ASTM D483-04(R2018) pdf free download

ASTM D483-04(R2018) pdf free download.Standard Test Method for Unsulfonated Residue of Petroleum Plant Spray Oils
1. Scope
1.1 This test method covers the determination of unsul- fonated residue in plant spray oils of petroleum origin and applies only to the petroleum oil content. It provides a measure of the degree of refinement of plant spray oils by determining the extent to which the oil is attacked by 98.61 % sulfuric acid under closely standardized conditions. Since the relationship between unsulfonated residue and the actual composition ofthe oil is not known, this test method should be applied only for measuring the degree of refinement and not for the determina- tion of aromatics or olefins, or both. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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. 1.4 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.
6. Apparatus
6.1 Sulfonation Flask—The flask is shown in Fig. A1.1 and described in Annex A1. 6.2 Meniscus Viewing Lens, focusing type, consisting of eyepiece and objective to facilitate reading the meniscus with a minimum of parallax, is recommended. 6.3 Water Baths—Two water baths maintained at 25 °C 6 0.5 °C and 99.5 °C to 100 °C, and conforming to the require- ments prescribed in Annex A1. 6.4 Shaking Machine—The exact design described in the appendix is required for uniform control of shaking and precision results. Hand shaking is permissible if technique is developed to correlate results by machine shaking. 6.5 Centrifuge—A centrifuge as described in Annex A1 is recommended.
7. Reagents
7.1 Purity of Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all reagents shall conform to the specifications of the Commit- tee 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. 7.1.1 Commercially prepared solutions may be used when they meet or exceed the specifications set in 7.1. 7.2 Fuming Sulfuric Acid (approximately 15 % free SO 3 ). (Warning—See 7.3 and7.4.) 7.3 Sulfuric Acid (98.61 %)—Prepare by blending reagent- grade fuming and concentrated sulfuric acids to a concentration of 98.61 % 6 0.1 % H 2 SO 4 as determined by titration. (Warning—Corrosive. Health hazard. Oxidizer.) (Warning— While preparing the reagent, protect the face with a safety mask and place the flask in a tray.) 7.4 Sulfuric Acid (sp gr 1.84, approximately 95 %)— Concentrated sulfuric acid (H 2 SO 4 ). (Warning—Corrosive. Health hazard. Oxidizer.).
8. Reference Spray Oil
8.1 Test results for unsulfonated residue are highly depen- dent upon rate of shaking. A reference spray oil has been calibrated for unsulfonated residue by a group of cooperating laboratories using both machine and hand shaking. Instructions are given in Section 8 for using this reference oil as a guide to ensure that the rate of shaking is correct.
9. Calibration
9.1 Machine Shaking Rate—A rate of 425 cycles ⁄min was used in the cooperative work to establish the unsulfonated residue of the reference spray oil. There are small variations in severity of shaking between individual machines, even when they are newly built and of the same make; and these differences can increase with use. Consequently, each labora- tory shall run occasional tests on the reference spray oil. If an unsulfonated residue is found which differs by more than 60.4 % from the established value, the rate of shaking shall be adjusted accordingly. A faster rate tends to give a lower unsulfonated residue, and vice versa.