CN1296565A - Valveless gas chromatographic system with pulsed injection and temperature programmed elution - Google Patents
Valveless gas chromatographic system with pulsed injection and temperature programmed elution Download PDFInfo
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- CN1296565A CN1296565A CN 99804928 CN99804928A CN1296565A CN 1296565 A CN1296565 A CN 1296565A CN 99804928 CN99804928 CN 99804928 CN 99804928 A CN99804928 A CN 99804928A CN 1296565 A CN1296565 A CN 1296565A
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- 238000002347 injection Methods 0.000 title description 6
- 239000007924 injection Substances 0.000 title description 6
- 238000010828 elution Methods 0.000 title description 3
- 238000005070 sampling Methods 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 48
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- 238000009834 vaporization Methods 0.000 claims description 14
- 230000008016 vaporization Effects 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000012159 carrier gas Substances 0.000 claims 1
- 230000008676 import Effects 0.000 claims 1
- 238000004458 analytical method Methods 0.000 abstract description 9
- 230000003213 activating effect Effects 0.000 abstract 1
- 238000004587 chromatography analysis Methods 0.000 abstract 1
- 239000003814 drug Substances 0.000 description 6
- 229940079593 drug Drugs 0.000 description 6
- 239000002360 explosive Substances 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000008246 gaseous mixture Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010223 real-time analysis Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000003444 anaesthetic effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000000599 controlled substance Substances 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 230000005264 electron capture Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0606—Investigating concentration of particle suspensions by collecting particles on a support
- G01N15/0637—Moving support
- G01N15/0643—Moving support of the filter type
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/30—Control of physical parameters of the fluid carrier of temperature
- G01N2030/3053—Control of physical parameters of the fluid carrier of temperature using resistive heating
- G01N2030/3061—Control of physical parameters of the fluid carrier of temperature using resistive heating column or associated structural member used as heater
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/62—Detectors specially adapted therefor
- G01N2030/621—Detectors specially adapted therefor signal-to-noise ratio
- G01N2030/623—Detectors specially adapted therefor signal-to-noise ratio by modulation of sample feed or detector response
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
A portable gas chromatograph includes a sample adsorbing ribbon (220) having a sampling position (205) and second desorbing position (206). The sample is desorbed by activating heaters (210, 211). The desorbed sample passes to a chromatography column (209b) which is then heated by a third heater (212). The separated sample is passed to a detector (213) for analysis.
Description
The present invention relates generally to the detection and the analysis of gas composition, the present invention relates in particular to has pulsed injection and temperature programmed elution and no valve system that utilize gas chromatogram.
Gas chromatogram is a kind of confirmed analytical technology that is used for separating the gaseous mixture component when gaseous mixture flows through the post tower of a tubulose.The current existence manyly injects initial sample and finishes the diverse ways that separates in the post tower.For example, in Fig. 1 a and 1b, just express and in open tubulose post tower, realize a kind of known method of separating.According to said method, when valve 1 was transferred to injection phase shown in Fig. 1 b from the sampling location shown in Fig. 1 a, valve 1 inlet flow was crossed loop 2 and is entered the small amount of sample of post tower 3.By means of by the flowing of valve interface 4 and 5 vector gas, carry this small amount of sample to the motion of post tower below, and when this small amount of sample when scribbling the tower wall interaction of suitable separating medium, this small amount of sample just is separated into its each component.Consequently, each component is left the post tower as the volume that separates in the different time.A kind of injection of component and leave between time be referred to as hold-up time of this component.Detect each component by suitable detection system, for example, electron capture detector (ECD) or thermal conductivity detector.Then, draw the signal curve that produces by detector (chromatogram detector) so that analyze.
The speed of analyzing in this system depends on Several Factors, comprising: the temperature and the speed of vector gas in the type of post tower and length, the post tower.In the ordinary course of things, be the magnitude that a few minutes arrives several hrs total analysis time.The preparation of sample and injection may need a few minutes to arrive the time of several hrs, and this depends on the character of sample.Therefore, for carrying out real-time analysis, this method needs speed-raising significantly.
When using this gas chromatogram measuring technique fast detecting and identification to be included in anesthetic and the explosive compound, real-time analysis is urgently to wish.The object of suspicion that can use sampling and detection system inspection based on the gas chromatogram measuring technique might comprise explosive release or controlled drugs and arcotic.Some equipment are useful in border boundary and place, critical point, airport like this, can be used for identification or prevent drug smuggling or terrorist activity.Therefore, but the also urgent this detection system of wishing to produce portable and true-time operation.
