ASTM D1552-16(R2021) pdf free download

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. Scope
1.1 This test method covers procedures for the determina- tion 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, but the precision stated may or may not apply. These procedures use IR 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. N OTE 1—The D1552 – 08 (2014) version ofthis standard contained two other procedures using iodate titrations. Since these procedures are no longer being used in the industry laboratories based on a survey of D02.SC 3 laboratories conducted in September 2014, they are being deleted. For earlier information on the deleted procedures, D1552 – 08 (2014) may be perused. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 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. 1.5 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.
3. Summary of Test Method
3.1 The sample is weighed and placed into a furnace having an oxygen atmosphere sufficient to combust the entire sample and a temperature between 1150 °C and 1450 °C for Procedure A or 1150 °C for Procedure B. Most sulfur present is com- busted to SO 2 , which is then measured with a detector after moisture and dust are removed by traps. The instrument calculates the mass percent sulfur from the sample mass, the integrated detector signal, and a predetermined calibration factor. The calibration factor is determined using standards approximating the material to be analyzed. 3.1.1 Procedure A—After combustion of the sample and subsequent moisture/dust removal, SO 2 is measured using infrared (IR) detection. 3.1.2 Procedure B—After combustion of the sample and subsequent moisture/dust removal, SO 2 is measured using thermal conductivity detection. An apparatus utilizing TCD may require the sample gas to pass an oxygen scrubber and adsorption/desorption traps to allow passing of contaminants prior to measuring SO 2 .
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 con- stant temperature (between 1150 °C minimum and 1450 °C maximum) sufficient to ensure quantitative recovery of sulfur as its corresponding gas SO 2 . 5.1.2 Procedure B—Furnace capable of maintaining a tem- perature (1150 °C) sufficient to ensure quantitative recovery of sulfur as its corresponding gas SO 2 . 5.2 Combustion and Sulfur Detection System, comprised of automatic balance, gas flow controls, drying tubes, oxygen scrubber, adsorption/desorption traps as required, combustion furnace, combustion boats or tin (Sn) containers as required and either an IR (Procedure A) or TCD (Procedure B) SO 2 detector. 5.3 Sieve, 60 mesh (250 µm).