公开(公告)号：US5983732A

公开(公告)日：1999-11-16

申请号：US44854

申请日：1998-03-20

Applicant: Susanne V. Hering ,  Mark R. Stolzenburg

Inventor： Susanne V. Hering ,  Mark R. Stolzenburg

IPC: G01N1/02 ,  G01N1/00 ,  G01N1/22 ,  G01N1/24 ,  G01N1/28 ,  G01N15/00 ,  G01N21/76 ,  G01N30/12 ,  G01N33/00

CPC classification number: G01N1/2214 ,  G01N15/00 ,  G01N33/0016 ,  G01N1/2202 ,  G01N1/2208 ,  G01N1/24 ,  G01N2001/2223 ,  G01N2015/0046 ,  G01N2030/128

Abstract: An integrated collection and vaporization cell apparatus has a collector and vaporizer cell for collecting airborne particles from sample gas on a collector strip in the cell and a power source connected to the strip for rapidly heating the strip and converting the particles to vapors for analysis without need of removing the strip from the cell. A sample gas director connected to the cell directs sample gas and particles to the collector strip. Particles are collected on the strip by impaction. Rapid heating of the strip vaporizes the particles. A carrier gas flowed into the cell through the director and directly into the cell through a port directs the vapors from the cell to an analyzer port. A measurer connected to the analyzer port measures the amount of vapors and elemental constituents obtained from vaporization of the particles. A humidifier is provided to increase particle collection efficiency. A pre-impactor and denuder are provided to remove large particles and compounds from the sample gas before analysis. A vented housing around the pre-impactor, denuder, humidifier and cell maintains sample gas temperature near ambient temperature. The sample conduit is free of valves.

Abstract translation: 集成收集和蒸发池装置具有收集器和蒸发器单元，用于从单元中的收集器条上的样品气体收集空气中的颗粒，以及连接到条带的电源，用于快速加热条带并将颗粒转化成蒸气以进行分析，而不需要 从细胞中移除条带。 连接到电池的样品气体导向器将样品气体和颗粒引导到收集器条。 颗粒通过冲击收集在带上。 带的快速加热使颗粒蒸发。 通过引导器流入电池的载气通过端口直接进入电池，将蒸气从电池引导到分析器端口。 连接到分析器端口的测量器测量从颗粒蒸发获得的蒸气和元素成分的量。 提供加湿器以增加颗粒收集效率。 提供预冲击器和剥蚀器，以在分析前从样品气体中除去大颗粒和化合物。 预冲击器，分解器，加湿器和电池周围的通风外​​壳保持接近环境温度的样品气体温度。 样品导管没有阀门。

公开(公告)号：US20220128445A1

公开(公告)日：2022-04-28

申请号：US17568940

申请日：2022-01-05

Applicant: Aerosol Dynamics Inc.

Inventor： Susanne Vera Hering ,  Gregory Stephen Lewis ,  Steven Russel Spielman

IPC: G01N15/06

Abstract: A method and apparatus to create water vapor supersaturation and particulate counts from an air sample. The method and apparatus include introducing an air sample into a chamber connected to an optical detector and an outlet by pumping at the outlet. The method further includes passing air through the chamber and optical detector in a steady flow, and subsequently closing the inlet while continuing the pumping to expand the air sample and exhaust a portion of the air sample through the optical detector. The walls of the particle chamber are wetted with a fluid such as water, and one portion of the wall is warmer than the other portions such that there is some condensational growth prior to the expansion, and yet more condensational growth during the expansion. The cycles are repeated by continuously repeating the introducing, passing and closing.

公开(公告)号：US10883910B2

公开(公告)日：2021-01-05

申请号：US16372643

申请日：2019-04-02

Applicant: AEROSOL DYNAMICS INC.

Inventor： Susanne Vera Hering ,  Steven Russel Spielman ,  Gregory Stephen Lewis

IPC: G01N15/06 ,  G01N15/02 ,  G01N15/00

Abstract: An apparatus and method for condensationally enlarging particles in a flow of air or other gas. The apparatus includes a coiled tube having a tube diameter and a coil diameter, the tube having an input receiving the flow and an output, the tube having a length between the input and the output. The walls of the tube are wetted with a condensing fluid. The walls of the first portion of the coiled tube are held a temperature that is lower than the highest temperature in the second portion of the tube. The tube may have a third vapor recovery portion with wall temperature lower than the highest temperature in the second portion, and which optionally may not be coiled. While heating and cooling, the method includes introducing a flow into an interior of the tube at an input, the flow moving the output.