And also expectation produces available battery-operated this system.The gas chromatogram measurement requirement sampling piece-rate system of drugs or blast sample is at high temperature operated, and is general in the scope of 100-300 degree C Celsius.Current, also can operate in such high-temperature region and analyze drugs and explosive, because the power requirement of gas chromatography systems makes the battery-operated portable system with physical size and weight not work usually without any a GC-IMS device Energy Efficient or portable.Therefore, also urgently expect to have a kind of chromatographic system of power consumption minimum under the condition of any sacrifice in performance not.
The invention provides a kind of novel apparatus and method of operating that is used for impulse type rapid sampling and gas chromatogram (GC) piece-rate system, it can contain drugs and Explosive Residues with minimum power consumption sampling and analysis package in less than 20 seconds time particle and vaporization body.Provided by the invention speed and energy-conservation aspect advantage be because the technology of a kind of " as required heat (HOD) " that will illustrate below having used.
In simple portable low power-consumption GC-IMS sample collection disclosed by the invention and analytic system, use the pulsed analytical technology that several important advantages is arranged.Since the pulse character of system, ability consumed power when only analyzing in system, the static system that is always maintained at High Operating Temperature with parts is compared, and this has just greatly increased the total energy efficiency of system.It can be actually used in uses in the hand-held analytical equipment of battery as the energy.
Moreover the pulsed heating schedule can avoid using as in the high temperature static system valve sample group that transfers to enter the post tower, so this system is simpler and more reliable.
Valuably, system of the present invention can be used as an integrated system operation, be used for sample collecting, analysis and data presentation, thereby make it become the desirable portable real-time analyzer that can be used for many application scenarios, seeking and the air quality monitoring located comprising drugs and explosive inspection, at frontier station, airport etc.
And then the present invention can also use with an ion mobility frequency spectrograph (IMS) device, as the secondary analysis device.Overall selectivity and the sensitivity of using IMS greatly to improve instrument can not have a negative impact to its performance or energy efficiency again simultaneously.
Describe additional features of the present invention and advantage with reference to the accompanying drawings in detail, and the structure of each embodiment of the present invention and operation.In the accompanying drawings, similarly label is represented identical or functionally similar parts.
Describe the preferred embodiments of the present invention with reference to the accompanying drawings by means of example now, wherein:
Fig. 1 a and 1b separate the example of a gaseous mixture component when representing in gaseous mixture flows through as prior art systems a known tubulose post tower;
Fig. 2 a represents the synoptic diagram of Valveless gas chromatographic system of the present invention; With
Fig. 2 b is a curve map, represents heating and cooling order of the present invention.
In a preferred embodiment, Valveless gas chromatographic system of the present invention is an integrated sampling and tripping device.This system may be used as portable handheld device with this being integrated with of an analytical equipment.Submit on October 20th, 1998, name is called that PCT application PCT/US98/22092 " the sample trapping ion mobility spectrometer that is used for portable Molecular Detection ", relevant and that own together can find and the description of the handheld apparatus of the system integration of the present invention, here all with reference to the description of having quoted this application.
Fig. 2 a represents a synoptic diagram of system of the present invention.This system can be divided into sampling section and analysis part.This system comprises a sample drip catcher, and this sample drip catcher has about 1/2 inch wide band, and band is wound onto on bobbin 201 and 202, and passes through between sampling section and analysis part.The material that is used for making band can be that stock size is 400 or a bigger wire netting or other porous type, its allow air freedom by but can capture little particle or gas.Adsorb the adsorbing medium of expectation molecule interested by apply a kind of known in the art being used for for band, can improve capturing or capacity gauge of gas.
One nozzle 203 and a pump line 204 are columnar entities, and are being provided with soft O V-shaped ring near strap ends.When this machine is in sample mode, 203 and 204 form a tightening seal on a part 205 of band.One vacuum pump that is fixed on the pump line 204 passes through sampling nozzle 203 intake-gas and/or particle in the sample region 205 of band.After the predetermined sampling duration, for example after sampling in several seconds, nozzle 203 and pump line 204 are removed from band, thereby interrupt sealing.This moving process is by means of being finished by the motor of computing machine 410 controls.After sealing was cut off, band moved to position 206 along the direction of arrow 220 expressions.Moving of band also finished by means of motor and position transducer, and said position transducer stops said motor after making the sample location.
