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ASTM D6470-99

(Test Method)

Standard Test Method for Salt in Crude Oils (Potentiometric Method)

Standard Test Method for Salt in Crude Oils (Potentiometric Method)

SCOPE
1.1 This test method covers the determination of salt in crude oils. For the purpose of this test method, salt is expressed as % (m/m) NaCl (sodium chloride) and covers the range from 0.0005 to 0.15 % (m/m).
1.2 The limit detection is 0.0002 % (m/m) for salt (as NaCl).
1.3 The test method is applicable to nearly all of the heavier petroleum products, such as crude oils, residues, and fuel oils. It may also be applied to used turbine oil and marine diesel fuel to estimate seawater contamination. Water extractable salts, originating from additives present in oils, are codetermined.
1.4 The values stated in SI units are to be regarded as the standard.
1.5 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-1999
ICS
75.180.30 - Volumetric equipment and measurements
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.03 - Elemental Analysis
Current Stage
Ref Project

Relations

Replaced By
ASTM D6470-99(2004) - Standard Test Method for Salt in Crude Oils (Potentiometric Method)
Effective Date
01-May-2004
Referred By
ASTM D4057-22 - Standard Practice for Manual Sampling of Petroleum and Petroleum Products
Effective Date
10-Nov-1999
Referred By
ASTM D8056-18 - Standard Guide for Elemental Analysis of Crude Oil
Effective Date
10-Nov-1999
Referred By
ASTM D7578-20 - Standard Guide for Calibration Requirements for Elemental Analysis of Petroleum Products and Lubricants
Effective Date
10-Nov-1999
Referred By
ASTM D7455-19 - Standard Practice for Sample Preparation of Petroleum and Lubricant Products for Elemental Analysis
Effective Date
10-Nov-1999

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ASTM D6470-99 - Standard Test Method for Salt in Crude Oils (Potentiometric Method)ASTM D6470-99 - Standard Test Method for Salt in Crude Oils (Potentiometric Method)
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ASTM D6470-99 - Standard Test Method for Salt in Crude Oils (Potentiometric Method)
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
An American National Standard
Designation: D 6470 – 99
Standard Test Method for
1
Salt in Crude Oils (Potentiometric Method)
This standard is issued under the fixed designation D 6470; 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.
1. Scope D 4928 Test Method for Water in Crude Oils by Coulom-
4
etric Karl Fischer Titration
1.1 This test method covers the determination of salt in
E 200 Practice for Preparation, Standardization, and Stor-
crude oils. For the purpose of this test method, salt is expressed
age of Standard and Reagent Solutions for Chemical
as % (m/m) NaCl (sodium chloride) and covers the range from
5
Analysis
0.0005 to 0.15 % (m/m).
1.2 The limit of detection is 0.0002 % (m/m) for salt (as
3. Summary of Test Method
NaCl).
3.1 After homogenizing the crude oil with a mixer, a
1.3 The test method is applicable to nearly all of the heavier
weighed aliquot is dissolved in xylene at 65°C and extracted
petroleum products, such as crude oils, residues, and fuel oils.
with specified volumes of alcohol, acetone, and water in an
It may also be applied to used turbine oil and marine diesel fuel
electrically heated extraction apparatus. A portion of the
to estimate seawater contamination. Water extractable salts,
aqueous extract is analyzed for total halides by potentiometric
originating from additives present in oils, are codetermined.
titration.
1.4 The values stated in SI units are to be regarded as the
standard.
4. Significance and Use
1.5 This standard does not purport to address all of the
4.1 A knowledge of water extractable inorganic halides in
safety concerns, if any, associated with its use. It is the
oil is important when deciding whether or not the oils need
responsibility of the user of this standard to establish appro-
desalting. Excessive halide, especially in crude oil, frequently
priate safety and health practices and determine the applica-
results in higher corrosion rates in refining units.
bility of regulatory limitations prior to use.
5. Apparatus
2. Referenced Documents
5.1 Extraction Apparatus, made of borosilicate glass, con-
2.1 ASTM Standards:
2 forming to the dimensions given in Fig. 1, and consisting of the
D 329 Specification for Acetone
following component parts:
2
D 770 Specification for Isopropyl Alcohol
2 5.1.1 Boiling Flask, 500 mL capacity.
D 843 Specification for Nitration Grade Xylene
5.1.2 Hopkins Reflux Condenser, having a vapor outlet
3
D 1193 Specification for Reagent Water
4 connected by a rubber tube to an outside vent or to a suction
D 4006 Test Method for Water in Crude Oil by Distillation
hood.
D 4057 Practice for Manual Sampling of Petroleum and
4 5.1.3 Thistle Tube, approximately 70 mL capacity, with a
Petroleum Products
line to indicate approximately the 50 mL level.
D 4177 Practice for Automatic Sampling of Petroleum and
4 5.1.4 Heating Tube, containing a chimney for increasing
Petroleum Products
convection in the liquid.
D 4377 Test Method for Water in Crude Oils by Potentio-
4 5.1.5 Heating Coil, 250 W, consisting of a suitable gage of
metric Karl Fischer Titration
Nichrome wire.
5.1.6 Rheostat, of suitable resistance and capacity, for
1
regulating the heater.
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
5.2 Safety Shield, colorless safety glass, or equivalent, to be
D02.03 on Elemental Analysis.
mounted in front of the extraction apparatus (see 5.1).
Current edition approved Nov. 10, 1999. Published January 2000.
2
Annual Book of ASTM Standards, Vol 06.04.
3
Annual Book of ASTM Standards, Vol 11.01.
4 5
Annual Book of ASTM Standards, Vol 05.02. Annual Book of ASTM Standards, Vol 15.05.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D6470–99
NOTE 1—Hopkins-type condenser is used.
FIG. 1 Extraction Apparatus
5.3 Sampling Tube, glass, length approximately 600 mm, 5.8 Filter Paper, Whatman No. 41, or equivalent.
I.D. approximately 5 mm, with a bulb having a volume of 100 5.9 Stopwatch.
mL, or more, and drawn out at one end to an opening of inside
6. Reagents and Materials
diameter (I.D.) 2 to 3 mm. A pipette with cut-off tip makes a
6.1 Purity of Reagents—Unless otherwise indicated, it is
suitable sample tube.
intended that all reagents shall conform to the specifications of
5.4 Potentiometric Titration Equipment, with a measuring
the Committee on Analytical Reagents of the American Chemi-
accuracy of 6 2 mV, or better, provi
...

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This specification covers hot- and cold-worked precipitation-hardenable nickel alloy rod, bar, forgings, and forging stock for high-temperature service. Chemical analysis shall be performed on the alloy and shall conform to the chemical composition requirement in carbon, manganese, silicon, phosphorus, sulfur, chromium, cobalt, molybdenum, columbium, tantalum, titanium, aluminum, zirconium, boron, iron, copper, and nickel. The material shall follow recommended annealing treatment, solution treatment, stabilizing treatment, and precipitation hardening treatment. Tension testing, hardness testing and stress-rupture testing shall be performed on the material and shall comply to the required tensile strength, yield strength, elongation, reduction in area, and Brinell hardness.
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5.1 A standard procedure is necessary to establish property changes for spilled oils or petroleum products at different oil weathering stages.  
5.2 This procedure employs standardized equipment, and test procedures.  
5.3 This procedure should be performed at the stages of weathering corresponding to the spill conditions of interest.
SCOPE
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