ASTM D4130-08

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D 4130–03 Designation:D4130–08
Standard Test Method for
1
Sulfate Ion in Brackish Water, Seawater, and Brines
This standard is issued under the fixed designation D4130; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope *
1.1 This test method covers the turbidimetric determination of sulfate ion in brackish water, seawater, and brines. It has been
usedsuccessfullywithsyntheticbrinegradewaters;however,itistheuser’sresponsibilitytoensurethevalidityofthistestmethod
to other matrices.
1.2 This test method is applicable to waters having an ionic strength greater than 0.65 mol/L and a sulfate ion concentration
greater than 25 mg/L. A concentration less than 25 mg/L sulfate can be determined by using a standard addition method.
1.3 For brines having an ionic strength of less than 0.65 mol/L, refer to Test Methods D516.
1.4
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D516 Test MethodsMethod for Sulfate Ion in WaterWater
2
D1129 Terminology Relating to Water
2
D1192Specification for Equipment for Sampling Water and Steam in Closed Conduits Terminology Relating to Water
2
D1193 Specification for Reagent Water Water
2
D2777 Practice for Determination of Precision and Bias ofApplicable Test Methods of Committee D-19D19 on Water Water
2
D3370 Practices for Sampling Water from Closed Conduits Conduits
2
D5810 Guide for Spiking into Aqueous Samples Samples
D5847 Practice for Writing Quality Control Specifications for Standard Test Methods for Water AnalysisAnalysis
E275 Practice for Describing and Measuring Performances of Ultraviolet, Visible, and Near Infrared Spectrophotometers
Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers
3. Terminology
3.1 Definitions: —ForFor definitions of terms used in this test method, refer to Terminology D1129.
4. Summary of Test Method
4.1 A sulfate ion is converted to a barium sulfate suspended under controlled conditions. A glycerin-acid solution is added to
acidify and stabilize the suspension.Acalculated volume of a NaCl solution is added to adjust the ionic strength to a set value of
2 mol/L (Note 1). The turbidity resulting upon addition of barium chloride is determined by a photoelectric colorimeter and
compared to a curve prepared from standard sulfate solutions.
+ 2+ 2+ − + 2+
NOTE 1—Theionicstrength(IS)ofthesampleiscalculatedfromtheconcentrationofthemajorionconstituents(Na ,Ca ,Mg ,Cl ),(K andSr
if their concentration exceeds 2000 mg/L) as follows:
where:
2
IS, mol/L = 1/2 ( CZ ,
i i
C = g/L ion i/molecular weight ion, i, and
i
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD19onWaterandisthedirectresponsibilityofSubcommitteeD19.05onInorganicConstituentsinWater.
Current edition approved June 10, 2003. Published July 2003. Originally approved in 1982. Last previous edition approved in 1999 as D 4130–99.
Current edition approved Nov. 15, 2008. Published November 2008. Originally approved in 1982. Last previous edition approved in 2003 as D4130–03.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
, Vol 11.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D4130–08
Z = valence of ion i.
i
5. Significance and Use
5.1 The determination of sulfate and other dissolved constituents is important in identifying the source of brines produced
during the drilling and production phases of crude oil or natural gas.
6. Interferences
6.1 Suspended matter in the sample must be removed. Dark colors that cannot be compensated for in the procedure interfere
with the measurement of sus
...

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D 4130–03 Designation:D4130–08
Standard Test Method for
1
Sulfate Ion in Brackish Water, Seawater, and Brines
This standard is issued under the fixed designation D4130; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope *
1.1 This test method covers the turbidimetric determination of sulfate ion in brackish water, seawater, and brines. It has been
usedsuccessfullywithsyntheticbrinegradewaters;however,itistheuser’sresponsibilitytoensurethevalidityofthistestmethod
to other matrices.
1.2 This test method is applicable to waters having an ionic strength greater than 0.65 mol/L and a sulfate ion concentration
greater than 25 mg/L. A concentration less than 25 mg/L sulfate can be determined by using a standard addition method.
1.3 For brines having an ionic strength of less than 0.65 mol/L, refer to Test Methods D516.
1.4
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D516 Test MethodsMethod for Sulfate Ion in Water Water
2
D1129Terminology Relating to Water
2
D1192Specification for Equipment for Sampling Water and Steam in Closed Conduits Terminology Relating to Water
2
D1193 Specification for Reagent Water Water
2
D2777 Practice for Determination of Precision and Bias ofApplicableTest Methods of Committee D-19D19 onWater Water
2
D3370 Practices for Sampling Water from Closed Conduits Conduits
2
D5810 Guide for Spiking into Aqueous Samples Samples
D5847 Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis Analysis
E275Practice for Describing and Measuring Performances of Ultraviolet, Visible, and Near Infrared Spectrophotometers
Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers
3. Terminology
3.1 Definitions: —ForFor definitions of terms used in this test method, refer to Terminology D1129.
4. Summary of Test Method
4.1 A sulfate ion is converted to a barium sulfate suspended under controlled conditions. A glycerin-acid solution is added to
acidify and stabilize the suspension.Acalculated volume of a NaCl solution is added to adjust the ionic strength to a set value of
2 mol/L (Note 1). The turbidity resulting upon addition of barium chloride is determined by a photoelectric colorimeter and
compared to a curve prepared from standard sulfate solutions.
+ 2+ 2+ − + 2+
NOTE 1—Theionicstrength(IS)ofthesampleiscalculatedfromtheconcentrationofthemajorionconstituents(Na ,Ca ,Mg ,Cl ),(K andSr
if their concentration exceeds 2000 mg/L) as follows:
where:
2
IS, mol/L = 1/2 ( CZ ,
i i
C = g/L ion i/molecular weight ion, i, and
i
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD19onWaterandisthedirectresponsibilityofSubcommitteeD19.05onInorganicConstituentsinWater.
Current edition approved June 10, 2003. Published July 2003. Originally approved in 1982. Last previous edition approved in 1999 as D 4130–99.
Current edition approved Nov. 15, 2008. Published November 2008. Originally approved in 1982. Last previous edition approved in 2003 as D4130–03.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
, Vol 11.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D4130–08
Z = valence of ion i.
i
5. Significance and Use
5.1 The determination of sulfate and other dissolved constituents is important in identifying the source of brines produced
during the drilling and production phases of crude oil or natural gas.
6. Interferences
6.1 Suspended matter in the sample must be removed. Dark colors that cannot be compensated for in the procedure interfere
with the measurement of suspe
...