WO2017033041A1 - Gas chromatography device and method - Google Patents
Gas chromatography device and method Download PDFInfo
- Publication number
- WO2017033041A1 WO2017033041A1 PCT/IB2015/056362 IB2015056362W WO2017033041A1 WO 2017033041 A1 WO2017033041 A1 WO 2017033041A1 IB 2015056362 W IB2015056362 W IB 2015056362W WO 2017033041 A1 WO2017033041 A1 WO 2017033041A1
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- WIPO (PCT)
- Prior art keywords
- chromatographic column
- detector
- sample
- air
- microfiber
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004817 gas chromatography Methods 0.000 title description 15
- 239000007789 gas Substances 0.000 claims abstract description 37
- 229920001410 Microfiber Polymers 0.000 claims abstract description 23
- 239000003658 microfiber Substances 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 22
- 239000012159 carrier gas Substances 0.000 claims abstract description 11
- 238000011156 evaluation Methods 0.000 claims abstract description 10
- 238000005086 pumping Methods 0.000 claims abstract description 9
- 238000004587 chromatography analysis Methods 0.000 claims abstract 2
- 239000003570 air Substances 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000005751 Copper oxide Substances 0.000 claims description 3
- 239000003463 adsorbent Substances 0.000 claims description 3
- 239000012080 ambient air Substances 0.000 claims description 3
- 229910000431 copper oxide Inorganic materials 0.000 claims description 3
- 229910052753 mercury Inorganic materials 0.000 claims description 3
- 229920000767 polyaniline Polymers 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 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
- G01N30/62—Detectors specially adapted therefor
- G01N30/64—Electrical detectors
-
- 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
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
-
- 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
- G01N30/64—Electrical detectors
- G01N2030/645—Electrical detectors electrical conductivity detectors
Definitions
- the invention relates to a portable gas chromatography device and a method for analyzing a gas mixture.
- a gas chromatograph is, in general, a chemical analysis instrument for separating chemicals in a sample.
- a gas chromatograph uses a flow-through narrow tube known as the column, through which different chemical constituents of a sample pass in a gas stream at different rates depending on their various chemical and physical properties and their interaction with a specific column filling.
- Gas chromatography devices are often large and expensive with insufficient accuracy in their analysis.
- US6530260B1 describes a gas chromatography (CC) system, comprising (a) a GC oven including an oven cavity enveloped by a walled structure having at least first and a second walls thereof, said first wall having at least one module receiving opening defined therein, said second wall having an injector port and a detector port defined therein, and injector and detector connectors extending from said injector and detector ports into said oven cavity; (b) at least one GC column module removably secured within said at least one module receiving opening of said first wall and disposed external to said oven cavity, said at least one GC column module including: a module housing, a capillary column positioned within said module housing and having a main coil and a pair of free ends extending from said main coil, a pair of transfer lines, each coupled to a respective one of said free ends of said main coil, said transfer lines for controlling the temperature of said free ends of said main coil in a region adjacent said main coil, a heater wire positioned adjacent said transfer lines, and means for securing said at least
- US 6627454 B2 describes a gas chromatography method for analyzing materials vaporizable in a gas chromatograph system, the method including filling a sample injection device with a sample of the compounds to be analyzed; transferring the sample compounds into an analytical separation column with a transfer gas; passing a carrier gas inside the analytical separation column for time separation of the sample compounds; controlling the temperature of the column for achieving separation of the sample compounds; transferring the vaporized sample compounds eluted from the column into a flame ionization detector; providing the gases required for the operation of the flame ionization detector, and analyzing the data output of the flame ionization detector for analysis of the sample compounds, wherein the gases required for the operation of the gas chromatograph system are produced by water electrolysis.
- the gases required for operation of the gas chromatograph system are produced by water electrolysis without separating the hydrogen from the co-produced oxygen.
- Gas chromatograph systems for analyzing vaporizable materials are also provided.
