公开(公告)号：US5098451A

公开(公告)日：1992-03-24

申请号：US81913

申请日：1987-07-08

申请人： David P. Rounbehler ,  David P. Lieb ,  Eugene K. Achter ,  Gabor Miskolczy ,  Eugenie Hainsworth ,  Gregory J. Wendel

发明人： David P. Rounbehler ,  David P. Lieb ,  Eugene K. Achter ,  Gabor Miskolczy ,  Eugenie Hainsworth ,  Gregory J. Wendel

IPC分类号： G01N1/00 ,  G01N1/02 ,  G01N1/22 ,  G01N1/28 ,  G01N1/40 ,  G01N21/76 ,  G01N27/417 ,  G01N30/02 ,  G01N30/06 ,  G01N30/08 ,  G01N30/12 ,  G01N30/14 ,  G01N30/16 ,  G01N30/30 ,  G01N30/40 ,  G01N30/46 ,  G01N30/62 ,  G01N30/64 ,  G01N30/72 ,  G01N30/84 ,  G01N31/12 ,  G01N33/00 ,  G01N33/22 ,  G01V9/00

CPC分类号： G01N30/461 ,  G01N1/02 ,  G01N30/08 ,  G01N30/12 ,  G01N30/84 ,  G01N33/0057 ,  G01V9/007 ,  G01N1/2214 ,  G01N1/2226 ,  G01N1/28 ,  G01N1/40 ,  G01N2001/022 ,  G01N2001/028 ,  G01N2030/025 ,  G01N2030/065 ,  G01N2030/085 ,  G01N2030/121 ,  G01N2030/122 ,  G01N2030/123 ,  G01N2030/125 ,  G01N2030/126 ,  G01N2030/143 ,  G01N2030/167 ,  G01N2030/3007 ,  G01N2030/3046 ,  G01N2030/3053 ,  G01N2030/3061 ,  G01N2030/3069 ,  G01N2030/3076 ,  G01N2030/3084 ,  G01N2030/626 ,  G01N2030/642 ,  G01N2030/8405 ,  G01N21/76 ,  G01N30/14 ,  G01N30/40 ,  G01N30/62 ,  G01N30/72

摘要： A highly selective, sensitive, fast detection system and method are disclosed for detecting vapors of specific compounds in air. Vapors emanating from compounds such as explosives, or stripped from surfaces using heat and suction from a hand-held sample gun, are collected on surfaces coated with gas chromatograph (GC) material which trap explosives vapors but repel nitric oxide, then are desorbed and concentrated in one or more cold spot concentrators. A high speed gas chromatograph (GC) separates the vapors, after which specific vapors are decomposed in two pyrolyzers arranged in parallel and the resulting nitric oxide is detected. A low temperature pyrolyzer with silver produces NO from nitramines or nitrite esters; a high temperature pyrolyzer decomposes all explosives vapors to permit detection of the remaining explosives. Also disclosed is a series arrangement of pyrolyzers and gas chromatographs and an NO detector to time-shift detection of certain vapors and facilitate very fast GC analyses. The use of hydrogen as a carrier gas, plus unique collectors and concentrators, high speed heaters, NO detectors, and very fast, temperature-programmable GC's enhance selectivity, sensitivity and speed of detection.

摘要翻译： 公开了一种高选择性，灵敏，快速的检测系统和方法，用于检测空气中特定化合物的蒸气。 从化合物如爆炸物或从手持式样品枪吸取热量从表面剥离的蒸气被收集在涂有气相色谱（GC）材料的表面上，该气相色谱（GC）材料捕获爆炸物蒸气但排斥一氧化氮，然后被解吸和浓缩 在一个或多个冷点浓缩器中。 高速气相色谱仪（GC）分离蒸汽，之后特定的蒸汽在平行排列的两个热解器中分解，并检测到所产生的一氧化氮。 含有银的低温热解器由硝胺或亚硝酸酯产生NO; 高温热解器分解所有炸药蒸气，以便检测剩余的炸药。 还公开了热解器和气相色谱仪的串联布置和用于某些蒸气的时移检测的NO检测器，并且促进非常快速的GC分析。 使用氢气作为载气，加上独特的收集器和浓缩器，高速加热器，NO检测器和非常快速的温度可编程GC增强了选择性，灵敏度和检测速度。