公开(公告)号：US20190224637A1

公开(公告)日：2019-07-25

申请号：US16372677

申请日：2019-04-02

Applicant: AEROSOL DYNAMICS INC.

Inventor： Susanne Vera Hering ,  Steven Russel Spielman ,  Gregory Stephen Lewis

IPC: B01J8/08 ,  G01N15/06 ,  B01D5/00

Abstract: An apparatus and method for creating enlarged particles in a flow. The apparatus includes a coiled tube having a tube diameter and a coil diameter, the tube having an input receiving the flow and an output, the tube having a length between the input and the output. A heater heats a first portion of the tube along a first, longitudinal portion of the tube, and a cooler cools a second, longitudinal portion of the tube along at least a second portion of the tube. The method includes heating a first portion of the tube along a first longitudinal portion of the tube, and simultaneously cooling a second portion of the tube along at least a second longitudinal portion of the tube. While heating and cooling, the method includes introducing a flow into an interior of the tube at an input, the flow moving the output.

公开(公告)号：US09028775B2

公开(公告)日：2015-05-12

申请号：US13246608

申请日：2011-09-27

Applicant: Susanne Vera Hering ,  Gregory Stephen Lewis ,  Steven Russel Spielman ,  Charles Sherman Henry ,  Scott Douglas Noblitt ,  Jeffrey Lee Collett, Jr.

Inventor： Susanne Vera Hering ,  Gregory Stephen Lewis ,  Steven Russel Spielman ,  Charles Sherman Henry ,  Scott Douglas Noblitt ,  Jeffrey Lee Collett, Jr.

IPC: B01L5/00 ,  G01N27/453 ,  G01N35/08 ,  G01N1/22 ,  G01N27/447

CPC classification number: G01N35/08 ,  G01N1/2208 ,  G01N27/44743 ,  G01N27/44791 ,  G01N2001/2223

Abstract: This technology is a method and apparatus for the semi-continuous measurement of the concentration of constituents of airborne particles which couples a laminar flow, water condensation particle collector to a microfluidic device for assay of particle chemical composition by electrophoresis. The technology has been used for the assay of sulfates, nitrates, chlorides, and organic acids contained in fine and submicrometer atmospheric particles. For these compounds the apparatus and method described is capable of one-minute time resolution at concentrations at the level of micrograms of analyte species per cubic meter of air. Extension to other analytes is possible.

Abstract translation: 该技术是用于半连续测量空气传播颗粒的组分浓度的方法和装置，其将层流水凝缩颗粒收集器耦合到微流体装置，以通过电泳测定颗粒化学组成。 该技术已被用于测定精细和亚微米大气颗粒中所含的硫酸盐，硝酸盐，氯化物和有机酸。 对于这些化合物，所描述的装置和方法能够在每立方米空气的分析物质的微克级的浓度下进行一分钟的时间分辨。 扩展到其他分析物是可能的。

公开(公告)号：US20140029154A1

公开(公告)日：2014-01-30

申请号：US14043662

申请日：2013-10-01

Applicant: Aerosol Dynamics Inc.

Inventor： Susanne Vera Hering ,  Steven Russel Spielman ,  Gregory Stephen Lewis

IPC: B03C3/38

CPC classification number: B03C3/38 ,  B01D5/0009 ,  B01D53/002 ,  B01D53/1475 ,  B01D2257/504 ,  G01N15/065 ,  G01N2015/0038 ,  G01N2015/1481

Abstract: A particle charging method and apparatus are provided. An ion source is applied to a particle laden flow. The flow is introduced into a container in a laminar manner. The container has at least a first section, a second section and a third section. The first section includes wetted walls at a first temperature. A second section adjacent to the first section has wetted walls at a second temperature T2 greater than the first temperature T1. A third section adjacent to the second section has dry walls provided at a temperature T3 equal to or greater than T2. Additional water removal and temperature conditioning sections may be provided.

Abstract translation: 提供了一种粒子充电方法和装置。 将离子源施加到载满颗粒的流。 将流体以层流方式引入容器中。 容器至少具有第一部分，第二部分和第三部分。 第一部分包括第一温度下的湿壁。 与第一部分相邻的第二部分具有大于第一温度T1的第二温度T2的湿壁。 与第二部分相邻的第三部分具有设置在等于或大于T2的温度T3的干壁。 可以提供额外的除水和温度调节部分。

公开(公告)号：US12111241B2

公开(公告)日：2024-10-08

申请号：US17568940

申请日：2022-01-05

Applicant: Aerosol Dynamics Inc.