In case be in position 206, take off inhale interface 207 and grouting socket 208 under Electric Machine Control to the bar Tape movement, and around 206, form a gas-tight seal.This takes off and inhales interface 207 is diameters less than a cylindrical shape entity of 1/4 inch, and can comprise the electric heater of establishing in 210, can be in seconds will be by band gas heating to 200 degree or higher temperature Celsius.A kind of vector gas flows into 207, and is heated by well heater, thereby when heated gas flows out on the part 206 of taking off suction interface 207 and inciding band, these gases will be captured in the band again and be positioned at the sample heating at 206 places.In general the flow rate of vector gas is about 50-200cc/ minute.
Taking off when to inhale interface 207 be red-hot, is using identical technology grouting socket 208 also to be heated to the temperature identical with taking off suction interface 207 by means of electric heater 211.Grouting socket 208 has a complicated more structure, because it also has a gas chromatogram post tower 209 that connects according to unique way.Post tower 209 in a preferred embodiment has a metal-coating, by coming from the directly said overcoat of heating of a controllable electric power 212 and the electric current by said overcoat.The part 209a of post tower 209 is in the inside of grouting socket 208, and the part 209b of post tower 209 is in the outside of grouting socket 208.The far-end of part 209b is connected to detecting device 213.This detecting device is an IMS detecting device preferably.The vector gas that flows into grouting socket 208 directly enters the part 209a of post tower, and so entering part 209b.When taking off suction interface 207 and grouting socket 208 heating, post tower 209 is not heated.This will make captive sample move at the part 209a that 206 places vaporizations and the vector gas by heat are released to pass the post tower, and condense at the place that begins of the part 209b of post tower.
In case sample settles out at the front end of post tower 209, will cut off well heater 210 and 211, in general undertaken by computer control 410.Because interface the 207, the 208th, the material of usefulness thermal capacity minimum constitutes, so the temperature of well heater in seconds is reduced to environment temperature rapidly.Computing machine 410 detects the temperature of interfaces 207,208, and when this temperature has reached a suitable minimum value, promptly cans be compared to most environment temperature and exceed about 20 degree Celsius, computing machine 410 connection well heaters 212.This just makes part 209a, the 209b of post tower in seconds be heated to rapidly above 200 degree Celsius from environment temperature.This rate of heat addition is controlled by computer program.Owing in the post tower, there is being a vector gas to flow during the heat cycles, so the compound of cohesion moves down along the post tower, and is separated into each component, and leaves in the different time and to enter IMS213 here.Independent component group in these samples of IMS ionization, and in the drift gas that flows into IMS, further separate these components according to their mobility.Then, on an electrode, collect each ion swarm, and carry out electronics mode ground by amplifier 214 for these ion swarms and amplify, and use a computer and 410 on display 215, show so that make further signal Processing.It should be noted that other the pick-up unit that can also use except that IMS, for example, can connect different pick-up units in the end of post tower 209.
Whether the heating and cooling program of this analytic system is successful most important as the pulsed gas chromatography systems of programming for this device.Express the curve of this heating and cooling order and describe in Fig. 2 b, wherein transverse axis is 3 time shafts that curve is shared.3 Z-axises that separate are temperature axis.The maximal value of temperature depends on the character of the compound of analyzing, and in general is about 200 degree Celsius for explosive and this maximum temperature of drugs compound.In general the elevation rate of the programming temperature of post tower is a constant, but can change, so that follow the tracks of the curve of 410 expectations of determining that use a computer, thus working cycle that can control heater.Shown in Fig. 2 b, between the heat cycles 240,250 of interface 207,208 well heaters, do not postpone, but after these well heaters coolings, just begin the heating of post tower, as shown in 260, to realize above-mentioned desired effects.
In addition, heated part has low thermal capacity, and is designed to dispel the heat efficiently.A kind of like this design is for realizing that the express-analysis time is important.For above-mentioned system of the present invention, interface 207,208 and post tower 209 can be heated in several seconds time and in working range and cool off.
Though specifically describe and represented that the present invention, the common technique personnel of this area should be appreciated that with reference to the preferred embodiments of the present invention, under the condition that does not depart from design of the present invention and scope, can carry out above-mentioned variation with other in the form and details.