公开(公告)号：US5551278A

公开(公告)日：1996-09-03

申请号：US81953

申请日：1987-07-08

申请人： David P. Rounbehler ,  Eugene K. Achter ,  David P. Lieb ,  David H. Fine ,  Eugenie Hainsworth ,  Alf L. Carroll ,  Gregory J. Wendell

发明人： David P. Rounbehler ,  Eugene K. Achter ,  David P. Lieb ,  David H. Fine ,  Eugenie Hainsworth ,  Alf L. Carroll ,  Gregory J. Wendell

IPC分类号： G01N1/00 ,  G01N1/02 ,  G01N1/22 ,  G01N1/28 ,  G01N1/40 ,  G01N21/76 ,  G01N27/417 ,  G01N30/02 ,  G01N30/06 ,  G01N30/08 ,  G01N30/12 ,  G01N30/14 ,  G01N30/16 ,  G01N30/30 ,  G01N30/40 ,  G01N30/46 ,  G01N30/62 ,  G01N30/64 ,  G01N30/72 ,  G01N30/84 ,  G01N31/12 ,  G01N33/00 ,  G01N33/22 ,  G01V9/00 ,  G01K19/00 ,  B01D15/08

CPC分类号： G01N30/461 ,  G01N1/02 ,  G01N30/08 ,  G01N30/12 ,  G01N30/84 ,  G01N33/0057 ,  G01V9/007 ,  G01N1/2214 ,  G01N1/2226 ,  G01N1/28 ,  G01N1/40 ,  G01N2001/022 ,  G01N2001/028 ,  G01N2030/025 ,  G01N2030/065 ,  G01N2030/085 ,  G01N2030/121 ,  G01N2030/122 ,  G01N2030/123 ,  G01N2030/125 ,  G01N2030/126 ,  G01N2030/143 ,  G01N2030/167 ,  G01N2030/3007 ,  G01N2030/3046 ,  G01N2030/3053 ,  G01N2030/3061 ,  G01N2030/3069 ,  G01N2030/3076 ,  G01N2030/3084 ,  G01N2030/626 ,  G01N2030/642 ,  G01N2030/8405 ,  G01N21/76 ,  G01N30/14 ,  G01N30/40 ,  G01N30/62 ,  G01N30/72

摘要： A highly selective, sensitive, fast detection system and method are disclosed for detecting vapors of specific compounds in air. Vapors emanating from compounds such as explosives, or stripped from surfaces using heat and suction from a hand-held sample gun, are collected on surfaces coated with gas chromatograph (GC) material which trap explosives vapors but repel nitric oxide, then are desorbed and concentrated in one or more cold spot concentrators, A high speed gas chromatograph (GC) separates the vapors, after which specific vapors are decomposed in two pyrolyzers arranged in parallel and the resulting nitric oxide is detected, A low temperature pyrolyzer with silver produces NO from nitramines or nitrite esters; a high temperature pyrolyzer decomposes all explosives vapors to permit detection of the remaining explosives, Also disclosed is a series arrangement of pyrolyzers and gas chromatographs and an NO detector to time-shift detection of certain vapors and facilitate very fast GC analyses, The use of hydrogen as a carrier gas, plus unique collectors and concentrators, high speed heaters, NO detectors, and very fast, temperature-programmable GC's enhance selectivity, sensitivity and speed of detection,

