10项涉及质谱测定方法的国家生态环境标准公开征求意见发布

Core Viewpoint - The Ministry of Ecology and Environment has released 10 national ecological environment standards for public consultation, covering monitoring methods for water quality, air quality, and soil, with feedback accepted until September 28, 2025 [1][2]. Group 1: Water Quality Standards - The standard for measuring 9 alkylphenol compounds and bisphenol A in water using gas chromatography-mass spectrometry is being introduced for the first time [3]. - The method detection limit for liquid-liquid extraction is between 0.003 μg/L and 0.009 μg/L, with a quantification limit of 0.012 μg/L to 0.036 μg/L [3][4]. - The standard for measuring electrical conductivity in water is also being introduced, applicable to surface water, groundwater, and wastewater [8][9]. Group 2: Air Quality Standards - A new standard for environmental air quality monitoring data coding has been proposed, detailing coding methods for monitoring points, equipment, and data resolution [5][6]. - The automatic monitoring system for air quality will have a standard for data collection and transmission, ensuring compatibility between monitoring stations and data platforms [7]. Group 3: Soil and Sediment Standards - A standard for measuring hexabromocyclododecane and tetrabromobisphenol A in soil and sediment using isotope dilution and liquid chromatography-triple quadrupole mass spectrometry is being introduced [18][19]. - The detection limits for these compounds in soil samples range from 0.06 μg/kg to 0.07 μg/kg, with quantification limits from 0.24 μg/kg to 0.28 μg/kg [19]. Group 4: Additional Standards - A standard for measuring 11 elements in seawater using online pre-treatment and inductively coupled plasma mass spectrometry is being proposed, applicable to seawater and saline surface water [15][16]. - The method detection limits for these elements range from 0.02 μg/L to 0.3 μg/L, with quantification limits from 0.08 μg/L to 1.2 μg/L [17].