Inventor： Susanne Vera Hering ,  Gregory Stephen Lewis ,  Steven Russel Spielman

IPC: G01N15/06 ,  G01N15/075

CPC classification number: G01N15/06 ,  G01N15/075

Abstract: A method and apparatus to create water vapor supersaturation and particulate counts from an air sample. The method and apparatus include introducing an air sample into a chamber connected to an optical detector and an outlet by pumping at the outlet. The method further includes passing air through the chamber and optical detector in a steady flow, and subsequently closing the inlet while continuing the pumping to expand the air sample and exhaust a portion of the air sample through the optical detector. The walls of the particle chamber are wetted with a fluid such as water, and one portion of the wall is warmer than the other portions such that there is some condensational growth prior to the expansion, and yet more condensational growth during the expansion. The cycles are repeated by continuously repeating the introducing, passing and closing.

公开(公告)号：US11789166B2

公开(公告)日：2023-10-17

申请号：US16911368

申请日：2020-06-24

Applicant: Aerosol Dynamics Inc.

Inventor： Susanne Vera Hering ,  Gregory Stephen Lewis ,  Steven Russel Spielman ,  Mark R. Stolzenberg

IPC: G01N15/02 ,  G01T1/17 ,  G01T1/172 ,  G01N15/06 ,  G01N15/14

CPC classification number: G01T1/171 ,  G01N15/0205 ,  G01N15/0211 ,  G01N15/065 ,  G01N15/1459 ,  G01T1/172

Abstract: An approach for counting particles suspended in a flow of gas or liquid in instruments that direct the flow through an illuminated region. Pulses are detected when the signal is below a threshold amplitude and moves above the threshold amplitude. This movement above the threshold creates a dead time during which only one pulse is detected until the signal amplitude moves sufficiently below the threshold such that a subsequent particle creates a distinct pulse. After counting the number of pulses, and determining the measured live time that the signal is below the threshold value, an initial particle concentration is calculated, and the calculation corrected for coincidence by calculating an actual live time as a measured live time minus a constant multiplied by the number of distinctly counted pulses, where the constant has the units of time. From this, particle concentrations in a volume can be determined.

公开(公告)号：US11733148B2

公开(公告)日：2023-08-22

申请号：US16775033

申请日：2020-01-28

Applicant: Aerosol Dynamics Inc.

Inventor： Gabriel Isaacman-VanWertz ,  Nathan M. Kreisberg ,  Susanne V. Hering

IPC: G01N15/14 ,  G01N15/10

CPC classification number: G01N15/1404 ,  G01N2015/105

Abstract: A method and apparatus for evaluating the chemical composition of airborne particles by sequentially collecting and analyzing airborne particles in-situ. The method includes: collecting particles; enlarging the particles through water condensation; accelerating the enlarged particles onto a surface to collect enlarged particles; and analyzing the enlarged particles by: isolating the surface; passing a carrier gas over the surface; heating the surface to thermally desorb collected particles into the carrier gas; transporting this evolved vapor into detectors; and assaying the evolved vapor as a function of a desorption temperature. The apparatus includes: a sample flow inlet; a condensational growth tube; a collection and thermal desorption (CTD) cell; a carrier gas source; a heater coupled to the CTD; one or more gas detectors; and a controller configured to operate valves, the heater, the growth tube, and the CTD cell in at least an in-situ sequential collection mode and analysis mode.

公开(公告)号：US11237091B2

公开(公告)日：2022-02-01

申请号：US16671594

申请日：2019-11-01

Applicant: Aerosol Dynamics Inc.

Inventor： Susanne Vera Hering ,  Arantzazu Eiguren Fernandez ,  Gregory Stephen Lewis ,  Steven Russel Spielman ,  Philip Bourgeois

IPC: F24F6/04 ,  G01N15/06

Abstract: A particle growth apparatus includes a temperature-controlled humidifier coupled to a water-based condensation growth system. The humidifier may include a tube of sulfonated tetrafluoroethylene-based fluoropolymer-copolymer and surrounded by a region containing water or water vapor. The apparatus includes a wetted wick and wick sensor in the condensation growth system, configured such that the gas sample flows through the sulfonated tetrafluoroethylene-based fluoropolymer-copolymer tube into the condensation growth system.