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ASTM D974-01

(Test Method)

Standard Test Method for Acid and Base Number by Color-Indicator Titration

Standard Test Method for Acid and Base Number by Color-Indicator Titration

SCOPE
1.1 This test method covers the determination of acidic or basic constituents (Note 1) in petroleum products and lubricants soluble or nearly soluble in mixtures of toluene and isopropyl alcohol. It is applicable for the determination of acids or bases whose dissociation constants in water are larger than 109; extremely weak acids or bases whose dissociation constants are smaller than 109 do not interfere. Salts react if their hydrolysis constants are larger than 109.
Note 1—In new and used oils, the constituents considered to have acidic characteristics include organic and inorganic acids, esters, phenolic compounds, lactones, resins, salts of heavy metals, and addition agents such as inhibitors and detergents. Similarly, constituents considered to have basic properties include organic and inorganic bases, amino compounds, salts of weak acids (soaps), basic salts of polyacidic bases, salts of heavy metals, and addition agents such as inhibitors and detergents.
Note 2—This test method is not suitable for measuring the basic constituents of many basic additive-type lubricating oils. Test Method D 4739 can be used for this purpose.
1.2 This test method can be used to indicate relative changes that occur in an oil during use under oxidizing conditions. Although the titration is made under definite equilibrium conditions, the method does not measure an absolute acidic or basic property that can be used to predict performance of an oil under service conditions. No general relationship between bearing corrosion and acid or base numbers is known.
Note 3—Oils, such as many cutting oils, rust proofing oils, and similar compounded oils, or excessively dark-colored oils, that cannot be analyzed for acid number by this test method due to obscurity of the color-indicator end point, can be analyzed by Test Method D 664. The acid numbers obtained by this color-indicator test method need not be numerically the same as those obtained by Test Method D 664, the base numbers obtained by this color indicator test method need not be numerically the same as those obtained by Test Method D 4739, but they are generally of the same order of magnitude.
1.3 The values stated in acceptable SI units are to be regarded as the standard.
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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
09-Nov-2001
ICS
75.080 - Petroleum products in general
75.100 - Lubricants, industrial oils and related products
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.06 - Analysis of Liquid Fuels and Lubricants
Current Stage
Ref Project

Relations

Replaced By
ASTM D974-02 - Standard Test Method for Acid and Base Number by Color-Indicator Titration
Effective Date
10-Jun-2002

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ASTM D974-01 - Standard Test Method for Acid and Base Number by Color-Indicator Titration
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Standards Content (Sample)