- a first aspect of the invention provides a portable gas chromatography device for analyzing a gas mixture, the device comprising: - a chromatographic column for separating components of a sample of the gas mixture, the chromatographic column having an inlet and an outlet; - an air pump coupled to the inlet of chromatographic column for pumping an air to the chromatographic column; - an injector coupled to the inlet of chromatographic column for feeding the sample through the chromatographic column via the air as carrier gas; - a detector arranged downstream from the chromatographic column and coupled to the outlet of chromatographic column, the detector being configured for detecting the separated components of the sample, wherein the detector is a semi-conductive microfiber detector; - an evaluation unit arranged and configured for evaluating each detected component so as to determine a concentration of each detected component.
- the above measures involve a chromatographic column for separating components of a sample of the gas mixture, the chromatographic column having an inlet and an outlet.
- the chromatographic column may be an open tubular capillary columns or a packed Column.
- the above measures further involve an air pump coupled to the inlet of chromatographic column for pumping an air to the chromatographic column.
- the above measures further involve an injector coupled to the inlet of chromatographic column for feeding the sample through the chromatographic column via the air as carrier gas.
- the above measures further involve a detector arranged downstream from the chromatographic column and coupled to the outlet of chromatographic column, the detector being configured for detecting the separated components of the sample, wherein the detector is a semi-conductive microfiber detector.
- the above measures further involve an evaluation unit arranged and configured for evaluating each detected component so as to determine a concentration of each detected component.
- a microfiber detector has micro-dimensions, does not affect chemically gas samples, acts in the presence of air humidity. Compare to common commercial GC detectors e.g.
- the microfiber detector is low cost, easily connectable to the device, with condition time, acts in low temperature as well as in high temperature e.g. 30-150 ⁇ C, doesn’t act selectively and responses to almost all vapors with different sensitivity.
- the microfiber detector comprises a microfiber selected from a group of: polypyrrole-polyaniline copolymer, polypyrrole-copper oxide and polypyrrole-mercury.
- the microfiber detector has a height of 0.5 centimeter or less and a length of about 5 centimeter or less.
- the device has a weight of about 3 kilograms or less.
- the device has a length of about 30 centimeter or less and a height of about 20 centimeter or less.
- the sample is fed through the chromatographic column in room temperature and wherein the air is ambient air.
- the device further comprises a programmable heating unit for heating the sample or the air and wherein the chromatographic column is configured for separating components of a heated sample.
- the injector is a multi-adsorbent injector.
- the evaluation unit comprises a multimeter configured for measuring variations in a resistance of the microfiber and thereby determining the concentration of each detected component.
- a method for analyzing a gas mixture comprising: - pumping an air to a chromatographic column; - feeding a sample of the gas mixture through the chromatographic column via the air as carrier gas; - separating components of the sample in the chromatographic column; - detecting the separated components of the sample by a detector, wherein the detector is a semi-conductive microfiber detector; - evaluating each detected component so as to determine a concentration of each detected component.
- FIG. 1 shows a portable gas chromatography device for analyzing a gas mixture.
- FIG. 1 shows a portable gas chromatography device for analyzing a gas mixture.
- FIG. 1 shows a portable gas chromatography device 100 for analyzing a gas mixture.
- the device 100 comprises a chromatographic column 115 for separating components of a sample 104 of the gas mixture, the chromatographic column 115 having an inlet and an outlet.
- the device 100 further comprises an air pump 110 coupled to the inlet of chromatographic column 115 for pumping an air 102 to the chromatographic column 115.
- the device 100 further comprises an injector 105 coupled to the inlet of chromatographic column 115 for feeding the sample 104 through the chromatographic column 115 via the air 102 as carrier gas.
- the device 100 further comprises a detector 120 arranged downstream from the chromatographic column 115 and coupled to the outlet of chromatographic column 115, the detector 120 being configured for detecting the separated components 106 of the sample104, wherein the detector 120 is a semi-conductive microfiber detector.
