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GB/T 12688.9-2011: Test method of styrene for industrial use -- Part 9: Determination of trace benzene -- Gas chromatographic method
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| GB/T 12688.9-2011 | English | 229 |
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Test method of styrene for industrial use -- Part 9: Determination of trace benzene -- Gas chromatographic method
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GB/T 12688.9-2011
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Basic data | Standard ID | GB/T 12688.9-2011 (GB/T12688.9-2011) | | Description (Translated English) | Test method of styrene for industrial use -- Part 9: Determination of trace benzene -- Gas chromatographic method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G16 | | Classification of International Standard | 71.080.15 | | Word Count Estimation | 10,115 | | Date of Issue | 2011-05-12 | | Date of Implementation | 2011-11-01 | | Quoted Standard | GB/T 3723; GB/T 6680; GB/T 8170 | | Adopted Standard | ASTM D6229-2006, MOD | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 6 of 2011 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the gas chromatographic determination of trace industrial styrene benzene content. This section applies to industrial use styrene content in the range of 0. 2mg/kg ~ 100mg/kg Determination of benzene. | GB/T 12688.9-2011: Test method of styrene for industrial use -- Part 9: Determination of trace benzene -- Gas chromatographic method
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Test method of styrene for industrial use Part 9. Determination of trace benzene Gas chromatographic method.
ICS 71.080.15
G16
National Standards of People's Republic of China
Styrene Test Method for industrial use
Part 9. Determination of Trace Benzene
Gas chromatography
Part 9. Determinationoftracebenzene-
Issued on. 2011-05-12
2011-11-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 12688 "for industrial use - Test methods" is divided into the following sections.
--- Part 1. purity and hydrocarbon impurities - Gas chromatographic method;
--- Part 3. Determination of polymer content;
--- Part 4. Determination of the peroxide titration;
--- Part 5. Determination of total aldehyde titration;
--- Part 6. for industrial use - Determination of trace sulfur - Oxidative Microcoulometry;
--- Part 8. polymerization inhibitor (p - tert butyl catechol) determination of spectrophotometry;
--- Part 9. Trace Benzene by Gas Chromatography.
This section GB/T 12688 Part 9.
The partial modification (in English) "Standard Test Method for Trace Benzene hydrocarbon solvent by gas chromatography" With ASTMD6229-06, Part
Structural differences and points of ASTMD6229-06 see Appendix A.
This section compared with ASTMD6229-06 main technical changes as follows.
--- Detection range was adjusted to 0.2mg/kg ~ 100mg/kg;
--- Increased capillary flow control system;
--- Repeatability limit use of the provisions;
--- Normative references cited in our standards.
Appendix A of this section is an informative annex.
This part is proposed by the China Petroleum and Chemical Corporation.
This part of the National Standardization Technical Committee Petrochemical Chemical Technical Committee (SAC/TC63/SC4) centralized.
This section drafted by. China Petroleum & Chemical Corporation Shanghai Research Institute of Petrochemical.
The main drafters of this section. Li Wei, Pengzhen Lei, Li Jiwen.
Styrene Test Method for industrial use
Part 9. Determination of Trace Benzene
Gas chromatography
1 Scope
This section provides the determination of trace amounts of benzene styrene industrial gas chromatography.
This section applies to industrial use Determination of styrene content in the range of 0.2mg/kg ~ 100mg/kg of benzene.
This section is not intended to illustrate the safety problems associated with its use, the user has the responsibility to take appropriate safety and health practices and security
Certified to comply with the provisions of the relevant national regulations.
Note. Styrene monomer is flammable. When in contact with peroxide, an inorganic acid and aluminum chloride exothermic polymerization reaction occurs. high
Its concentration liquid styrene vapor on the eyes and respiratory system irritation there.
2 Normative references
The following documents contain provisions which, through reference GB/T 12688 in this section constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
GB/T 3723 Sampling of chemical products for industrial use General Safety (GB/T 3723-1999, ISO 3165. 1976, idt)
GB/T 6680 General rules for sampling liquid chemical products
GB/T 8170 repair value expressed about the rules and limit values \u200b\u200band judgment
3 PRINCIPLE OF THE METHOD
3.1 double-column series valve system
The appropriate amount of sample injected with two capillary column switching valve and a gas chromatograph, the sample first by a non-polar column, the components according to the boiling point
Isolated, after column octane outflow valve switching, the heavies cleaning and venting of benzene and lighter components cut polar capillary column, benzene and non-aromatic
Hydrocarbons separated effectively measure the peak area of \u200b\u200bbenzene with hydrogen flame ionization detector (FID), other than the standard method to calculate the concentration of benzene in mg/kg expressed.
3.2 Capillary Flow Control System
The appropriate amount of sample injected with central cutting technology and dual detector FID gas chromatograph, the sample first by a non-polar column, each group
Points separated by boiling point, determined according to the central cutting period benzene peak time, and cut extremely capillary columns, benzene and non-aromatics effective
Separation, after heavy component blowback venting, measuring the peak area of \u200b\u200bbenzene with hydrogen flame ionization detector (FID), other than the standard method to calculate the concentration of benzene,
In in mg/kg.
4 Reagents and materials
4.1 Carrier gas. nitrogen, purity (volume fraction) ≥99.995%, silica gel and molecular sieve 5A dried, purified.
4.2 Combustion gas (FID). hydrogen, purity (volume fraction) ≥99.99%.
4.3 assisting gas. air, oil, silica gel and molecular sieve 5A dried, purified.
4.4 Benzene. purity (mass fraction) of not less than 99.5%.
4.5 Styrene. purity (mass fraction) of not less than 99.7%, no benzene.
4.6 n-heptane. purity (mass fraction) of not less than 99%.
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