摘要翻译： 公开了一种高选择性，灵敏，快速的检测系统和方法，用于检测空气中特定化合物的蒸气。 从化合物如爆炸物或从手持式样品枪吸取热量从表面剥离的蒸气被收集在涂有气相色谱（GC）材料的表面上，该气相色谱（GC）材料捕获爆炸物蒸气但排斥一氧化氮，然后被解吸和浓缩 在一个或多个冷点浓缩器中，高速气相色谱仪（GC）分离蒸气，之后特定的蒸气在平行排列的两个热解器中分解，并检测到所产生的一氧化氮。具有银的低温热解器由硝酸盐产生NO 或亚硝酸酯; 高温热解器分解所有爆炸物蒸气以允许检测剩余的炸药。还公开了热解器和气相色谱仪的串联布置以及NO检测器对某些蒸气进行时移检测，并促进非常快速的GC分析。使用氢 作为载气，加上独特的收集器和浓缩器，高速加热器，NO检测器和非常快速的温度可编程GC增强了选择性，灵敏度和检测速度，

公开(公告)号：US5123274A

公开(公告)日：1992-06-23

申请号：US81915

申请日：1987-07-08

申请人： Alf L. Carroll ,  Gabor Miskolczy ,  Freeman W. Fraim ,  Eugene K. Achter ,  David P. Lieb

发明人： Alf L. Carroll ,  Gabor Miskolczy ,  Freeman W. Fraim ,  Eugene K. Achter ,  David P. Lieb

IPC分类号： G01N1/00 ,  G01N1/02 ,  G01N1/22 ,  G01N1/28 ,  G01N1/40 ,  G01N21/76 ,  G01N27/417 ,  G01N30/02 ,  G01N30/06 ,  G01N30/08 ,  G01N30/12 ,  G01N30/14 ,  G01N30/16 ,  G01N30/30 ,  G01N30/40 ,  G01N30/46 ,  G01N30/62 ,  G01N30/64 ,  G01N30/72 ,  G01N30/84 ,  G01N31/12 ,  G01N33/00 ,  G01N33/22 ,  G01V9/00

CPC分类号： G01N30/461 ,  G01N1/02 ,  G01N30/08 ,  G01N30/12 ,  G01N30/84 ,  G01N33/0057 ,  G01V9/007 ,  G01N1/2214 ,  G01N1/2226 ,  G01N1/28 ,  G01N1/40 ,  G01N2001/022 ,  G01N2001/028 ,  G01N2030/025 ,  G01N2030/065 ,  G01N2030/085 ,  G01N2030/121 ,  G01N2030/122 ,  G01N2030/123 ,  G01N2030/125 ,  G01N2030/126 ,  G01N2030/143 ,  G01N2030/167 ,  G01N2030/3007 ,  G01N2030/3046 ,  G01N2030/3053 ,  G01N2030/3061 ,  G01N2030/3069 ,  G01N2030/3076 ,  G01N2030/3084 ,  G01N2030/626 ,  G01N2030/642 ,  G01N2030/8405 ,  G01N21/76 ,  G01N30/14 ,  G01N30/40 ,  G01N30/62 ,  G01N30/72

摘要： A highly selective, sensitive, fast detection system and method are disclosed for detecting vapors of specific compounds in air. Vapors emanating from compounds such as explosives, or stripped from surfaces using heat and suction from a hand-held sample gun, are collected on surface coated with gas chromatograph (GC) material which trap explosives vapors but repel nitric oxide, then are desorbed and concentrated in one or more cold spot concentrators. A high speed gas chromatograph (GC) separates the vapors, after which specific vapors are decomposed in two pyrolyzers arranged in parallel and the resulting nitric oxide is detected. A low temperature pyrolyzer with silver produces NO from nitramines or nitrite esters; a high temperature pyrolyzer decomposes all explosives vapors to permit detection of the remaining explosives. Also disclosed is a series arrangement of pyroloyzers and gas chromatographs and an NO detector to time-shift detection of certain vapors and facilitate very fast GC analyses. The use of hydrogen as a carrier gas, plus unique collectors and concentrators, high speed heaters, NO detectors, and very fast, temperature-programmable GC's enhance selectivity, sensitivity and speed of detection.