- the device 100 further comprises an evaluation unit 125 arranged and configured for evaluating each detected component 108 so as to determine a concentration of each detected component 108.
- Figure 2. shows a portable gas chromatography device 200 for analyzing a gas mixture.
- the device 200 may have a weight of about 3 kilograms or less.
- the device 200 may have a length of about 30 centimeter or less and a height of about 20 centimeter or less.
- the device 200 comprises a chromatographic column 226 for separating components of a sample 205 of the gas mixture, the chromatographic column 226 having an inlet 225 and an outlet 227.
- the device 200 further comprises an air pump 222 coupled to the inlet 225 of chromatographic column 226 for pumping an air 207 to the chromatographic column 226.
- the sample 205 may be fed through the chromatographic column 226 in room temperature and the air 207 may be ambient air.
- the air 207 may be provided by the air pump 222 with flow rate of, for example, 10 mL min ⁇ 1 .
- the device 200 further comprises an injector 224 coupled to the inlet 225 of chromatographic column 226 for feeding the sample 205 through the chromatographic column 226 via the air 207 as carrier gas.
- the injector may be for example a multi-adsorbent injector.
- the device 200 further comprises a detector 232 arranged downstream from the chromatographic column 226 and coupled to the outlet 227 of chromatographic column 226, the detector 232 being configured for detecting the separated components 231 of the sample 205, wherein the detector 232 is a semi-conductive microfiber detector.
- the detector 232 may comprise a microfiber 236 selected from a group of: polypyrrole-polyaniline copolymer, polypyrrole-copper oxide and polypyrrole-mercury.
- the detector 232 may have a height of 0.5 centimeter or less and a length of about 5 centimeter or less.
- the device 200 further comprises an evaluation unit 234 arranged and configured for evaluating each detected component 231 so as to determine a concentration of each detected component 231.
- the evaluation unit 234 may comprise a multimeter configured for measuring variations in a resistance of the microfiber 236 and thereby determining the concentration of each detected component.
- the microfiber 236 may be connected to the evaluation unit 234 via connecting wires 230.
- Figure 3 shows a method 300 for analyzing a gas mixture.
- the method 300 comprises pumping 310 an air to a chromatographic column.
- the method 300 further comprises feeding 320 a sample of the gas mixture through the chromatographic column via the air as carrier gas.
- the method 300 further comprises separating 330 components of the sample in the chromatographic column.
- the method 300 further comprises detecting 340 the separated components of the sample by a detector, wherein the detector is a semi-conductive microfiber detector.
- the method 300 further comprises evaluating 350 each detected component so as to determine a concentration of each detected component.
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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)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
A portable chromatography device and a method are provided for analyzing a gas mixture. The device comprises a chromatographic column for separating components of a sample of the gas mixture. The device further comprises an air pump coupled to the inlet of chromatographic column for pumping an air to the chromatographic column. The device further comprises an injector coupled to the inlet of the chromatographic column for feeding the sample through the chromatographic column via the air as carrier gas. The device further comprises a detector arranged downstream from the chromatographic column and coupled to the outlet of the chromatographic column, the detector being configured for detecting the separated components of the sample, wherein the detector is a semi-conductive microfiber detector. The device further comprises an evaluation unit arranged and configured for evaluating each detected component so as to determine a concentration of each detected component.
Description
The invention relates to a portable gas
chromatography device and a method for analyzing a gas mixture.
A gas chromatograph is, in general, a chemical
analysis instrument for separating chemicals in a
sample. A gas chromatograph uses a flow-through narrow
tube known as the column, through which different
chemical constituents of a sample pass in a gas stream
at different rates depending on their various chemical
and physical properties and their interaction with a
specific column filling. Gas chromatography devices are
often large and expensive with insufficient accuracy in
their analysis.
