公开(公告)号：US4657639A

公开(公告)日：1987-04-14

申请号：US740107

申请日：1985-05-31

Applicant: Parameswar Mahadevan ,  Elfreda T. Chang ,  Peter Breisacher

Inventor： Parameswar Mahadevan ,  Elfreda T. Chang ,  Peter Breisacher

IPC: B03C3/28 ,  C01B21/36 ,  B01D3/00 ,  B01D13/02 ,  B01D46/00

CPC classification number: B03C3/28 ,  C01B21/36 ,  Y10S203/02 ,  Y10S55/39

Abstract: An electrostatic filtration apparatus is used to significantly reduce contaminants in N.sub.2 O.sub.4 vapor and liquid at ambient temperatures. The apparatus uses an electret vapor filter having therein a stack of layers of electret material through which the N.sub.2 O.sub.4 must pass. A flow blocking filter is added to the electret liquid filter to insure a sufficient time for removal of contaminants by said electret material. The filter is constructed of chemically inert materials to prevent additional contaminants.

Abstract translation: 静电过滤装置用于在环境温度下显着降低N2O4蒸气和液体中的污染物。 该装置使用驻极体蒸汽过滤器，其中具有一层由驻极体材料层叠的N2O4必须通过的过滤器。 向驻极体液体过滤器中加入阻流过滤器，以确保足够的时间去除所述驻极体材料中的污染物。 过滤器由化学惰性材料构成，以防止其他污染物。

公开(公告)号：US3944834A

公开(公告)日：1976-03-16

申请号：US512338

申请日：1974-10-04

Applicant: Raymond L. Chuan ,  Parameswar Mahadevan ,  Daryl J. Bergquist

Inventor： Raymond L. Chuan ,  Parameswar Mahadevan ,  Daryl J. Bergquist

IPC: G01N21/27 ,  G01N21/64 ,  G01D18/00 ,  G01J1/42 ,  G01N21/38

CPC classification number: G01N21/278 ,  G01N21/276 ,  G01N21/64 ,  G01N2021/6482 ,  G01N21/645 ,  G01N2201/128 ,  G01N2201/1286

Abstract: The embodiment of the pollution monitor described in the specification uses the principle of ultraviolet-induced fluorescence to detect and measure gaseous pollution in air, smokestack exhaust and other fluids. Improved calibration or standardization is effected by the use of one or more calibration cells in which a non-gaseous material simulates the fluorescence of the gaseous species under investigation, by scattering the incident ultraviolet light into a spectral region similar to that of the fluorescence of the gaseous species. Examples of suitable materials have been found to be aluminum, gold, platinum and molybdenum, all of which scatter light in the appropriate spectral region at a level which stays substantially constant with time.In the preferred embodiment, the sample cell and the calibration cells are all formed in a single cell block by drilling holes into solid bar material which holes function as the individual cell cavities. The sample cell has ports for the flow of sample gas therethrough, while in each of the calibration cells, the metallic material is mounted to intercept and scatter the incident ultraviolet light energy. The cell block is constructed to rotate so that the several cells can be individually aligned in the light path between the ultraviolet source and fluorescence detector.

Abstract translation: 本说明书中描述的污染监测器的实施例使用紫外线诱发荧光的原理来检测和测量空气，烟囱排气和其它流体中的气体污染。 通过使用一种或多种校准单元来实现改进的校准或标准化，其中非气态材料通过将入射的紫外光散射到类似于荧光的光谱区域中来模拟所研究的气态物质的荧光， 气态物种。 已经发现合适的材料的实例是铝，金，铂和钼，所有这些材料都以适当的光谱区域中的光散射在与时间基本恒定的水平上。