Claims (17)
1, a kind of high-speed sampling and gas chromatogram piece-rate system, it can sample and analyze molecule (s) of interest, and this system comprises:
An input media is used for collecting the sample particle with molecule interested in a primary importance;
An interface arrangement, it can be heated by heating pulse, this interface arrangement is connected on the input media, so that receive the sample particle with molecules of interest in a second place, this molecule (s) of interest discharges a vaporization body in response to the thermal pulse that is applied to interface arrangement; With
A gas column tower apparatus, it is connected on the interface arrangement, this gas column tower apparatus receives described vaporization body, the temperature of this gas column tower apparatus is lower than the temperature of interface arrangement, and wherein: described vaporization body condenses in the gas column tower apparatus, and this gas column tower apparatus further can be heated by a heating pulse, wherein, in response to the thermal pulse that is applied to the gas column tower, the vaporization body of the cohesion of molecules of interest is separated into each component, and leaves the gas column tower in the different time.
2, system as claimed in claim 1, it is characterized in that: system further comprises:
A detecting device, it is connected on the gas column tower, and detecting device receives each component of the vaporization body of cohesion, and detecting device is used to analyze molecule (s) of interest.
3, system as claimed in claim 1 is characterized in that interface arrangement comprises:
One is taken off the suction interface, is used to receive a vector gas, this take off inhale interface can be by heating pulse heating, and can be in response to the further heating carrier gas of heating pulse; With
A grouting socket, it is positioned to such an extent that inhale interface received vector gas from taking off, this grouting socket can be heated by a heating pulse, wherein: molecule (s) of interest is placed in to take off to be inhaled between interface and the grouting socket, when leaving, takes off when inhaling interface and entering grouting socket heated vector gas, can heat the sample particle with molecule (s) of interest, the vector gas of this heating further makes molecule (s) of interest discharge a vaporization body in grouting socket.
4, system as claimed in claim 3, it is characterized in that: the gas column tower apparatus has a first and a second portion, first is positioned in grouting socket inside, second portion is positioned in the grouting socket outside, wherein: carry the described vector gas that carries the vaporization body of molecule (s) of interest from first to second portion.
5, system as claimed in claim 4 is characterized in that this system further comprises:
A detecting device, it is connected on the second portion, and detecting device receives the also vaporization body of ionization molecule (s) of interest, makes it become the component of ionization so that analyze.
6, system as claimed in claim 5 is characterized in that this system further comprises:
An amplifier, it is connected on the detecting device, is used to amplify signal that the component by ionization produces to carry out further signal Processing.
7, system as claimed in claim 6 is characterized in that this system further comprises an output unit, is used for the signal to user's display process.
8, system as claimed in claim 1 is characterized in that: the gas column tower further comprises a metal-coating, can directly heat this metal-coating by the electric current that flows through this metal-coating.
9, system as claimed in claim 3 is characterized in that this system further comprises a primary heater, and it can inhale interface transmission pulsed heat to taking off.
10, system as claimed in claim 3 is characterized in that this system further comprises a secondary heater, and it can transmit the pulsed heat to grouting socket.
11, system as claimed in claim 3 is characterized in that this system further comprises one the 3rd well heater, and it can transmit the pulsed heat to the gas column tower.
12, system as claimed in claim 3 is characterized in that this system further comprises:
A nozzle is used to import the sample particle with molecule (s) of interest, so that collect for detection and vaporize, this nozzle has one first end, and input here has the sample of molecule (s) of interest, and this nozzle further also has one second end;
A pump line, pump line can be connected on second end of nozzle; With
A band, it passes through between nozzle and pump line, and this band is collected the sample particle with molecule (s) of interest in primary importance,
Wherein: said pump line is sucked in the band sample particle with molecule (s) of interest by nozzle, the said band of the sample particle with molecules of interest is moved further, inhales between interface and the grouting socket so that said band is positioned in to take off in the second place.
13, as the system of claim 12, it is characterized in that: band is a porous type.
14, as the system of claim 12, it is characterized in that: band is a wire netting.
15, a kind of method that is used in a gas chromatogram piece-rate system high speed sampling and analyzing molecules component, this method comprises the steps:
Receive sample particle with molecule (s) of interest at an interface arrangement;
Utilize thermal pulse to heat this interface arrangement, so that convert molecule (s) of interest to the vaporization body to a selected temperature;
A gas column tower apparatus that is lower than interface arrangement to temperature is transferred said vaporization body;
Vaporization body in the condensed gas post tower apparatus; With
Heat this gas column tower apparatus to predetermined temperature with thermal pulse, thereby make the vaporization body be separated into each component and leave the gas column tower in the different time.
16,, it is characterized in that this method further comprises the steps: as the method for claim 15
When each component is left the gas column tower apparatus, in detecting device, receive each component.