US6530260B1 describes a gas chromatography
(CC) system, comprising (a) a GC oven including an oven
cavity enveloped by a walled structure having at least
first and a second walls thereof, said first wall having
at least one module receiving opening defined therein,
said second wall having an injector port and a detector
port defined therein, and injector and detector
connectors extending from said injector and detector
ports into said oven cavity; (b) at least one GC column
module removably secured within said at least one module
receiving opening of said first wall and disposed
external to said oven cavity, said at least one GC
column module including: a module housing, a capillary
column positioned within said module housing and having
a main coil and a pair of free ends extending from said
main coil, a pair of transfer lines, each coupled to a
respective one of said free ends of said main coil, said
transfer lines for controlling the temperature of said
free ends of said main coil in a region adjacent said
main coil, a heater wire positioned adjacent said
transfer lines, and means for securing said at least one
column module to said first wall; (c) first and second
GC column lengths positioned within said oven cavity,
said first and second GC column lengths extending
between said module and said injector connector, and
said detector connector, respectively; and (d)
temperature control unit external to said oven cavity
and operatively coupled to said heater wire and said
transfer lines.
US 6627454 B2 describes a gas chromatography
method for analyzing materials vaporizable in a gas
chromatograph system, the method including filling a
sample injection device with a sample of the compounds
to be analyzed; transferring the sample compounds into
an analytical separation column with a transfer gas;
passing a carrier gas inside the analytical separation
column for time separation of the sample compounds;
controlling the temperature of the column for achieving
separation of the sample compounds; transferring the
vaporized sample compounds eluted from the column into a
flame ionization detector; providing the gases required
for the operation of the flame ionization detector, and
analyzing the data output of the flame ionization
detector for analysis of the sample compounds, wherein
the gases required for the operation of the gas
chromatograph system are produced by water electrolysis.
In a modification of the method, the gases required for
operation of the gas chromatograph system are produced
by water electrolysis without separating the hydrogen
from the co-produced oxygen. Gas chromatograph systems
for analyzing vaporizable materials are also provided.
It would be advantageous to have an accurate,
safe, economical and compact gas chromatography device
or method for analyzing a gas mixture.
To better address this concern, a first aspect
of the invention provides a portable gas chromatography
device for analyzing a gas mixture, the device
comprising:
- a chromatographic column for separating components of a sample of the gas mixture, the chromatographic column having an inlet and an outlet;
- an air pump coupled to the inlet of chromatographic column for pumping an air to the chromatographic column;
- an injector coupled to the inlet of chromatographic column for feeding the sample through the chromatographic column via the air as carrier gas;
- a detector arranged downstream from the chromatographic column and coupled to the outlet of chromatographic column, the detector being configured for detecting the separated components of the sample, wherein the detector is a semi-conductive microfiber detector;
- an evaluation unit arranged and configured for evaluating each detected component so as to determine a concentration of each detected component.
- a chromatographic column for separating components of a sample of the gas mixture, the chromatographic column having an inlet and an outlet;
- an air pump coupled to the inlet of chromatographic column for pumping an air to the chromatographic column;
- an injector coupled to the inlet of chromatographic column for feeding the sample through the chromatographic column via the air as carrier gas;
- a detector arranged downstream from the chromatographic column and coupled to the outlet of chromatographic column, the detector being configured for detecting the separated components of the sample, wherein the detector is a semi-conductive microfiber detector;
- an evaluation unit arranged and configured for evaluating each detected component so as to determine a concentration of each detected component.
The above measures involve a chromatographic
column for separating components of a sample of the gas
mixture, the chromatographic column having an inlet and
an outlet. The chromatographic column may be an open
tubular capillary columns or a packed Column.
The above measures further involve an air pump
coupled to the inlet of chromatographic column for
pumping an air to the chromatographic column.
The above measures further involve an injector
coupled to the inlet of chromatographic column for
feeding the sample through the chromatographic column
via the air as carrier gas.
The above measures further involve a detector
arranged downstream from the chromatographic column and
coupled to the outlet of chromatographic column, the
detector being configured for detecting the separated
components of the sample, wherein the detector is a
semi-conductive microfiber detector.
