SN/T 5262-2020 in English

VALID

Determination of individual aromatic and total aromatics in imported mixed aromatics-Didimensional gas chromatography

Issued on:2020-08-27
Implemented on:2021-03-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $220.00
$214.00

Standard No:	SN/T 5262-2020
Document status:	VALID
Title in English:	Determination of individual aromatic and total aromatics in imported mixed aromatics-Didimensional gas chromatography
Title in Chinese:	进口混合芳烃中各芳烃含量和总芳烃含量的测定二维气相色谱法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2020-08-27
Implemented on:	2021-03-01
Professional Classification:	SN-Import&Export Inspection
Related Keywords:	mixed aromatics-didimensional gas chromatography introduction technical background mixed aromatics two-dimensional gas chromatography technology total aromatics mixed standard sample
Related Topics:	Aromatics Aroma content Imported gas chromatograph Polar column Polar column Import gas phase Imported gas chromatograph Injection port two-dimensional gas phase Chromatographic detector fid hydrocarbon total hydrocarbon content Measurement of total hydrocarbons Hydrocarbon content Hydrocarbon content Gas chromatography inlet Density of total hydrocarbons total hydrocarbon content Internal standard content total hydrocarbon two-dimensional chromatography Aromatic content two-dimensional gas phase Atmospheric Total Hydrocarbons non-polar column Total Mercury Content in Liquid Hydrocarbons atmospheric hydrocarbon content Total blend content Olefin and Aromatic Content What is the total hydrocarbon content Total Petroleum Hydrocarbons Aromatic Hydrocarbons Total Hydrocarbons in Water by Chromatography Total Petroleum Hydrocarbon Content Total Aromatic Hydrocarbons in Water two-dimensional phase two-dimensional chromatography Total voc content in the air pca aromatics Aromatics Infrared Spectroscopy Import each , total hydrocarbon content Gas phase hydrocarbon content two-dimensional chromatography total hydrocarbons in water two-dimensional chromatography Total Aromatics and Total Saturated Hydrocarbons in Lubricant Base Oils System Chromatography total chemical hydrocarbon Content by gas chromatography Two-dimensional gas chromatography Chromatography of Total Hydrocarbons in Water hplc hydrocarbons and hydrocarbons Injection port total hydrocarbon Total Chlorine in PAHs Gas phase relative content Aromatics content analysis total hydrocarbon molecular weight Determination of total hydrocarbon content in petroleum Total Hydrocarbon Content of Petroleum Aromatic content, olefin content Aromatic content Carbon content Hydrocarbon amount Total Petroleum Hydrocarbon Aromatic Content Molecular weight of total hydrocarbons total hydrocarbons in air True 2D Gas Chromatography Total blend content semi-quantitative relative content Total powder content Chromatographic fid detector reverse chromatography english 2D peak reverse chromatography english Determination of Total Petroleum Hydrocarbons by Gas Chromatography PAH Gas Chromatograph Gas phase sample content Determination of Total Petroleum Hydrocarbons by Gas Chromatography Aromatics Gas Chromatograph Imported chromatography Chromatographic fid detector total hydrocarbon hd Calixarene 2D peak Infrared Spectra of Aromatic Hydrocarbons heavy aromatics Naphthalene content in aromatics Chromatographic mixture total hydrocarbon water peak Total gas content measurement Total Hydrocarbon Gas Chromatograph Total powder + content The content of each component in total nitrogen Chromatography system Chromatographic analysis of aromatics trace heavy aromatics in water gas phase inlet Gas Chromatography Polycyclic Aromatic Hydrocarbons Typical Chromatography Hydrocarbon Chromatography in Water Aromatics infrared Various data of gas chromatography Chromatographic detector fid Middle aromatics Fluoroaromatic hydrocarbons Coal to Aromatics Internal standard content Aromatics Chromatography Gas phase detection content Petroleum total hydrocarbon gas phase Peaks behind total hydrocarbons Toluene aromatics content Petroleum total hydrocarbon gas phase Toluene aromatics content Aryl hydrocarbon receptor Aryl hydrocarbon receptor pca aromatics Mixed aromatics Mixed aromatics Air content of various gases How to measure aromatics content Imported gas chromatography Total Petroleum Hydrocarbon Detection Chromatography Gas Chromatography Aromatics Oxygen content by province Aromatics Infrared Spectroscopy Aromatics infrared Aromatic total chlorine fang Detection of Polycyclic Aromatic Hydrocarbons by Gas Chromatography Gas Chromatography Total Hydrocarbon Column Hydrocarbon gas total nitrogen total nitrogen in hydrocarbons Total Hydrocarbon Abroad Infrared Spectroscopy Aromatics Petroleum hydrocarbon content in water Spectrum of Aromatics Aromatic Platinum Cobalt Gas phase detection of polycyclic aromatic hydrocarbons total hydrocarbon molecular weight Imported gas chromatograph Two-dimensional gas chromatography Total Gas Content Total Hydrocarbons and Total Hydrocarbons Total Petroleum Hydrocarbons and Aromatic Hydrocarbons Total Hydrocarbons Measurement of Aromatics Determination of Aromatic Hydrocarbons in Hydrocarbons by Gas Chromatography total hydrocarbon content in liquid air Hybrid Chromatography Total hydrocarbon content analysis Aromatic Hydrocarbon Chromatography-Mass Spectrometry Total Hydrocarbon Gas Chromatograph Total Petroleum Hydrocarbon Measurement Determination of Polycyclic Aromatic Hydrocarbons in Water by Gas Chromatography Aromatics and Plastics content in zero air Determination of Aromatics Content in Hydrocarbons by Gas Chromatography Oxidation of Aromatics How Chromatography Performs Assay Naphthalene aromatics PAH content in raw plastics Metallic elements in aromatics Determination of hydrocarbon content by gas chromatography normalization method aromatics fid response How to determine the content of each component using gas chromatography 2D chromatogram Regulations on total hydrocarbon content in air separation Sampling methods for total hydrocarbons in the air Method for determination of polycyclic aromatic hydrocarbons by gel chromatography Total aromatic hydrocarbon content of petroleum Total petroleum hydrocarbon content detection Method for determination of polycyclic aromatic hydrocarbons by gas chromatography Aromatic hydrocarbon gas analysis Total hydrocarbon content test Test method for alloy second phase content Diolefin content test method Detection of Aromatic Hydrocarbon Content of Alkane Solvents Aromatic hydrocarbon gas explosion-proof content Determination of aromatic hydrocarbon content Carbon content of various types of electricity Gas chromatography method for detecting aromatic hydrocarbons Aromatic hydrocarbon resistance testing Aromatics industry Aromatic hydrocarbon quality Mixed aromatics mass National quality of mixed aromatics Total aromatics of near-infrared diesel fuel Industrial Aromatic Total Nitrogen Aromatic content of crude oil

