SN/T 5264-2020 in English

VALID

Determination of 14 trace oxygenates in naphtha-Deans switch-didimensional capillary gas chromatography method

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

Price(USD)： $180.00
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Standard No:	SN/T 5264-2020
Document status:	VALID
Title in English:	Determination of 14 trace oxygenates in naphtha-Deans switch-didimensional capillary gas chromatography method
Title in Chinese:	石脑油中14种微量含氧化物的测定中心切割-二维毛细管气相色谱法
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:	naphtha-deans switch-didimensional capillary gas chromatography method introduction analysis synergistic separation core method principle trace oxygenates pre-column separation stage carrier gas pressure
Related Topics:	Chromatographic heart cutting Gas Chromatography Heart Cutting Vapor phase heart cutting Various Capillary Columns for Gas Chromatography Determination of Carbon Dioxide Content in Water by Gas Chromatography Determination of organic oxygenates and benzene in gasoline by two-dimensional heart-cutting gas chromatography heart-cut chromatography Heart Cut Gas Phase Vapor phase heart cutting Heart-cutting gas chromatography National Testing Center Trace capillary micropipette tip Chromatographic peak Gas Chromatography Capillary heart-cut chromatography capillary oil System Chromatography capillary gas chromatography Capillary in mass spectrometry capillary system Gas Chromatography Heart Cutting Central 2D Chromatography gas capillary Heart cutting in gas chromatography Center Cut Blowing True 2D Gas Chromatography Oxygenated compounds in naphtha Two-dimensional gas chromatograph Heart-cutting gas chromatography Heart Cut 2D heart cutting time 2D peak brain matter 2D peak capillary gas chromatography Heart cutting in vapor phase Heart-cutting Gas Chromatography Chromatography system Capillary column cutting cutting time Several Quantitative Methods of Gas Phase Compound composition Typical Chromatography non-centrosomal microtubules center cut english gas phase cutting centrosome microtubules centrosome microtubules capillary system Center 2D China National Petroleum Corporation Center height of microcuvette Heart-cutting gas chromatography 2D Gas Chromatography Heart Cutting Gas in Petroleum in Gas Chromatography 2D Vapor Phase Heart Cutting GC Precut Gas Chromatography Heart-Cutting Method Petroleum in gas phase gas capillary Quartz capillary cutter What is the capillary voltage in mass spectrometry? Determination of oil content in cutting fluid Quartz capillary cutting method Gas Chromatography Capillary Performance Testing Oxide content in petroleum coke Heart-cutting gas chromatography analysis method

Introduction

Analysis of Standard Technology Evolution

This standard replaces the 1997 version of SN/T 0654. The main technical upgrades are reflected in:

Comparison dimensions	1997 version	2020 version
Number of detected compounds	8	14
Detection technology	Conventional GC	Heart-cutting-2D GC
Lower limit of quantification	2 mg/kg	0.4 mg/kg
Separation efficiency	Single column separation	Dual column synergistic separation

Core method principle

Two-dimensional separation is achieved by using microfluidic plate heart-cutting system:

Pre-column separation stage: Non-polar pre-column (30m×530μm) is used to initially separate light hydrocarbon components
Heart-cutting stage: Switch to the analytical column (Lowox column) at t1=1.05min
Backflush stage: t2=3.10min to vent the heavy hydrocarbon components

Key instrument configuration

Typical chromatographic condition case: Shenzhen Customs Laboratory uses Agilent 7890B system, equipped with FID detector (250°C), carrier gas pressure 55 kPa, split ratio 2:1, column temperature program 50°C (1 min) → 10°C/min → 250°C (4 min).

Key points of quality control

Control items	Requirements
Stability of standard solution	Prepare and use immediately (especially alcohols)
Retention time deviation	≤±0.05min
Repeatability limit (2mg/kg)	0.2-0.5mg/kg

Implementation suggestions

Chromatographic column aging: New columns need to be aged at 250℃ for more than 12 hours

Cutting time calibration: It is recommended to verify t1/t2 with ethyl tert-butyl ether standard every week

Sample storage: Store at 0-5℃ away from light, and complete the test within 24 hours after opening

More samples: GB 50021-2001(2009) JC/T 2453-2018 YD/T 3934-2021

Sample only — not a preview of SN/T 5264-2020

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