The above measures further involve an
evaluation unit arranged and configured for evaluating
each detected component so as to determine a
concentration of each detected component.
Commercial gas chromatography devices often
have large dimensions and are non-portable. Furthermore,
gas chromatography with these devices are often
relatively expensive and time consuming consumption,
limited to analyzing certain gases and may result in
chemical changes of gas samples. Moreover, use of gases
such as hydrogen or helium which are often used may be
dangerous. It is an insight of the inventors that using
a microfiber as the detector and air as the carrier gas
according to the invention enables development of a
compact, economical, safe and accurate gas
chromatography device. Advantageously, a microfiber
detector has micro-dimensions, does not affect
chemically gas samples, acts in the presence of air
humidity. Compare to common commercial GC detectors e.g.
FID, TCD, ECD etc., the microfiber detector is low cost,
easily connectable to the device, with condition time,
acts in low temperature as well as in high temperature
e.g. 30-150 ̊C, doesn’t act selectively and responses to
almost all vapors with different sensitivity.
Optionally, the microfiber detector comprises
a microfiber selected from a group of:
polypyrrole-polyaniline copolymer, polypyrrole-copper
oxide and polypyrrole-mercury.
Optionally, the microfiber detector has a
height of 0.5 centimeter or less and a length of about 5
centimeter or less.
Optionally, the device has a weight of about 3
kilograms or less.
Optionally, the device has a length of about
30 centimeter or less and a height of about 20
centimeter or less.
Optionally, the sample is fed through the
chromatographic column in room temperature and wherein
the air is ambient air.
Optionally, the device further comprises a
programmable heating unit for heating the sample or the
air and wherein the chromatographic column is configured
for separating components of a heated sample.
Optionally, the injector is a multi-adsorbent injector.
Optionally, the evaluation unit comprises a
multimeter configured for measuring variations in a
resistance of the microfiber and thereby determining the
concentration of each detected component.
In a further aspect of the invention, a method
for analyzing a gas mixture is provided, the method
comprising:
- pumping an air to a chromatographic column;
- feeding a sample of the gas mixture through the chromatographic column via the air as carrier gas;
- separating components of the sample in the chromatographic column;
- detecting the separated components of the sample by a detector, wherein the detector is a semi-conductive microfiber detector;
- evaluating each detected component so as to determine a concentration of each detected component.
- pumping an air to a chromatographic column;
- feeding a sample of the gas mixture through the chromatographic column via the air as carrier gas;
- separating components of the sample in the chromatographic column;
- detecting the separated components of the sample by a detector, wherein the detector is a semi-conductive microfiber detector;
- evaluating each detected component so as to determine a concentration of each detected component.
It will be appreciated by those skilled in the
art that two or more of the above-mentioned embodiments,
implementations, methods, and/or aspects of the
invention may be combined in any way deemed useful.
Modifications and variations of the system,
which correspond to the described modifications and
variations of the system, can be carried out by a person
skilled in the art on the basis of the present
description.
These and other aspects of the invention are
apparent from and will be elucidated with reference to
the embodiments described hereinafter. In the drawings,
Figure 1. shows a portable gas chromatography
device 100 for analyzing a gas mixture. The device 100
comprises a chromatographic column 115 for separating
components of a sample 104 of the gas mixture, the
chromatographic column 115 having an inlet and an
outlet. The device 100 further comprises an air pump 110
coupled to the inlet of chromatographic column 115 for
pumping an air 102 to the chromatographic column 115.
The device 100 further comprises an injector 105 coupled
to the inlet of chromatographic column 115 for feeding
the sample 104 through the chromatographic column 115
via the air 102 as carrier gas. The device 100 further
comprises a detector 120 arranged downstream from the
chromatographic column 115 and coupled to the outlet of
chromatographic column 115, the detector 120 being
configured for detecting the separated components 106 of
the sample104, wherein the detector 120 is a
semi-conductive microfiber detector. The device 100
further comprises an evaluation unit 125 arranged and
configured for evaluating each detected component 108 so
as to determine a concentration of each detected
component 108.