17,, it is characterized in that this method further comprises the steps: as the method for claim 15
Before receiving step, collect sample particle to a band with molecule interested from the input nozzle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US7419598P | 1998-02-10 | 1998-02-10 | |
| US60/074195 | 1998-02-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1296565A true CN1296565A (en) | 2001-05-23 |
Family
ID=22118254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99804928 Pending CN1296565A (en) | 1998-02-10 | 1999-02-10 | Valveless gas chromatographic system with pulsed injection and temperature programmed elution |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1062504A4 (en) |
| JP (1) | JP2002502970A (en) |
| CN (1) | CN1296565A (en) |
| AU (1) | AU2665999A (en) |
| CA (1) | CA2320445A1 (en) |
| WO (1) | WO1999040422A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100394180C (en) * | 2002-12-10 | 2008-06-11 | 霍尼韦尔国际公司 | Phased micro analyzer |
| CN103335924A (en) * | 2012-12-10 | 2013-10-02 | 江苏天瑞仪器股份有限公司 | Atmospheric heavy-metal on-line analyzer |
| CN103399075A (en) * | 2013-07-25 | 2013-11-20 | 中国科学院生态环境研究中心 | Double-mode detecting method and kit for detecting for organic explosive residues |
| CN102246031B (en) * | 2008-10-06 | 2015-01-28 | 联合分析系统有限责任公司 | Transfer unit for analysis devices |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012132781A (en) * | 2010-12-21 | 2012-07-12 | Taiyo Nippon Sanso Corp | Analytical method using gas chromatography and analyzer using gas chromatography |
| JP2023074856A (en) * | 2021-11-18 | 2023-05-30 | 株式会社島津製作所 | Gas chromatography device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3768300A (en) * | 1971-09-24 | 1973-10-30 | Vacuum Inst Corp | Differential sorption chromatograhy |
| CA997169A (en) * | 1973-10-01 | 1976-09-21 | John L. Brokenshire | Detector for a trace of a specific vapour in the atmosphere |
| US4551848A (en) * | 1981-12-10 | 1985-11-05 | Mount Isa Mines Limited | Lead-in-air monitor |
| US5092219A (en) * | 1987-07-08 | 1992-03-03 | Thermedics Inc. | Selective decomposition of nitrite esters and nitramines |
| US5268302A (en) * | 1990-05-29 | 1993-12-07 | Thermedics Inc. | Selective, high speed detection of vapors with analysis of multiple GC-separated portions |
| US5135549A (en) * | 1991-01-30 | 1992-08-04 | The Board Of Trustees Of Southern Illinois University | Chromatographic technique and apparatus |
| DE4419596C1 (en) * | 1994-06-03 | 1995-06-01 | Gerstel Gmbh | Thermodesorption device for gas chromatograph |
| AU2781995A (en) * | 1994-06-24 | 1996-01-19 | Universite De Montreal | Selective removal of volatile substances injected into a chromatographic packing filled column |
-
1999
- 1999-02-10 JP JP2000530785A patent/JP2002502970A/en active Pending
- 1999-02-10 EP EP99906839A patent/EP1062504A4/en not_active Withdrawn
- 1999-02-10 CN CN 99804928 patent/CN1296565A/en active Pending
- 1999-02-10 WO PCT/US1999/002777 patent/WO1999040422A1/en not_active Application Discontinuation
- 1999-02-10 AU AU26659/99A patent/AU2665999A/en not_active Abandoned
- 1999-02-10 CA CA002320445A patent/CA2320445A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100394180C (en) * | 2002-12-10 | 2008-06-11 | 霍尼韦尔国际公司 | Phased micro analyzer |
| CN102246031B (en) * | 2008-10-06 | 2015-01-28 | 联合分析系统有限责任公司 | Transfer unit for analysis devices |
| CN103335924A (en) * | 2012-12-10 | 2013-10-02 | 江苏天瑞仪器股份有限公司 | Atmospheric heavy-metal on-line analyzer |
| CN103399075A (en) * | 2013-07-25 | 2013-11-20 | 中国科学院生态环境研究中心 | Double-mode detecting method and kit for detecting for organic explosive residues |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2320445A1 (en) | 1999-08-12 |
| WO1999040422A1 (en) | 1999-08-12 |
| EP1062504A4 (en) | 2001-02-14 |
| JP2002502970A (en) | 2002-01-29 |
| EP1062504A1 (en) | 2000-12-27 |
| AU2665999A (en) | 1999-08-23 |
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