GB/T 30921.1-2014Test method of purified terephthalic acid (PTA) for industrial use - Part 1: Determination of concentrations of 4-carboxybenzaldehyde (4-CBA) and p-toluic acid (p-TOL) (English PDF)
工业用精对苯二甲酸（PTA）试验方法 第1部分：对羧基苯甲醛（4-CBA）和对甲基苯甲酸(p-TOL)含量的测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
July 8, 2014
Implementation date
December 1, 2014
Scope
GB/T 30921.1-2014 is the English-translated version of 工业用精对苯二甲酸（PTA）试验方法 第1部分：对羧基苯甲醛（4-CBA）和对甲基苯甲酸(p-TOL)含量的测定.
GB/T 30921.1-2014 is the Chinese standard "Test method of purified terephthalic acid (PTA) for industrial use - Part 1: Determination of concentrations of 4-carboxybenzaldehyde (4-CBA) and p-toluic acid (p-TOL)".
Its scope clause reads: This section GB/T 30921 specifies the determination of industrial purified terephthalic acid (PTA) in carboxybenzaldehyde (4-CBA) and methyl Benzoic acid (p-TOL) and high performance liquid chromatography, high performance capillary electrophoresis.
This Part applies to HPLC content of 4-CBA and p-TOL at 2mg/kg and 10mg/kg or more, respectively, Determination of terephthalic acid fine specimen; HPCE apply to the content of 4-CBA and p-TOL were at 1mg/kg and 5mg kg more refined/rated terephthalic acid sample. Its clauses include high performance liquid chromatography.
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Document preview — GB/T 30921.1-2014
National Standard of the People's Republic of China
- ICS
- 71.080.40
- Classification
- G 16
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 High Performance Liquid Chromatography
- 3.1 Principle of the method
- 3.2 Reagents and materials
1 Scope
This section GB/T 30921 specifies the determination of industrial purified terephthalic acid (PTA) in carboxybenzaldehyde (4-CBA) and methyl
Benzoic acid (p-TOL) and high performance liquid chromatography, high performance capillary electrophoresis.
This Part applies to HPLC content of 4-CBA and p-TOL at 2mg/kg and 10mg/kg or more, respectively,
Determination of terephthalic acid fine specimen; HPCE apply to the content of 4-CBA and p-TOL were at 1mg/kg and
5mg kg more refined/rated terephthalic acid sample.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 3723 Sampling of chemical products for industrial use General Safety (GB/T 3723-1999, idt ISO 3165. 1976)
GB/T 6679 General rules for sampling solid chemical products
GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)
GB/T 8170 repair value expressed about the rules and limit values and judgment
3 High Performance Liquid Chromatography
3.1 Principle of the method
Under the conditions specified in this part, the amount of dissolved ammonia solution PTA sample is injected into high performance liquid chromatography, the use shade
Ion-exchange column and acetonitrile (or methanol) - phosphate solution as the mobile phase, or the use of chemically bonded octadecyl-type columns to B
Nitrile - phosphoric acid aqueous solution as mobile phase, the sample of 4-CBA and p-TOL separated, detected with UV detector and external standard method
Quantified.
3.2 Reagents and materials
3.2.1 ammonium dihydrogen phosphate
AR.
3.2.2 methanol
high performance liquid chromatography (HPLC) grade.
3.2.3 acetonitrile
high performance liquid chromatography (HPLC) grade.
3.2.4 Phosphate
AR.
3.2.5 ammonia
AR.
3.2.6 Water
Water line with two GB/T 6682 stipulated.
3.2.7 phosphoric acid solution
phosphoric acid and water volume ratio 1.4 formulated as a solution.
3.2.8 ammonia solution
concentrated aqueous ammonia and water to be formulated into a solution of 1 volume ratio.
3.2.9 microporous membrane
0.22µm.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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Related Standards
GB/T 30921.2-2016 — Test method of purified terephthalic acid (PTA) for industrial use—Part 2: Determination of metal content
GB/T 30921.3-2016 — Test method of purified terephthalic acid (PTA) for industrial use - Part 3: Determination of water content
GB/T 30921.4-2016 — Test method of purified terephthalic acid (PTA) for industrial use—Part 4: Determination of titanium content—Diantipyrylmethane photometric method
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