An American National Standard
Designation: D 974 – 01
British Standard 2634
Designation: 139/98
Standard Test Method for
1
Acid and Base Number by Color-Indicator Titration
This standard is issued under the fixed designation D 974; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This test method has been adopted for use by government agencies to replace Method 5105 of Federal Test Method Standard No. 791b.
numerically the same as those obtained by Test Method D 664, the base
1. Scope
numbers obtained by this color indicator test method need not be
1.1 This test method covers the determination of acidic or
numerically the same as those obtained by Test Method D 4739, but they
2
basic constituents (Note 1) in petroleum products and lubri-
are generally of the same order of magnitude.
cants soluble or nearly soluble in mixtures of toluene and
1.3 The values stated in acceptable SI units are to be
isopropyl alcohol. It is applicable for the determination of acids
regarded as the standard.
or bases whose dissociation constants in water are larger than
1.4 This standard does not purport to address all of the
−9
10 ; extremely weak acids or bases whose dissociation
safety concerns, if any, associated with its use. It is the
−9
constants are smaller than 10 do not interfere. Salts react if
responsibility of the user of this standard to establish appro-
−9
their hydrolysis constants are larger than 10 .
priate safety and health practices and determine the applica-
NOTE 1—In new and used oils, the constituents considered to have
bility of regulatory limitations prior to use.
acidic characteristics include organic and inorganic acids, esters, phenolic
compounds, lactones, resins, salts of heavy metals, and addition agents
2. Referenced Documents
such as inhibitors and detergents. Similarly, constituents considered to
2.1 ASTM Standards:
have basic properties include organic and inorganic bases, amino com-
D 117 Guide to Sampling Test Methods, Standard Practices,
pounds, salts of weak acids (soaps), basic salts of polyacidic bases, salts
and Guides for Electrical Insulating Oils of Petroleum
of heavy metals, and addition agents such as inhibitors and detergents.
3
Origin
NOTE 2—This test method is not suitable for measuring the basic
D 664 Test Method for Acid Number of Petroleum Products
4
constituents of many basic additive-type lubricating oils. Test Method
by Potentiometric Titration
D 4739 can be used for this purpose. 5
D 1193 Specification for Reagent Water
1.2 This test method can be used to indicate relative changes
D 4175 Terminology Relating to Petroleum, Petroleum
6
that occur in an oil during use under oxidizing conditions.
Products, and Lubricants
Although the titration is made under definite equilibrium
D 4739 Test Method for Base Number Determination by
6
conditions, the method does not measure an absolute acidic or
Potentiometric Titration
basic property that can be used to predict performance of an oil
3. Terminology
under service conditions. No general relationship between
bearing corrosion and acid or base numbers is known.
3.1 Definitions:
3.1.1 acid number, n—the quantity of base, expressed in
NOTE 3—Oils, such as many cutting oils, rustproofing oils, and similar
milligrams of potassium hydroxide per gram of sample that is
compounded oils, or excessively dark-colored oils, that cannot be ana-
required to titrate a sample to a specified end point.
lyzed for acid number by this test method due to obscurity of the
color-indicator end point, can be analyzed by Test Method D 664. The acid 3.1.1.1 Discussion—In this test method, the indicator is
numbers obtained by this color-indicator test method need not be
p-naptholbenzein titrated to a green/green-brown end point in
a toluene-water-isopropanol solvent.
3.1.2 base number, n—the quantity of acid, expressed in
1
This test method is under the jurisdiction of ASTM Committee D02 on
milligrams of potassium hydroxide per gram of sample that is
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
required to titrate a sample to a specified end point.
D02.06 on Analysis of Lubricants.
In the IP, this test method is under the jurisdiction of the Standardization
Committee. This test method was adopted as a joint ASTM-IP standard in 1965.
3
Current edition approved Nov. 10, 2001. Published November 2001. Originally Annual Book of ASTM Standards, Vol 10.03.
4
published as D 974 – 48 T. Last previous edition D 974 – 97. Annual Book of ASTM Standards, Vol 05.01.
2 5
Statements defining this test method, its modification, and its significance when Annual Book of ASTM Standards, Vol 11.01.
6
applied to electrical insulating oils of mineral origin will be found in Guide D 117. Annual Book of ASTM
...

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Standard Test Method for Acid and Base Number by Color-Indicator Titration

SIGNIFICANCE AND USE
5.1 New and used petroleum products can contain basic or acidic constituents that are present as additives or as degradation products formed during service, such as oxidation products. The relative amount of these materials can be determined by titrating with acids or bases. This number, whether expressed as acid number or base number, is a measure of this amount of acidic or basic substances, respectively, in the oil—always under the conditions of the test. This number is used as a guide in the quality control of lubricating oil formulations. It is also sometimes used as a measure of lubricant degradation in service; however, any condemning limits must be empirically established.  
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SCOPE
1.1 This test method covers the determination of acidic or basic constituents (Note 1) in petroleum products3 and lubricants soluble or nearly soluble in mixtures of toluene and isopropyl alcohol. It is applicable for the determination of acids or bases whose dissociation constants in water are larger than 10−9; extremely weak acids or bases whose dissociation constants are smaller than 10−9 do not interfere. Salts react if their hydrolysis constants are larger than 10−9.
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Standard Practice for Automatic Sampling of Petroleum and Petroleum Products

