Standard No.:	HJ 77.2-2025
English Name:	Ambient air and flue gas—Determination of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans—Isotope dilution / high resolution gas chromatography-high resolution mass spectrometry
Chinese Name:	环境空气和废气 二噁英类的测定 同位素稀释/高分辨气相色谱-高分辨质谱法
Chinese Classification:	Z10    Environmental pollutant monitoring methods
Professional Classification:	HJ    Professional Standard - Environment
ICS Classification:	13.040.01 13.040.01    Air quality in general 13.040.01
Source Content Issued by:	MEE
Issued on:	2025-12-22
Implemented on:	2026-7-1
Status:	to be valid
Superseding:	HJ 77.2-2008 Ambient air and waste gas - Determination of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) - Isotope dilution HRGC-HRMS
Target Language:	English
File Format:	PDF
Word Count:	18500 words
Translation Price(USD):	555.0
Delivery:	via email in 1~5 business day

本标准规定了测定环境空气和废气中二噁英类的同位素稀释/高分辨气相色谱-高分辨质谱法。
本标准适用于环境空气和无组织排放监控点空气、固定污染源有组织排放废气中二噁英类的测定。
环境空气和无组织排放监控点空气采样量为500 m3（标准状态），定容体积为20 μL时，2,3,7,8-氯代二噁英类的方法检出限为0.003 pg/m3～0.03 pg/m3，测定下限为0.012 pg/m3～0.12 pg/m3。详见附录A。
固定污染源有组织排放废气采样量为2 m3（标准状态干烟气），定容体积为20 μL时，2,3,7,8-氯代二噁英类的方法检出限为0.000 6 ng/m3～0.007 ng/m3，测定下限为0.002 4 ng/m3～0.028 ng/m3。详见附录A。