Figure 2. shows a portable gas chromatography
device 200 for analyzing a gas mixture. The device 200
may have a weight of about 3 kilograms or less. The
device 200 may have a length of about 30 centimeter or
less and a height of about 20 centimeter or less.
The device 200 comprises a chromatographic
column 226 for separating components of a sample 205 of
the gas mixture, the chromatographic column 226 having
an inlet 225 and an outlet 227. The device 200 further
comprises an air pump 222 coupled to the inlet 225 of
chromatographic column 226 for pumping an air 207 to the
chromatographic column 226. The sample 205 may be fed
through the chromatographic column 226 in room
temperature and the air 207 may be ambient air. The air
207 may be provided by the air pump 222 with flow rate
of, for example, 10 mL min−1.
The device 200 further comprises an injector
224 coupled to the inlet 225 of chromatographic column
226 for feeding the sample 205 through the
chromatographic column 226 via the air 207 as carrier
gas. The injector may be for example a multi-adsorbent injector.
The device 200 further comprises a detector
232 arranged downstream from the chromatographic column
226 and coupled to the outlet 227 of chromatographic
column 226, the detector 232 being configured for
detecting the separated components 231 of the sample
205, wherein the detector 232 is a semi-conductive
microfiber detector. The detector 232 may comprise a
microfiber 236 selected from a group of:
polypyrrole-polyaniline copolymer, polypyrrole-copper
oxide and polypyrrole-mercury. The detector 232 may have
a height of 0.5 centimeter or less and a length of about
5 centimeter or less.
The device 200 further comprises an evaluation
unit 234 arranged and configured for evaluating each
detected component 231 so as to determine a
concentration of each detected component 231. The
evaluation unit 234 may comprise a multimeter configured
for measuring variations in a resistance of the
microfiber 236 and thereby determining the concentration
of each detected component. The microfiber 236 may be
connected to the evaluation unit 234 via connecting
wires 230.
Figure 3. shows a method 300 for analyzing a
gas mixture. The method 300 comprises pumping 310 an air
to a chromatographic column. The method 300 further
comprises feeding 320 a sample of the gas mixture
through the chromatographic column via the air as
carrier gas. The method 300 further comprises separating
330 components of the sample in the chromatographic
column. The method 300 further comprises detecting 340
the separated components of the sample by a detector,
wherein the detector is a semi-conductive microfiber
detector. The method 300 further comprises evaluating
350 each detected component so as to determine a
concentration of each detected component.
Claims (10)
- A portable chromatography device (100, 200) for analyzing a gas mixture, the device (100, 200) comprising:
- a chromatographic column (115, 226) for separating components of a sample (104, 205) of the gas mixture, the chromatographic column (115, 226) having an inlet (225) and an outlet (227);
- an air pump (110, 222) coupled to the inlet (225) of chromatographic column (115, 226) for pumping an air (102, 207) to the chromatographic column (115, 226);
- an injector (105, 224) coupled to the inlet (225) of chromatographic column (115, 226) for feeding the sample (104, 205) through the chromatographic column (115, 226) via the air (102, 207) as carrier gas;
- a detector (120, 232) arranged downstream from the chromatographic column (115, 226) and coupled to the outlet (227) of chromatographic column (115, 226), the detector (120, 232) being configured for detecting the separated components (108, 231) of the sample (104, 205), wherein the detector (120, 232) is a semi-conductive microfiber detector;
- an evaluation unit (125, 234) arranged and configured for evaluating each detected component (108, 231) so as to determine a concentration of each detected component (108, 231). - The device (100, 200) according to claim 1, wherein the microfiber detector (120, 232) comprises a microfiber selected from a group of: polypyrrole-polyaniline copolymer, polypyrrole-copper oxide and polypyrrole-mercury.
