ASTM D850-21 pdf free download.Standard Test Method for Distillation of Industrial Aromatic Hydrocarbons and Related Materials.
1.1 This test method covers the distillation of industrial aromatic hydrocarbons and related materials of relatively narrow boiling ranges from 30 to 250°C. arning—This test method is not applicable for styrene which will exothermically polymerize during the distillation process.
1.2 The following applies to all specified limits in this test method: for the purposes of determining conformance to this test method, an observed or calculated value shall be rounded off 6to the nearest unit” in the last right-hand digit used in expressing the specification limit, in accordance with the rounding-off method of Practice E29.
1.3 warning—Mercury has been designated by EPA and many state agencies as a hazardous material that can cause central nervous system, kidney and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Caution should he taken when handling mercury and mercury-containing products. See the applicable product Safety Data Sheet (SDS) for details and EPA’s website (htip:// www.epa.gov/mercury/faq .htm) for additional information. Users should be aware that selling mercury or mercurycontaining products. or both, in your state may he prohibited by state law.
1 .4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
4. Summary of Test Method
4.1 The distillation of a lX-mL sample of industrial ammatic hydrocarbons and related materials is carried out via a carefully controlled distillation wherein temperature readings are noted for the first drop of distillate and when 5, 10, and each additional 10 up to 90. and 95 % of the sample has distilled over. The temperature corresponding to the dry point is also noted.
5. Significance and Use
5. 1 This test method is suitable for setting specifications, for use as an internal quality control tool, and for USC Ifl development or research work on industrial aromatic hydrocarbons and related materials.
5.2 This test method gives a broad indication of general purity and can also indicate presence of excessive moiswre. It will not differentiate between products of similar boiling range.
6. Apparatus
6.1 Distillation flask—A standard 200-mL side-tube, heat- resistant glass distillation flask as shown in Fig.1, conforming to the following dimensions.ASTM D850 pdf download.