摘要翻译： 公开了一种高选择性，灵敏，快速的检测系统和方法，用于检测空气中特定化合物的蒸气。 从化学品如爆炸物或从手持式样品枪吸取热量从表面剥离的蒸气在被气相色谱（GC）材料涂覆的表面上收集，该气相色谱（GC）材料捕获爆炸物蒸气但排斥一氧化氮，然后被解吸和浓缩 在一个或多个冷点浓缩器中。 高速气相色谱仪（GC）分离蒸汽，之后特定的蒸汽在平行排列的两个热解器中分解，并检测到所产生的一氧化氮。 含有银的低温热解器由硝胺或亚硝酸酯产生NO; 高温热解器分解所有炸药蒸气，以便检测剩余的炸药。 还公开了热解器和气相色谱仪的串联布置，以及用于某些蒸气的时移检测的NO检测器，并促进非常快速的GC分析。 使用氢气作为载气，加上独特的收集器和浓缩器，高速加热器，NO检测器和非常快速的温度可编程GC增强了选择性，灵敏度和检测速度。

公开(公告)号：US5310681A

公开(公告)日：1994-05-10

申请号：US73917

申请日：1993-06-09

申请人： David P. Rounbehler ,  Eugenie Hainsworth ,  David P. Lieb

发明人： David P. Rounbehler ,  Eugenie Hainsworth ,  David P. Lieb

IPC分类号： G01N1/00 ,  G01N1/02 ,  G01N1/22 ,  G01N1/28 ,  G01N1/40 ,  G01N21/76 ,  G01N27/417 ,  G01N30/02 ,  G01N30/06 ,  G01N30/08 ,  G01N30/12 ,  G01N30/14 ,  G01N30/16 ,  G01N30/30 ,  G01N30/40 ,  G01N30/46 ,  G01N30/62 ,  G01N30/64 ,  G01N30/72 ,  G01N30/84 ,  G01N31/12 ,  G01N33/00 ,  G01N33/22 ,  G01V9/00 ,  G01N25/54

CPC分类号： G01N30/461 ,  G01N1/02 ,  G01N27/4175 ,  G01N30/08 ,  G01N30/12 ,  G01N30/84 ,  G01N33/0057 ,  G01V9/007 ,  G01N1/2214 ,  G01N1/2226 ,  G01N1/28 ,  G01N1/40 ,  G01N2001/022 ,  G01N2001/028 ,  G01N2030/025 ,  G01N2030/065 ,  G01N2030/085 ,  G01N2030/121 ,  G01N2030/122 ,  G01N2030/123 ,  G01N2030/125 ,  G01N2030/126 ,  G01N2030/143 ,  G01N2030/167 ,  G01N2030/3007 ,  G01N2030/3046 ,  G01N2030/3053 ,  G01N2030/3061 ,  G01N2030/3069 ,  G01N2030/3076 ,  G01N2030/3084 ,  G01N2030/626 ,  G01N2030/642 ,  G01N2030/8405 ,  G01N21/76 ,  G01N30/14 ,  G01N30/40 ,  G01N30/62 ,  G01N30/72 ,  Y10T436/17 ,  Y10T436/179228

摘要： A highly selective, sensitive, fast detection system and method are disclosed for detecting vapors of specific compounds in air. Vapors emanating from compounds such as explosives, or stripped from surfaces using heat and suction from a hand-held sample gun, are collected on surfaces coated with gas chromatograph (GC) material which trap explosives vapors but repel nitric oxide, then are desorbed and concentrated in one or more cold spot concentrators. A high speed gas chromatograph (GC) separates the vapors, after which specific vapors are decomposed in two pyrolyzers arranged in parallel and the resulting nitric oxide is detected. A low temperature pyrolyzer with silver produces NO from nitramines or nitrite esters; a high temperature pyrolyzer decomposes all explosives vapors to permit detection of the remaining explosives. Also disclosed is a series arrangement of pyrolyzers and gas chromatographs and an NO detector to time-shift detection of certain vapors and facilitate very fast GC analyses. The use of hydrogen as a carrier gas, plus unique collectors and concentrators, high speed heaters, NO detectors, and very fast, temperature-programmable GC's enhance selectivity, sensitivity and speed of detection.

