ASTM D1552-16 (R2021) pdf free download.Standard Test Method for Sulfur in Petroleum Products by High Temperature Combustion and Infrared (IR) Detection or Thermal Conductivity Detection (TCD).
1.1 This test method covers procedures for the determination of total sulfur in petroleum products including lubricating oils containing additives, and in additive concentrates. This test method is applicable to samples boiling above 177 °C (350 °F) and containing a mass fraction of sulfur between 0.22 % and 24.2 %. Other sulfur concentrations may be analyzed. hut the precision stated may or may not apply. These procedures use 1R detection or TCD following combustion in a furnace.
1.2 Petroleum coke containing a mass fraction of sulfur between 2.53 % to 3.79 % sulfur may be analyzed. Other sulfur concentrations may be analyzed. but the precision stated may or may not apply.
4. Significance and Use
4.1 This test method provides a means of monitoring the sulfur level of various petroleum products and additives. This knowledge can be used to predict performance, handling, or processing properties. In some cases the presence of sulfur compounds is beneficial to the product and monitoring the depletion of sulfur can provide useful information. In other cases the presence of sulfur compounds is detrimental to the processing or use of the product.
5. Apparatus
5. 1 combustion Furnace:
5.1.1 Procedure A—Furnace capable of maintaining a constant temperature (between 1150 °C minimum and 1450 °C maximum) sufficient to ensure quantitative recovery of sulfur as its corresponding gas SO2.
5.1.2 Procedure B—Furnace capable of maintaining a temperature (1150 °C) sufficient to ensure quantitative recovery of sulfur as its corresponding gas SO2.
5.2 Combustion and Sulfur Deection System, comprised of automatic balance, gas flow controls, drying tubes, oxygen scrubber, adsorptionldesorption traps as required, combustion furnace, combustion boats or tin (Sn) containers as required and either an IR (Procedure A) or TCD (Procedure B) SO, detector.
5.3 Sieve, 60 mesh (250 um).
6. Reagents and Materials
6.1 Purity of Reagents—Rea gent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where such specifications are available.3 Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high purity to permit its use without lessening the accuracy of the determination.
6.2 Combustion Pronzoter—M agnesiu m oxide (MgO). tu ngsten trioxode (W03). or aluminum oxide (Al2O3). Alternatively, COM-CAT, a dual promoter that is both a fixing agent and oxidizing agent, may be used.ASTM D1552 pdf download.