SIGNIFICANCE AND USE
4.1 Representative samples of petroleum and petroleum products are required for the determination of chemical and physical properties, which are used to establish standard volumes, prices, and compliance with commercial terms and regulatory requirements. This practice does not cover sampling of electrical insulating oils and hydraulic fluids. This practice does not address how to sample crude at temperatures below the freezing point of water.
PART I—General
This part is applicable to all petroleum liquid sampling whether it be crude oil or refined products. Review this section before designing or installing any automatic sampling system.
SCOPE
1.1 This practice describes general procedures and equipment for automatically obtaining samples of liquid petroleum and petroleum products, crude oils, and intermediate products from the sample point into the primary container. This practice also provides additional specific information about sample container selection, preparation, and sample handling. If sampling is for the precise determination of volatility, use Practice D5842 (API MPMS Chapter 8.4) in conjunction with this practice. For sample mixing and handling, refer to Practice D5854 (API MPMS Chapter 8.3). This practice does not cover sampling of electrical insulating oils and hydraulic fluids.  
1.2 Table of Contents:    
Section  
INTRODUCTION  
Scope  
1  
Referenced Documents  
2  
Terminology  
3  
Significance and Use  
4  
PART I–GENERAL  
Representative Sampling Components  
5  
Design Criteria  
6  
Automatic Sampling Systems  
7  
Sampling Location  
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Mixing of the Flowing Stream  
9  
Proportionality  
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Sample Extractor Grab Volume  
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Containers  
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Sample Handling and Mixing  
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Control Systems  
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Sample System Security  
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System Proving (Performance Acceptance Tests)  
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Performance Monitoring  
17  
PART II–CRUDE OIL  
Crude Oil  
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PART III–REFINED PRODUCTS  
Refined Products  
19  
KEYWORDS  
Keywords  
20  
ANNEXES  
Calculations of the Margin of Error based on Number of Sample Grabs  
Annex A1  
Theoretical Calculations for Selecting the Sampler Probe Location  
Annex A2  
Portable Sampling Units  
Annex A3  
Profile Performance Test  
Annex A4  
Sampler Acceptance Test Data  
Annex A5  
APPENDIXES  
Design Data Sheet for Automatic Sampling System  
Appendix X1  
Comparisons of Percent Sediment and Water versus Unloading Time Period  
Appendix X2  
Sampling Frequency and Sampling System Monitoring Spreadsheet  
Appendix X3  
Sampling System Monitoring—Additional Diagnostics  
Appendix X4  
1.3 Units—The values stated in either SI units or US Customary (USC) units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Except where there is no direct SI equivalent, such as for National Pipe Threads/diameters, or tubing.  
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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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.

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ASTM D4057-22(Practice)
Standard Practice for Manual Sampling of Petroleum and Petroleum Products

SIGNIFICANCE AND USE
4.1 Samples of petroleum and petroleum products are obtained for many reasons, including the determination of chemical and physical properties. These properties may be used for: calculating standard volumes; establishing product value; and often safety and regulatory reporting.  
4.2 There are inherent limitations when performing any type of sampling, any one of which may affect the representative nature of the sample. As examples, a spot sample provides a sample from only one particular point in the tank, vessel compartment, or pipeline. In the case of running or all-level samples, the sample only represents the column of material from which it was taken.  
4.3 Based on the product, and testing to be performed, this practice provides guidance on sampling equipment, container preparation, and manual sampling procedures for petroleum and petroleum products of a liquid, semi-liquid, or solid state, from the storage tanks, flowlines, pipelines, marine vessels, process vessels, drums, cans, tubes, bags, kettles, and open discharge streams into the primary sample container.
SCOPE
1.1 This practice covers procedures and equipment for manually obtaining samples of liquid petroleum and petroleum products, crude oils, and intermediate products from the sample point into the primary container are described. Procedures are also included for the sampling of free water and other heavy components associated with petroleum and petroleum products.  
1.2 This practice also addresses the sampling of semi-liquid or solid-state petroleum products. For the sampling of green petroleum coke, see Practice D8145. For the sampling of calcined petroleum coke, see Practice D6970.  
1.3 This practice provides additional specific information about sample container selection, preparation, and sample handling.  
1.4 This practice does not cover sampling of electrical insulating oils and hydraulic fluids. If sampling is for the precise determination of volatility, use Practice D5842 (API MPMS Chapter 8.4) in conjunction with this practice. For sample mixing and handling, refer to Practice D5854 (API MPMS Chapter 8.3).  
1.5 The procedures described in this practice may also be applicable in sampling most non-corrosive liquid industrial chemicals provided that all safety precautions specific to these chemicals are followed. Also, refer to Practice E300. The procedures described in this practice are also applicable to sampling liquefied petroleum gases and chemicals. Also refer to Practices D1265 and D3700. The procedure for sampling bituminous materials is described in Practice D140. Practice D4306 provides guidance on sample containers and preparation for sampling aviation fuel.  
1.6 Units—The values stated in SI units are to be regarded as the standard. USC units are reflected in parentheses.  
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1.8 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.

