A new aerosol sampler based on the original version of Aerosol Counterflow Two-Jets Unit (ACTJU) is described. The ACTJU collector, connected with a water-based Condensation Growth Unit (CGU) placed upstream of the ACTJU, accomplished the quantitative collection of fine and ultrafine aerosol particles down to a few nanometers in diameter. Condensation of water vapor in the CGU enlarges nanometer sized particles to larger sizes in the supermicrometer range and the formed droplets are then collected into water in the ACTJU collector. The continuous collection of aerosols with the CGU-ACTJU sampler allows for the time-resolved measurement of changes in the concentration of particulate constituents. Coupling of the CGU-ACTJU sampler with on-line detection devices allows in-situ automated analysis of water-soluble aerosol components with high time resolution of 1 s (e.g., FIA detection for nitrite or nitrate) or 1 h (e.g., IC detection with preconcentration step for inorganic anions). Under the optimum conditions (the air flow rate of 10 L min-1 and water flow rate of 1.5 mL min-1), the limit of detection (IC including the preconcentration) for particulate fluoride, chloride, nitrite, nitrate, sulphate and phosphate is 2.53, 6.64, 24.2, 16.8, 0.12 and 5.03 ng m-3, respectively. The apparatus is sufficiently robust for its application at routine monitoring of aerosol composition in real-time.

中文翻译：

---

用于分析细小和超细气溶胶的气溶胶采样器

描述了一种基于气溶胶逆流双喷嘴装置 (ACTJU) 原始版本的新型气溶胶采样器。ACTJU 收集器与放置在 ACTJU 上游的水基冷凝生长装置 (CGU) 相连，完成了直径小至几纳米的细和超细气溶胶颗粒的定量收集。CGU 中水蒸气的冷凝将纳米尺寸的颗粒放大到超微米范围内的更大尺寸，然后形成的液滴在 ACTJU 收集器中被收集到水中。使用 CGU-ACTJU 采样器连续收集气溶胶可以对颗粒成分浓度的变化进行时间分辨测量。CGU-ACTJU 采样器与在线检测设备的耦合允许以 1 秒（例如，FIA 检测亚硝酸盐或硝酸盐）或 1 小时（例如 IC 检测）的高时间分辨率对水溶性气溶胶成分进行原位自动分析与无机阴离子的预浓缩步骤）。在最佳条件下（空气流速为 10 L min-1，水流速为 1.5 mL min-1），颗粒氟化物、氯化物、亚硝酸盐、硝酸盐、硫酸盐和磷酸盐的检测限（IC 包括预浓度）分别为 2.53、6.64、24.2、16.8、0.12 和 5.03 ng m-3。该设备足够坚固，可用于实时实时监测气溶胶成分。在最佳条件下（空气流速为 10 L min-1，水流速为 1.5 mL min-1），颗粒氟化物、氯化物、亚硝酸盐、硝酸盐、硫酸盐和磷酸盐的检测限（IC 包括预浓度）分别为 2.53、6.64、24.2、16.8、0.12 和 5.03 ng m-3。该设备足够坚固，可用于实时实时监测气溶胶成分。在最佳条件下（空气流速为 10 L min-1，水流速为 1.5 mL min-1），颗粒氟化物、氯化物、亚硝酸盐、硝酸盐、硫酸盐和磷酸盐的检测限（IC 包括预浓度）分别为 2.53、6.64、24.2、16.8、0.12 和 5.03 ng m-3。该设备足够坚固，可用于实时实时监测气溶胶成分。