ASTM D5517-14(R2021) pdf free download

ASTM D5517-14(R2021) pdf free download.Standard Test Method for Determining Extractability of Metals from Art Materials
1. Scope
1.1 This test method covers the extraction ofmetals from art materials using an extractant that simulates the acid potential of gastric juice. This test method is similar to the extraction method in Specification F963, except that it requires conduct- ing extraction steps at body temperature instead of at room temperature. The extraction procedure specified in this test method is more rigorous than that noted in Specification F963 because the procedure causes the extraction ofa larger quantity of metal. 1.2 This test method is adapted from the European Toy Safety Standard, EN 71-3:1994 but differs from it in that a solvent extraction step is not required for processing waxes or oil-based products and no specific acceptable metal levels are specified. 1.3 The rationale for this test method is discussed in Appendix X1. 1.4 This test method should be used on the art material as a whole and not an art material ingredient. Testing the art material as whole would be expected to give a more accurate estimate of soluble metal than from an extrapolation from testing ingredients. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.7 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
4. Summary of Test Method
4.1 A powdered, liquid, comminuted or ground art material is mixed with a 0.07 N hydrochloric acid solution and, after adjusting the pH to 1.5, is shaken for 1 h and then allowed to sit for an additional hour. These extraction steps are conducted at 37 6 2°C. Solids are separated from the extractant by centrifugation and filtration through a 0.45-µm filter. The resultant eluate is then analyzed for the metal(s) of interest.
5. Significance and Use
5.1 This acid extraction method is intended to indicate the solubility of metals from art materials in a weak acid medium. This test method may be useful as one indicator of the amount of metal that is readily available for absorption. It is not meant as a replacement for in vivo tests of absorption of a metal. 6 Other relevant information, when available, should be included in the overall toxicological assessment of metal-containing art materials, such as physico-chemical properties, toxicokinetics (absorption, distribution, metabolism and excretion), and mechanisms of toxicity of the metal(s) of interest. 5.2 Maximum levels of metal extraction are seen with this test method when results are 250 ppm or less. If results are greater than 250 ppm, the extractant volume should be in- creased to 100 mL.
8. Preparation of Test Portions
8.1 A test portion is approximately 100 mg. 8.2 Art materials that are in the form of a liquid, dust or comminuted solid or are metals, are tested without further preparation. 8.3 Scraped coatings of art materials are prepared by com- minuting the sample sufficient to pass through a 0.5-mm sieve. 8.4 Films, textiles, and paper are prepared by cutting into approximately 6 by 6 mm squares. 8.5 Solids are comminuted, ground or scraped to prepare a sample sufficient to pass through a 0.5 mm sieve. 8.6 100 to 200 mg ofoil-based semi-solids should be spread on acid washed Whatman 40 filter paper circles (9 cm) prior to extraction.