摘要翻译： 公开了一种高选择性，灵敏，快速的检测系统和方法，用于检测空气中特定化合物的蒸气。 从化合物如爆炸物或从手持式样品枪吸取热量从表面剥离的蒸气被收集在涂有气相色谱（GC）材料的表面上，该气相色谱（GC）材料捕获爆炸物蒸气但排斥一氧化氮，然后被解吸和浓缩 在一个或多个冷点浓缩器中。 高速气相色谱仪（GC）分离蒸汽，之后特定的蒸汽在平行排列的两个热解器中分解，并检测到所产生的一氧化氮。 含有银的低温热解器由硝胺或亚硝酸酯产生NO; 高温热解器分解所有炸药蒸气，以便检测剩余的炸药。 还公开了热解器和气相色谱仪的串联布置和用于某些蒸气的时移检测的NO检测器，并且促进非常快速的GC分析。 使用氢气作为载气，加上独特的收集器和浓缩器，高速加热器，NO检测器，以及非常快速的温度可编程GC增强了选择性，灵敏度和检测速度。

公开(公告)号：US5099743A

公开(公告)日：1992-03-31

申请号：US81917

申请日：1987-07-08

申请人： David P. Rounbehler ,  Eugenie Hainsworth ,  David P. Lieb

发明人： David P. Rounbehler ,  Eugenie Hainsworth ,  David P. Lieb

IPC分类号： G01N1/00 ,  G01N1/02 ,  G01N1/22 ,  G01N1/28 ,  G01N1/40 ,  G01N21/76 ,  G01N27/417 ,  G01N30/02 ,  G01N30/06 ,  G01N30/08 ,  G01N30/12 ,  G01N30/14 ,  G01N30/16 ,  G01N30/30 ,  G01N30/40 ,  G01N30/46 ,  G01N30/62 ,  G01N30/64 ,  G01N30/72 ,  G01N30/84 ,  G01N31/12 ,  G01N33/00 ,  G01N33/22 ,  G01V9/00

CPC分类号： G01N30/461 ,  G01N1/02 ,  G01N30/08 ,  G01N30/12 ,  G01N30/84 ,  G01N33/0057 ,  G01V9/007 ,  G01N1/2214 ,  G01N1/2226 ,  G01N1/28 ,  G01N1/40 ,  G01N2001/022 ,  G01N2001/028 ,  G01N2030/025 ,  G01N2030/065 ,  G01N2030/085 ,  G01N2030/121 ,  G01N2030/122 ,  G01N2030/123 ,  G01N2030/125 ,  G01N2030/126 ,  G01N2030/143 ,  G01N2030/167 ,  G01N2030/3007 ,  G01N2030/3046 ,  G01N2030/3053 ,  G01N2030/3061 ,  G01N2030/3069 ,  G01N2030/3076 ,  G01N2030/3084 ,  G01N2030/626 ,  G01N2030/642 ,  G01N2030/8405 ,  G01N21/76 ,  G01N30/14 ,  G01N30/40 ,  G01N30/62 ,  G01N30/72

