GB/T 7602.4-2017Quantitative determination of T501 oxidation inhibitor content in transformer oil or turbine oil -- Part 4: GC/MS method (English PDF)
变压器油、涡轮机油中T501抗氧化剂含量测定法 第4部分：气质联用法
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Issued by
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Level / Type
National · Recommended
Issue date
November 1, 2017
Implementation date
May 1, 2018
Scope
GB/T 7602.4-2017 is the English-translated version of 变压器油、涡轮机油中T501抗氧化剂含量测定法 第4部分：气质联用法.
GB/T 7602.4-2017 — GB/T 7602 provisions of this part of the transformer oil, turbine oil added T501 (2,6-di-tert-butyl p-cresol) antioxidant containing Quantitative gas chromatography - mass spectrometry method.
This section applies to unused and in operation transformer oil, turbine oil T501 antioxidant content determination.
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Document preview — GB/T 7602.4-2017
National Standard of the People's Republic of China
- ICS
- 75.100; 29.040
- Classification
- E 38
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Contents
- Foreword
- 3.4 The degree of conformity with IEC 60666.2010 is not equivalent.
- 1 Scope
- 2 Normative references
- 3 Method summary
- 4 reagents and materials
- 4.3 Dimethyl Phthalate (DMP). Analytical purity.
- 4.4 Blank oil T501-free mineral insulating oil or turbine oil.
- 4.5 syringe filter membrane .0.45µm, PTFE material.
- 4.6 syringe .2.5 mL.
- 4.7 centrifuge tube .50mL.
- 4.8 Helium - Purity not less than 99.99%.
- 5 instruments
- 5.1 gas chromatograph
- 0.25 µm.
Foreword
GB/T 7602 "transformer oil, turbine oil T501 antioxidant content assay" is divided into four parts.
--- Part 1. Spectrophotometry;
--- Part 2. Liquid chromatography;
--- Part 3. Infrared spectroscopy;
--- Part 4. GC/MS.
This section GB/T 7602 Part 4.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This section uses the redrafted law reference IEC 60666.2010 "Qualitative and quantitative detection of specific additives in mineral insulating oil" in
3.4 The degree of conformity with IEC 60666.2010 is not equivalent.
This part is proposed by China Electricity Council.
This part of the National Electrochemical Standardization Technical Committee (SAC/TC322) centralized.
This section drafted unit. Guangdong Power Grid Co., Ltd. Electric Power Research Institute, China Petroleum Lanzhou Lubricant Research and Development Center, West
An Thermal Research Institute Co., Ltd., Guangzhou Power Supply Bureau Electric Power Research Institute Ltd., Guangdong Power Grid Co., Ltd. Zhuhai Power Supply Bureau.
1 Scope
GB/T 7602 provisions of this part of the transformer oil, turbine oil added T501 (2,6-di-tert-butyl p-cresol) antioxidant containing
Quantitative gas chromatography - mass spectrometry method.
This section applies to unused and in operation transformer oil, turbine oil T501 antioxidant content determination.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.
Electric power oil (mineral insulating oil, turbine oil) sampling method
3 Method summary
This section uses the T501 antioxidants after the transformer oil and turbine oil mass spectrum 205,220 signal peaks appear, and
The peak intensity of this signal is proportional to the concentration of T501. By plotting the standard curve, the T501 in transformer oil and turbine oil
Content, the results with the concentration (%) said.
4 reagents and materials
Iso-octane. Analytical pure.
4.2 2,6-Di-tert-butyl-p-cresol (DBPC, T501). Analytical purity.
4.3 Dimethyl Phthalate (DMP). Analytical purity.
4.4 Blank oil T501-free mineral insulating oil or turbine oil.
4.5 syringe filter membrane .0.45µm, PTFE material.
4.6 syringe .2.5 mL.
4.7 centrifuge tube .50mL.
4.8 Helium - Purity not less than 99.99%.
5 instruments
5.1 gas chromatograph
5.1.1 injection device. With the sample vaporization, diversion and collection of residual oil function.
5.1.2 Capillary column .5% phenylpolysiloxane and 95% methylpolysiloxane stationary phase, length 30m, inner diameter 0.25mm, film thickness
0.25 µm.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 11 pages — is available in the English PDF.
Referenced standards
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Related Standards
GB/T 7602.3-2008 — Determination of T501 oxidation inhibitor content in transformer oil or turbine oil - Part 3: Infrared spectroscopy method
GB/T 7602.2-2008 — Determination of T501 oxidation inhibitor content in transformer oil or turbine oil - Part 2: Liquid chromatography
GB/T 7602.1-2008 — Determination of T501 oxidation inhibitor content in transformer oil or turbine oil - Part 1: Spectrophotometric method
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