ASTM D8130-17

Standard Test Method for Determination of Metals in Purified Terephthalic Acid (PTA) by Inductively Coupled Plasma Atomic Emission Spectrometric Method

SIGNIFICANCE AND USE
4.1 The presence of metals in PTA used for the production of polyester is undesirable because they may speed up or slow down the reaction and be impurities in the final product.  
4.2 Determination of the metals in PTA is often required. This test method is suitable for setting specifications and for use as an internal quality control where these products are produced or used.  
4.3 This test method covers the determination of sodium, chromium, cobalt, aluminum, titanium, potassium, magnesium, manganese, iron, nickel, molybdenum and calcium.
SCOPE
1.1 This test method covers the determination of metal elements in purified terephthalic acid (PTA) by inductively coupled plasma atomic emission spectrometry (ICP-AES).This method is applicable to PTA samples containing sodium, chromium, cobalt, aluminum, titanium, potassium, magnesium, manganese, iron, nickel, molybdenum and calcium over 0.055 mg/kg, respectively.  
1.2 In determining the conformance of the test results using this method to applicable specification, results shall be rounded off in accordance with the rounding-off method of Practice E29.  
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.

General Information

• Status: Published
• Publication Date: 31-Jul-2017
• ICS: 71.080.40 - Organic acids
• Technical Committee: D16 - Aromatic, Industrial, Specialty and Related Chemicals
• Drafting Committee: D16.02 - Oxygenated Aromatics

Relations

• Refers: ASTM D7111-15 - Standard Test Method for Determination of Trace Elements in Middle Distillate Fuels by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)
• Effective Date: 01-Apr-2015
• Refers: ASTM D6809-02(2016) - Standard Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
• Effective Date: 01-Nov-2016
• Refers: ASTM D4790-14 - Standard Terminology of Aromatic Hydrocarbons and Related Chemicals
• Effective Date: 01-Jul-2014
• Referred By: ASTM D8062-23 - Standard Specification for Purified Terephthalic Acid (PTA) with Low <emph type="ital" >p</emph>-Toluic Acid
• Effective Date: 01-Aug-2017

Standards Content (Sample)

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.
Designation:D8130 −17
Standard Test Method for
Determination of Metals in Purified Terephthalic Acid (PTA)
by Inductively Coupled Plasma Atomic Emission
1
Spectrometric Method
This standard is issued under the fixed designation D8130; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope D6809 Guide for Quality Control and Quality Assurance
Procedures for Aromatic Hydrocarbons and Related Ma-
1.1 This test method covers the determination of metal
terials
elements in purified terephthalic acid (PTA) by inductively
D7111 Test Method for Determination of Trace Elements in
coupled plasma atomic emission spectrometry (ICP-AES).This
Middle Distillate Fuels by Inductively Coupled Plasma
method is applicable to PTA samples containing sodium,
Atomic Emission Spectrometry (ICP-AES)
chromium, cobalt, aluminum, titanium, potassium,
E29 Practice for Using Significant Digits in Test Data to
magnesium, manganese, iron, nickel, molybdenum and cal-
Determine Conformance with Specifications
cium over 0.055 mg/kg, respectively.
E177 Practice for Use of the Terms Precision and Bias in
1.2 In determining the conformance of the test results using
ASTM Test Methods
thismethodtoapplicablespecification,resultsshallberounded
E691 Practice for Conducting an Interlaboratory Study to
off in accordance with the rounding-off method of Practice
Determine the Precision of a Test Method
3
E29.
2.2 ISO Document:
EN ISO 8213 Chemical products for industrial use—
1.3 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this Sampling techniques—Solid chemical products in the
form of particles varying from powders to coarse lumps
standard.
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2.3 Other Document:
1.4 This standard does not purport to address all of the
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
safety concerns, if any, associated with its use. It is the
1910.1200
responsibility of the user of this standard to establish appro-
priate safety, health and environmental practices and deter-
3. Summary of Test Method
mine the applicability of regulatory limitations prior to use.
3.1 A PTA sample is dissolved in ammonium hydroxide
1.5 This international standard was developed in accor-
solution.Calibrationstandardsarepreparedbymixingmetallic
dance with internationally recognized principles on standard-
standard materials in ammonium hydroxide solution.An inter-
ization established in the Decision on Principles for the
nal standard material is added to the calibration standards and
Development of International Standards, Guides and Recom-
the sample solution to compensate for variations of test
mendations issued by the World Trade Organization Technical
specimenintroductionefficiency.Thecalibrationstandardsand
Barriers to Trade (TBT) Committee.
the sample solution are aspirated into the ICP-AES instrument.
2. Referenced Documents
The concentrations of the elements in the sample solution are
2
calculatedbycomparingemissionintensityratiosofthesample
2.1 ASTM Standards:
solution and calibration standards to the internal standard.
D1193 Specification for Reagent Water
D4790 Terminology ofAromatic Hydrocarbons and Related
4. Significance and Use
Chemicals
4.1 The presence of metals in PTA used for the production
1 of polyester is undesirable because they may speed up or slow
This test method is under the jurisdiction of ASTM Committee D16 on
Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsi-
down the reaction and be impurities in the final product.
bility of Subcommittee D16.02 on Oxygenated Aromatics.
Current edition approved Aug. 1, 2017. Published September 2017. DOI:
3
10.1520/D8130-17. Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 4th Floor, New York, NY 10036, http://www.ansi.org.
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contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Available from U.S. Government Printing Office, Superintendent of
Standards volume information, refer to the standard’s Document Summary page on Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://
the ASTM website. www.access.gpo.gov.
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D8130−17
A
TABLE 1 Element and Recommended Wavelengths
6.4 P
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