摘要： A highly selective, sensitive, fast detection system and method are disclosed for detecting vapors of specific compounds in air. Vapors emanating from compounds such as explosives, or stripped from surfaces using heat and suction from a hand-held sample gun, are collected on surfaces coated with gas chromatograph (GC) material which trap explosives vapors but repel nitric oxide, then are desorbed and concentrated in one or more cold spot concentrators. A high speed gas chromatograph (GC) separates the vapors, after which specific vapors are decomposed in two pyrolyzers arranged in parallel and the resulting nitric oxide is detected. A low temperature pyrolyzer with silver produces NO from nitramines or nitrite esters; a high temperature pyrolyzer decomposes all explosives vapors to permit detection of the remaining explosives. Also disclosed is a series arrangement of pyrolyzers and gas chromatographs and an NO detector to time-shift detection of certain vapors and facilitate very fast GC analyses. The use of hydrogen as a carrier gas, plus unique collectors and concentrators, high speed heaters, NO detectors, and very fast, temperature-programmable GC's enhance selectivity, sensitivity and speed of detection.

摘要翻译： 公开了一种高选择性，灵敏，快速的检测系统和方法，用于检测空气中特定化合物的蒸气。 从化合物如爆炸物或从手持式样品枪吸取热量从表面剥离的蒸气被收集在涂有气相色谱（GC）材料的表面上，该气相色谱（GC）材料捕获爆炸物蒸气但排斥一氧化氮，然后被解吸和浓缩 在一个或多个冷点浓缩器中。 高速气相色谱仪（GC）分离蒸汽，之后特定的蒸汽在平行排列的两个热解器中分解，并检测到所产生的一氧化氮。 含有银的低温热解器由硝胺或亚硝酸酯产生NO; 高温热解器分解所有炸药蒸气，以便检测剩余的炸药。 还公开了热解器和气相色谱仪的串联布置和用于某些蒸气的时移检测的NO检测器，并且促进非常快速的GC分析。 使用氢气作为载气，加上独特的收集器和浓缩器，高速加热器，NO检测器和非常快速的温度可编程GC增强了选择性，灵敏度和检测速度。

公开(公告)号：US5300758A

公开(公告)日：1994-04-05

申请号：US825368

申请日：1992-01-24

申请人： David P. Rounbehler ,  David P. Lieb ,  Eugene K. Achter ,  David B. Gernes ,  Abdul Tafreshi

发明人： David P. Rounbehler ,  David P. Lieb ,  Eugene K. Achter ,  David B. Gernes ,  Abdul Tafreshi

IPC分类号： G01N1/22 ,  G01N21/76 ,  G01N30/46 ,  G01N30/62 ,  G01N30/74 ,  G01N30/84 ,  H05B1/02

CPC分类号： G01N30/62 ,  G01N30/84 ,  G01N2030/623 ,  G01N2030/8405 ,  G01N21/76 ,  G01N30/461 ,  G01N30/74

摘要： Disclosed are a method and apparatus for high speed, selective detection of vapors of specific compounds, particularly nitrogen-containing compounds, utilizing a bypass branch and high speed gas chromatography for improved selectivity and sensitivity of detection. A system with two gas chromatographs (GC's) alternating in series with two pyrolyzers provides two time intervals of detection in a downstream detector, with the second time interval containing signals delayed and further separated relative to signals from the first time interval. The bypass branch, in diverting a portion of the flow of gas samples from passage through the second gas chromatograph and second pyrolyzer, avoids interferences in the first time interval of detection from non-GC-retained compounds decomposed in the second pyrolyzer. Also disclosed is an arrangement for rapid, precise heating of vapor concentrator tubes in which vapors are rapidly focussed and then injected into a GC, and for rapid, precise heating of the GC's.

摘要翻译： 公开了一种利用旁路分支和高速气相色谱法对特定化合物，特别是含氮化合物的蒸气进行高速，选择性检测的方法和装置，以提高检测的选择性和灵敏度。 具有与两个热解器串联交替的两个气相色谱仪（GC）的系统在下游检测器中提供两个检测时间间隔，其中第二时间间隔包含相对于来自第一时间间隔的信号延迟和进一步分离的信号。 旁路分支在将一部分气体样品从通过第二气相色谱仪和第二热解器的过程中转移时，避免了在第二次热解器中分解的非GC保留化合物的第一时间间隔内的干扰。 还公开了一种用于快速精确加热蒸汽浓缩管的装置，其中蒸气快速聚焦，然后注入GC，并快速，精确地加热GC。

