BS 6057-3.6 defines the volatile fatty acid (VFA) number of latex concentrates which is the number of grams of potassium hydroxide equivalent to the volatile fatty acids in latex the concentrate containing 100 g of total solids. A test portion is coagulated with ammonium sulfate and a portion of the resultant serum is separated and acidified with sulfuric acid. The acidified serum is steam-distilled, and the volatile acids present in the test portion are determined by titration of the distillate with a standard volumetric barium hydroxide solution.
The test report includes a reference to BS 6057-3.6, all details necessary for the identification of the test sample, the results, and the units in which they have been expressed. Any unusual features noted during the determination, any operations not included in BS 6057-3.6 or in the International Standards to which reference is made, and any operations regarded as optional. Using BS 6057-3.6 you can specify a method for the determination of the volatile fatty acid number of natural rubber latex concentrate.
ISO 506:1992