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ASTM D5291-21(Test Method)
Standard Test Methods for Instrumental Determination of Carbon, Hydrogen, and Nitrogen in Petroleum Products and Lubricants

SIGNIFICANCE AND USE
5.1 This is the first ASTM standard covering the simultaneous determination of carbon, hydrogen, and nitrogen in petroleum products and lubricants.  
5.2 Carbon, hydrogen, and particularly nitrogen analyses are useful in determining the complex nature of sample types covered by this test method. The CHN results can be used to estimate the processing and refining potentials and yields in the petrochemical industry.  
5.3 The concentration of nitrogen is a measure of the presence of nitrogen containing additives. Knowledge of its concentration can be used to predict performance. Some petroleum products also contain naturally occurring nitrogen. Knowledge of hydrogen content in samples is helpful in addressing their performance characteristics. Hydrogen to carbon ratio is useful to assess the performance of upgrading processes.
SCOPE
1.1 These test methods cover the instrumental determination of carbon, hydrogen, and nitrogen in laboratory samples of petroleum products and lubricants. Values obtained represent the total carbon, the total hydrogen, and the total nitrogen.  
1.2 These test methods are applicable to samples such as crude oils, fuel oils, additives, and residues for carbon and hydrogen and nitrogen analysis. These test methods were tested in the concentration range of at least 75 % to 87 % by mass for carbon, at least 9 % to 16 % by mass for hydrogen, and  
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1.3.1 However, using Test Method D levels of 0.1 % by mass nitrogen in lubricants could be determined.  
1.4 These test methods are not recommended for the analysis of volatile materials such as gasoline, gasoline-oxygenate blends, or gasoline type aviation turbine fuels.  
1.5 The results of these tests can be expressed as mass % carbon, hydrogen or nitrogen.  
1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.7 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.  
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ASTM
ASTM D6304-20(Test Method)
Standard Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric Karl Fischer Titration

SIGNIFICANCE AND USE
5.1 A knowledge of the water content is important in the manufacturing, purchase, sale, or transfer of petroleum products to help in predicting their quality and performance characteristics.  
5.2 The presence of moisture could lead to premature corrosion and wear, an increase in the debris load resulting in diminished lubrication and premature plugging of filters, an impedance in the effect of additives, and undesirable support of deleterious bacterial growth.
SCOPE
1.1 This test method covers the direct determination of entrained water in petroleum products and hydrocarbons using automated instrumentation. This test method also covers the indirect analysis of water thermally removed from samples and swept with dry inert gas into the Karl Fischer titration cell. Mercaptan, sulfide (S– or H2S), sulfur, and other compounds are known to interfere with this test method (see Section 6). The precision statement of this method covers the nominal range of 20 mg/kg to 25 000 mg/kg for Procedure A, 30 mg/kg to 2100 mg/kg for Procedure B, and 20 mg/kg to 360 mg/kg for Procedure C.  
1.2 This test method is intended for use with commercially available coulometric Karl Fischer reagents and for the determination of water in additives, lube oils, base oils, automatic transmission fluids, hydrocarbon solvents, and other petroleum products. By proper choice of the sample size, this test method may be used for the determination of water from mg/kg to percent level concentrations.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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.

  • Standard
    10 pages
    English language
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  • Standard
    10 pages
    English language
    sale 15% off