公开(公告)号：US5108705A

公开(公告)日：1992-04-28

申请号：US594267

申请日：1990-10-03

申请人： David P. Rounbehler ,  David P. Lieb ,  Eugene K. Achter ,  David B. Gernes ,  Abdul Tafreshi

发明人： David P. Rounbehler ,  David P. Lieb ,  Eugene K. Achter ,  David B. Gernes ,  Abdul Tafreshi

IPC分类号： G01N1/22 ,  G01N21/76 ,  G01N30/46 ,  G01N30/62 ,  G01N30/74 ,  G01N30/84

CPC分类号： G01N30/62 ,  G01N30/84 ,  G01N2030/623 ,  G01N2030/8405 ,  G01N21/76 ,  G01N30/461 ,  G01N30/74

摘要： Disclosed are a method and apparatus for high speed, selective detection of vapors of specific compounds, particularly nitrogen-containing compounds, utilizing, a bypass branch and high speed gas chromatography for improved selectively and sensitivity of detection. A system with two gas chromatographs (GC's) alternating in series with two pyrolyzers provides two time intervals of detection in a downstream detector, with the second time interval containing signals delayed and further separated relative to signals from the first time interval. The bypass branch, in diverting a portion of the flow of gas samples from passage through the second gas chromatograph and second pyrolyzer, avoids interferences in the first time interval of detection from non-GC-retained compounds decomposed in the second pyrolyzer. Also disclosed is an arrangement for rapid, precise heating of vapor concentrator tubes in which vapors are rapidly focussed and then injected into a GC, and for rapid, precise heating of the GC's.

摘要翻译： 公开了一种用于高速，选择性地检测特定化合物，特别是含氮化合物的蒸气的方法和装置，利用旁路分支和高速气相色谱法提高选择性和灵敏度。 具有与两个热解器串联交替的两个气相色谱仪（GC）的系统在下游检测器中提供两个检测时间间隔，其中第二时间间隔包含相对于来自第一时间间隔的信号延迟和进一步分离的信号。 旁路分支在将一部分气体样品从通过第二气相色谱仪和第二热解器的过程中转移时，避免了在第二次热解器中分解的非GC保留化合物的第一时间间隔内的干扰。 还公开了一种用于快速精确加热蒸汽浓缩管的装置，其中蒸气快速聚焦，然后注入GC，并快速，精确地加热GC。

公开(公告)号：US3996008A

公开(公告)日：1976-12-07

申请号：US614099

申请日：1975-09-17

申请人： David H. Fine ,  David P. Lieb ,  David P. Rounbehler

发明人： David H. Fine ,  David P. Lieb ,  David P. Rounbehler

IPC分类号： G01N30/84 ,  G01N31/08

CPC分类号： G01N30/84 ,  Y10T436/170769

摘要： Apparatus for detecting the amount of a specific compound in a sample. The apparatus comprises, in combination, a gas chromatograph, a cold trap and a specific gas detector. The cold trap includes means to cool the gas passing therethrough to a predetermined temperature, and means to maintain a predetermined pressure therein, whereby the chromatograph carrier gas is condensed and the gaseous effluent from the trap substantially consists of the specific gas.

摘要翻译： 用于检测样品中特定化合物的量的装置。 该装置组合包括气相色谱仪，冷阱和特定气体检测器。 冷阱包括将通过其中的气体冷却至预定温度的装置，以及在其中保持预定压力的装置，由此使色谱载气冷凝，并且来自捕集阱的气态流出物基本上由特定气体组成。

公开(公告)号：US5268302A

公开(公告)日：1993-12-07

申请号：US35541

申请日：1993-03-22

申请人： David P. Rounbehler ,  David P. Lieb

发明人： David P. Rounbehler ,  David P. Lieb

IPC分类号： G01N1/22 ,  G01N21/76 ,  G01N30/12 ,  G01N30/16 ,  G01N30/30 ,  G01N30/46 ,  G01N30/84 ,  G01N31/12 ,  G01N30/08 ,  G01N1/18 ,  G01N30/88 ,  G01N33/94

