GB/T 3392-2023 (English Version)

Standard No.: GB/T 3392-2023
Language: Chinese, Available in English version
Release Date: 2023
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 3392-2023
Replace: GB/T 3392-2003

Scope: This document specifies the determination of industrial propylene purity and hydrocarbon impurities by gas chromatography, including methane, ethane, ethylene, propane, cyclopropane, isobutane, n-butane, propadiene, acetylene, trans-2-butene, 1-butene, isobutylene, cis-2-butene, 1,3-butadiene, methylacetylene, etc. This document is applicable to the determination of industrial propylene with a purity greater than 98% (volume fraction) and a hydrocarbon impurity content of not less than 1~mL/m³.

Introduction

1. Standard Overview

GB/T3392-2023 "Gas Chromatographic Method for the Determination of Hydrocarbon Impurities in Industrial Propylene" is an important update of the national standard, replacing the previous GB/T3392-2003 version. This standard mainly stipulates the use of gas chromatography to detect hydrocarbon impurities in industrial propylene, including methane, ethane, ethylene and other components.

2. Background of Standard Revision

Since its first release in 1982, this standard has undergone several revisions to meet the needs of industrial development. This revision mainly focuses on the improvement of detection technology and the optimization of methods, especially reducing the detection limit of various hydrocarbon impurities, and adding quality assurance and control chapters.

3. Comparison of Technical Specifications

Project	GB/T3392—2003	GB/T3392—2023
Detection limit	≥1 mL/m³	≤1 mL/m³ (partial indicators)
Chromatographic column requirements	Specific parameters are not specified	Detailed provisions of chromatographic column parameters and operating conditions (see Table 1)
Detection method	Single gas chromatography method	Introduction of correction area normalization method and external standard method

4. Interpretation of detection methods

Corrected area normalization method:This method calculates the impurity content by the peak area ratio of the standard sample and the test sample. It is suitable for quantitative analysis of known impurity components.

External standard method:It uses external standards for quantitative analysis. It is easy to operate but relies on accurate standard samples.

5. Implementation suggestions

The laboratory should calibrate the instrument regularly to ensure that the performance of the chromatographic column and detector meets the requirements.
Operators need to undergo professional training and be familiar with the operation and data processing methods of gas chromatographs.
It is recommended to use standard substances for quality control to verify the accuracy of the test results.

GB/T 3392-2023 Referenced Document

GB/T 12701 Ethylene and propylene for industrial use.Determination of trace oxygenates.Gas chromatographic method
GB/T 13290 Propylene and butadiene for industrial use.Sampling in the liquid phase
GB/T 19186 Propylene for industrial use--Determination of oligomers--Gas chromatographic method
GB/T 3393 Ethylene and propylene for industrial use-Determination of trane hydrogen-Gas chromatographic method
GB/T 3394 Determination of trace amounts of carbon monoxide, carbon dioxide and acetylene in industrial ethylene and propylene by gas chromatography
GB/T 3396 Determination of trace oxygen in ethylene and propylene for industrial use—Electrochemical method
GB/T 3723 Sampling of chemical products for industrial use--Safety in sampling
GB/T 3727 Ethylene or propylene for industrial use--Determination of trace water
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values

GB/T 3392-2023 history

2023 GB/T 3392-2023 Determination of hydrocarbon impurities in propylene for industrial use by gas chromatography
2003 GB/T 3392-2003 Propylene for industrial use--Determination of hydrocarbon impurities gas chromatographic method
0000年 GB/T 3392-1991