GB/T 44615-2024Determination of volatile organic compounds in soil of agricultural production area—Gas chromatography with dual columns (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting is required.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed by the Ministry of Agriculture and Rural Affairs of the People's Republic of China.

This document is under the jurisdiction of the National Technical Committee on Soil Quality Standardization (SAC/TC 404).

This document was drafted by: Zhejiang University of Science and Technology, China National Institute of Standardization, Jilin Product Quality Supervision and Inspection Institute, Hangzhou Xike Testing Technology Co., Ltd., Beijing Academy of Agriculture and Forestry Sciences, Shandong Zhongcheng Standard Information Technology Co., Ltd., Soil and Agricultural Rural Ecological Environment of the Ministry of Ecology and Environment Environmental Supervision Technology Center, Hangzhou Anhao Testing Technology Co., Ltd., and Shanghai University.

The main drafters of this document are: Liu Tiebing, Chu Qiao, Zhong Chunyan, Wang Zuoyi, Wang Haipeng, Du Wenbo, Shi Huading, Ju Peng, Li Kang, Dong Qiaoyan, Huang Xianfeng, Jiao Zheng, Li Zhen, Li Changhai, Tu Haiyun, Li Li, Sun Zaijin, Wu Yuanfeng, Zhu Yinbang, Ban Zhaojun.

Volatile organic compounds in soils of agricultural product production areas Detection method. Dual column gas chromatography

1 Scope

This document describes a gas chromatography method (dual-column gas chromatograph) for the determination of volatile organic compounds (VOCs) in soils from agricultural production areas. Spectrum method).

This document is applicable to the detection of volatile organic compounds such as halogenated hydrocarbons and aromatic hydrocarbons in agricultural product production areas and related soils.

2 Normative references

GB/T 6682

NY/T 395

NY/T 1121.1

3 Terms and definitions

The following terms and definitions apply to this document.

4 Principle

Volatile organic compounds in the soil of agricultural production areas are generated by environmental pollution and the use of agricultural inputs.

Under this condition, the volatile organic components in the sample in the headspace bottle are volatilized, and when the gas, solid and liquid phases reach thermodynamic dynamic equilibrium, the headspace is used to The sample is injected by a single or double needle of the sampler, separated by a double column of gas chromatography, and then enters the hydrogen flame detector (FID) and the electron capture detector (ECD) for detection.

Measure and record them separately, use retention time for qualitative analysis and external or internal standard for quantitative analysis, and calculate the content of the target compound.

5 Reagents and Materials