福建省南平市茫荡山2009年3~4月_gac_a

福建南平茫荡山用GAC测颗粒物中离子浓度。数据收集时间为2009年3~4月，地点为福建省南平市茫荡山。GAC（Gas-Aerosol-Collector）是本实验室自主开发的气体、气溶胶连续在线收集装置。此套装置利用气体和气溶胶扩散系数的差异，使用湿式环形扩散管（Wet Denuder）把大气中的气态污染物和气溶胶有效的分离，消除了采样时气态污染物和气溶胶之间的干扰，并在扩散管内收集气态污染组分（HF、HCl、HONO、SO2、WSOC、NH3等），然后使用蒸汽喷射原理采集气溶胶中的水溶性组分（阴阳离子组份：F-、Cl-、NO2-、SO42-、 NH4+、Na+、Ca2+、水溶性有机酸离子等），采集到的样品交替送到成分分析仪器进行样品分析，实现了气态污染物和气溶胶的连续收集和在线测量。GAC收集到的水溶液样品进入ICS-90（Dionex， 美国）型阴离子色谱仪即时分析，测定样品中的F-、Cl-、NO2-、NO3-、SO32-、SO42-共6种阴离子。

Ion concentrations in atmospheric particulate matter were measured using GAC at Mangdang Mountain, Nanping, Fujian Province. The data were collected from March to April 2009 at Mangdang Mountain, Nanping, Fujian Province. GAC (Gas-Aerosol-Collector) is a continuous online collection device for gases and aerosols independently developed by our laboratory. This apparatus utilizes the difference in diffusion coefficients between gases and aerosols, and uses a Wet Denuder to effectively separate gaseous pollutants and aerosols in the atmosphere, eliminating the interference between gaseous pollutants and aerosols during sampling. Gaseous pollutant components (including HF, HCl, HONO, SO₂, WSOC, NH₃, etc.) are collected within the denuder, and then water-soluble components in aerosols (anionic and cationic components: F⁻, Cl⁻, NO₂⁻, SO₄²⁻, NH₄⁺, Na⁺, Ca²⁺, water-soluble organic acid ions, etc.) are collected via the steam jet principle. The collected samples are alternately delivered to compositional analysis instruments for detection, realizing continuous collection and online measurement of gaseous pollutants and aerosols. Aqueous samples collected by GAC were immediately analyzed using an ICS-90 anion chromatograph (Dionex, USA), and six anions in the samples were determined: F⁻, Cl⁻, NO₂⁻, NO₃⁻, SO₃²⁻, and SO₄²⁻.