9项关于水质、空气废气等测定的国家生态环境标准征求意见发布

Core Viewpoint - The article discusses the release of nine national ecological environment standard drafts for public consultation, focusing on detection methods for harmful substances such as pesticides, aniline compounds, and dioxins in water quality, air, and solid waste [1][2]. Group 1: Water Quality Standards - The draft for the determination of six amide pesticides and two aniline compounds in water quality using gas chromatography is the first of its kind [4]. - The standard specifies that the detection limits for the six amide pesticides and two aniline compounds are 0.002 mg/L, with a measurement limit of 0.008 mg/L when the sample volume is 100 mL and the final volume is 1.0 mL [5]. - A new standard for measuring the permanganate index in surface and groundwater using continuous flow-spectrophotometry has been introduced, with a detection limit of 0.08 mg/L and a measurement limit of 0.32 mg/L [6][9]. Group 2: Toxicity and Pesticide Measurement - The acute toxicity measurement standard using luminescent bacteria has been revised to include updated methodologies and definitions, ceasing the implementation of the previous standard from 1995 [10][12]. - A new standard for measuring six chlorinated phenoxycarboxylic acid herbicides and mefenacet using gas chromatography-mass spectrometry has been established, with detection limits of 0.3 µg/L and measurement limits of 1.2 µg/L [13][14]. Group 3: Organic Phosphorus Pesticides and Air Quality - The standard for measuring eight organic phosphorus pesticides using high-performance liquid chromatography-triple quadrupole mass spectrometry has been introduced, with detection limits ranging from 0.11 µg/L to 0.20 µg/L and measurement limits from 0.44 µg/L to 0.80 µg/L [19][21]. - A new standard for measuring ten acetate esters in environmental air and waste gas using solid adsorption-solvent desorption/gas chromatography has been released, with detection limits of 0.02 mg/m³ and measurement limits of 0.08 mg/m³ for air samples [22][23]. Group 4: Ammonia and Dioxin Measurement - The ammonia measurement standard in environmental air and waste gas using gas phase molecular absorption spectroscopy has been established, with detection limits of 0.02 mg/m³ and measurement limits of 0.08 mg/m³ for air samples [24]. - The dioxin measurement standard for solid waste using isotope dilution/high-resolution gas chromatography-high-resolution mass spectrometry has been revised, with detection limits for dioxins in solid waste ranging from 0.2 ng/kg to 1 ng/kg and measurement limits from 0.8 ng/kg to 4 ng/kg [25][28].