Introduction

Technical background and scope of application of the standard

This standard aims at the quality control requirements of key components such as benzene and toluene in imported mixed aromatics, and adopts two-dimensional gas chromatography technology to solve the technical problem that traditional methods cannot separate meta-xylene and para-xylene. It is applicable to the detection scenario of 10%-100% total aromatic content.

Core method principle

Analysis phase	Valve switching time	Detection target	Chromatographic column combination
First analysis	0.8min on, 14.5min off	Benzene, toluene	TCEP polar pre-column + methyl silicone analytical column
Second analysis	4.3min on, 22min off	C8-C9+aromatics	Same as the first analysis column system

Typical case: In the detection of a batch of imported mixed aromatics, the valve switching time was optimized (±0.1min) to increase the separation degree of meta-xylene/para-xylene from 1.2 to 1.8, meeting the quantitative requirements.

Key instrument configuration requirements

Gas chromatograph: Must be equipped with a ten-port valve switching system with a dead volume of <5μL
Chromatographic column: Polar pre-column requires 20% TCEP stationary phase, non-polar column film thickness requires 0.5μm
Detector: FID detector temperature should be stable at 300±1℃

Key points of quality control

Parameters	Requirements	Verification method
Standard curve R²	≥0.990	5-point linearity verification
Repeatability (r)	≤1% relative value	6 parallel determinations
Sample storage	0-5℃ protected from light	Temperature record verification

Implementation suggestions

Establish a valve switching time calibration procedure. It is recommended to use xylene mixed standard sample for weekly verification
When quantifying C9+ aromatics, it is recommended to use 1,2,4-trimethylbenzene as the representative component
Density conversion should adopt the SH/T 0604 method to measure the sample density

More samples: DL/T 368-2010 JGJ 94-2008 QC/T 942-2021

Sample only — not a preview of SN/T 5262-2020

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