- The device (100, 200) according to claim 1 and 2, wherein the microfiber detector (120, 232) has a height of 0.5 centimeter or less and a length of about 5 centimeter or less.
- The device (100, 200) according to any of preceding claims, wherein the device (100, 200) has a weight of about 3 kilograms or less.
- The device (100, 200) according to any of preceding claims, wherein the device (100, 200) has a length of about 30 centimeter or less and a height of about 20 centimeter or less.
- The device (100, 200) according to any of preceding claims, wherein the sample (104, 205) is fed through the chromatographic column (115, 226) in room temperature and wherein the air (102, 207) is ambient air.
- The device (100, 200) according to any of preceding claims, wherein the device (100, 200) further comprises a programmable heating unit for heating the sample or the air (102, 207) and wherein the chromatographic column (115, 226) is configured for separating components of a heated sample.
- The device (100, 200) according to any of preceding claims, wherein the injector (105, 224) is a multi-adsorbent injector.
- The device (100, 200) according to any of preceding claims, wherein the evaluation unit (125, 234) comprises a multimeter configured for measuring variations in a resistance of the microfiber and thereby determining the concentration of each detected component (108, 231).
- A method (300) for analyzing a gas mixture, the method (300) comprising:
- pumping (310) an air to a chromatographic column;
- feeding (320) a sample of the gas mixture through the chromatographic column via the air as carrier gas;
- separating (330) components of the sample in the chromatographic column;
- detecting (340) the separated components of the sample by a detector, wherein the detector is a semi-conductive microfiber detector;
- evaluating (350) each detected component so as to determine a concentration of each detected component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IB2015/056362 WO2017033041A1 (en) | 2015-08-22 | 2015-08-22 | Gas chromatography device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IB2015/056362 WO2017033041A1 (en) | 2015-08-22 | 2015-08-22 | Gas chromatography device and method |
Publications (1)
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| US6530260B1 (en) | 2002-02-04 | 2003-03-11 | Rvm Scientific, Inc. | Gas chromatography analysis system |
| US6627454B2 (en) | 2000-11-05 | 2003-09-30 | Aviv Amirav | Method and system for gas chromatography |
| US20130171687A1 (en) * | 2011-12-28 | 2013-07-04 | Centre Scientifique Et Technique Du Batiment | Development of a detection microsystem |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6627454B2 (en) | 2000-11-05 | 2003-09-30 | Aviv Amirav | Method and system for gas chromatography |
| US6530260B1 (en) | 2002-02-04 | 2003-03-11 | Rvm Scientific, Inc. | Gas chromatography analysis system |
| US20130171687A1 (en) * | 2011-12-28 | 2013-07-04 | Centre Scientifique Et Technique Du Batiment | Development of a detection microsystem |
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| ALIZADEH NAADER ET AL: "Design and Fabrication of Open-Tubular Array Gas Sensors Based on Conducting Polypyrrole Modified With Crown Ethers for Simultaneous Determination of Alkylamines", IEEE SENSORS JOURNAL, IEEE SERVICE CENTER, NEW YORK, NY, US, vol. 15, no. 7, 24 March 2015 (2015-03-24) - July 2015 (2015-07-01), pages 4130 - 4136, XP011582115, ISSN: 1530-437X, [retrieved on 20150519], DOI: 10.1109/JSEN.2015.2411515 * |
| SAJAD PIRSA ET AL: "A selective DMSO gas sensor based on nanostructured conducting polypyrrole doped with sulfonate anion", SENSORS AND ACTUATORS B: CHEMICAL: INTERNATIONAL JOURNAL DEVOTED TO RESEARCH AND DEVELOPMENT OF PHYSICAL AND CHEMICAL TRANSDUCERS, ELSEVIER S.A, CH, vol. 168, 17 April 2012 (2012-04-17) - 20 June 2012 (2012-06-20), pages 303 - 309, XP028509013, ISSN: 0925-4005, [retrieved on 20120417], DOI: 10.1016/J.SNB.2012.04.027 * |
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