CPC分类号： G01N30/84 ,  G01N30/12 ,  G01N31/12 ,  G01N2030/121 ,  G01N2030/128 ,  G01N2030/3046 ,  G01N2030/8405 ,  G01N21/76 ,  G01N30/16 ,  G01N30/461 ,  Y10S436/816 ,  Y10S436/901 ,  Y10T436/145555 ,  Y10T436/147777 ,  Y10T436/170769 ,  Y10T436/173845 ,  Y10T436/255

摘要： A method and apparatus for selective, high speed detection of vapors of specific gas-chromatographically-separable compounds. In the disclosed method separate analyses are performed on two portions of a gas sample formed by flash-heating trapped vapors to successively higher temperatures while flowing hydrogen carrier gas over coatings in/on which the vapors are held. Within a total time interval of about twenty seconds 1) two sample portions are formed, 2) each portion is rapidly separated in two series-connected, high speed, temperature-programmed gas chromatographs, and 3) specific compounds are identified by detection of NO gas formed during an oxidative pyrolysis of each separated portion. One application of the described method and apparatus is the rapid, selective, and sensitive detection of nitrogen-containing compounds such as the drugs methamphetamine, cocaine, and heroin.

摘要翻译： 用于选择性，高速检测特定气相色谱分离化合物的蒸气的方法和装置。 在所公开的方法中，将通过闪蒸加热捕获的蒸气形成的气体样品的两部分分别进行分析，同时使氢载体气体流过其上保持蒸汽的涂层。 在大约20秒的总时间间隔内1）形成两个样品部分，2）每个部分在两个串联连接的高速，温度程序化的气相色谱仪中快速分离，3）通过检测NO 在每个分离部分的氧化热解期间形成气体。 所述方法和装置的一个应用是对含氮化合物如甲基苯丙胺，可卡因和海洛因的快速，选择性和灵敏的检测。

公开(公告)号：US5606589A

公开(公告)日：1997-02-25

申请号：US438172

申请日：1995-05-09

申请人： Anthony J. Pellegrino ,  Daniel N. Lyke ,  David P. Lieb ,  Joseph A. Buturlia ,  Michael P. Appleby

发明人： Anthony J. Pellegrino ,  Daniel N. Lyke ,  David P. Lieb ,  Joseph A. Buturlia ,  Michael P. Appleby

IPC分类号： G21K1/02 ,  G21K1/00

CPC分类号： A61B6/502 ,  G21K1/025

摘要： Air cross grids, for absorbing scattered secondary radiation and improving X-ray imaging in general radiography and in mammography, are provided with a large plurality of open air passages extending through each grid panel. These passages are defined by two large pluralities of substantially parallel partition walls, respectively extending transverse to each other. Each grid panel is made by laminating a plurality of thin metal foil sheets photo-etched to create through openings defined by partition segments. The etched sheets are aligned and bonded to form the laminated grid panel, which is moved edgewise during the X-ray exposure to pass primary radiation through the air passages while absorbing scattered secondary radiation arriving along slanted paths.

摘要翻译： 用于吸收散射二次辐射的空气十字网格和在一般放射照相术和乳房照相术中改进X射线成像提供有延伸穿过每个格栅板的大量多个露天通道。 这些通道由分别相互横向延伸的两个大的多个大致平行的分隔壁限定。 每个网格面板通过层叠多个薄的金属箔薄片来制造，所述薄金属薄片被光蚀刻以形成通过由分隔段限定的开口。 蚀刻的片材被对准并结合以形成层叠网格板，其在X射线曝光期间沿边移动以使初级辐射通过空气通道，同时吸收沿倾斜路径到达的散射的次级辐射。