ASTM D1218-21
Standard Test Method for Refractive Index and Refractive Dispersion of Hydrocarbon Liquids

Standard No.

ASTM D1218-21

Release Date

2021

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D1218-21

Scope

1.1 This test method covers the measurement of refractive index, accurate to four decimal places or better, of transparent and light-colored hydrocarbons in the range of 1.3300 to 1.5000 at temperatures from 20 °C to 30 °C by manual (optical-mechanical) or automatic (digital) procedure. 1.2 The manual (optical-mechanical) procedure also covers the measurement of refractive dispersion accurate to the fourth decimal place or better. NOTE 1—The test method may be suitable for measuring the refractive indices of liquids above 1.5000 and at temperatures both below 20 °C and above 30 °C; however, the test method precision may not apply. Verification of the accuracy of such measurements will depend upon the availability of reliable, certified reference standards that demonstrate the performance of the instrument used under the particular measuring conditions. 1.3 The test method may not be applicable to liquids that are strongly colored, or that have bubble points so near the test temperature that a reading cannot be obtained before substantial weathering takes place. Liquid color should be limited to No. 4 ASTM Color or lighter, as determined by Test Method D1500. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 WARNING—Mercury has been designated by many regulatory agencies as a hazardous substance that can cause serious medical issues. Mercury, or its vapor, has been demonstrated to be hazardous to health and corrosive to materials. Use Caution when handling mercury and mercury-containing products. See the applicable product Safety Data Sheet (SDS) for additional information. The potential exists that selling mercury or mercury-containing products, or both, is prohibited by local or national law. Users must determine legality of sales in their location. 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM D1218-21 Referenced Document

• ASTM D1193 Standard Specification for Reagent Water
• ASTM D1500 Standard Test Method for ASTM Color of Petroleum Products (ASTM Color Scale)
• ASTM D6299 Standard Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measurement System Performance*， 2023-07-01 Update
• ASTM D6300 Standard Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants
• ASTM E1 Standard Specification for ASTM Thermometers

ASTM D1218-21 history

• 2021 ASTM D1218-21 Standard Test Method for Refractive Index and Refractive Dispersion of Hydrocarbon Liquids
• 2012 ASTM D1218-12(2016) Standard Test Method for Refractive Index and Refractive Dispersion of Hydrocarbon Liquids
• 2012 ASTM D1218-12 Standard Test Method for Refractive Index and Refractive Dispersion of Hydrocarbon Liquids
• 2002 ASTM D1218-02(2007) Standard Test Method for Refractive Index and Refractive Dispersion of Hydrocarbon Liquids
• 2002 ASTM D1218-02 Standard Test Method for Refractive Index and Refractive Dispersion of Hydrocarbon Liquids
• 1999 ASTM D1218-99 Standard Test Method for Refractive Index and Refractive Dispersion of Hydrocarbon Liquids
• 1982 ASTM D1218-82 Standard Test Method for Refractive Index and Refractive Dispersion of Hydrocarbon Liquids