CN103293256A - Gas chromatographic analysis apparatus - Google Patents
Gas chromatographic analysis apparatus Download PDFInfo
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- CN103293256A CN103293256A CN2012102925239A CN201210292523A CN103293256A CN 103293256 A CN103293256 A CN 103293256A CN 2012102925239 A CN2012102925239 A CN 2012102925239A CN 201210292523 A CN201210292523 A CN 201210292523A CN 103293256 A CN103293256 A CN 103293256A
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- 238000004587 chromatography analysis Methods 0.000 title claims abstract description 33
- 239000007789 gas Substances 0.000 claims abstract description 131
- 239000001257 hydrogen Substances 0.000 claims abstract description 39
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 39
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000004880 explosion Methods 0.000 claims abstract description 11
- 239000012159 carrier gas Substances 0.000 claims description 61
- 239000006200 vaporizer Substances 0.000 claims description 15
- 238000005259 measurement Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000008016 vaporization Effects 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 9
- 239000011521 glass Substances 0.000 description 9
- 238000005192 partition Methods 0.000 description 8
- 238000004458 analytical method Methods 0.000 description 7
- 150000002431 hydrogen Chemical class 0.000 description 7
- 239000001307 helium Substances 0.000 description 4
- 229910052734 helium Inorganic materials 0.000 description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 4
- 230000008676 import Effects 0.000 description 4
- 238000004817 gas chromatography Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
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Abstract
The invention provides a gas chromatographic analysis apparatus. Under a condition of hydrogen or other inflammable gas as carrying gas or make-up gas, the apparatus is without especially arranging an inflammable gas sensor for detecting the inflammable gas and can raise security. The gas chromatographic analysis apparatus (1) is provided with a column heater (2), comprises a carrying-gas supply part (51) of a first flowmeter (51a) which is used for setting a time interval and measuring a flow rate of the carrying gas and comprises a control part (21). The carrying gas is the inflammable gas. The gas chromatographic analysis apparatus (1) is provided with a storage part (22) for storing a flow threshold for determining existence of the inflammable gas of explosion limit concentration in a housing (10). When the flow rate of the inflammable gas of a chromatographic column (11) supplied by the control part (21) is more than the flow threshold, electric supply to a heater (13) is stopped and hydrogen supply to a sample vaporizing chamber (70) is stopped.
Description
Technical field
The present invention relates to a kind of gas chromatographic analysis device, particularly about the inflammable gas that utilized hydrogen etc. the gas chromatographic analysis device as the make-up gas of the carrier gas of supplying with to chromatographic column or the detecting device of flowing through.
Background technology
In gas chromatographic analysis device, sample gas is pressed into carrier gas, is imported in the chromatographic column from the inlet end of chromatographic column.Thus, by separated at time-axis direction during in the chromatographic column, arrive the endpiece of chromatographic column in each measurement of species that sample gas comprises.At this moment, pass through in the chromatographic column with the temperature of regulation in order to make sample gas, use the column oven that chromatographic column is contained in the temperature of inside, adjustment chromatographic column.
Fig. 2 is the summary pie graph of an example of existing gas chromatographic analysis device.Gas chromatographic analysis device 101 has: column oven 2; Import the sample vaporizer 70 of sample; Supply with the carrier gas controller (carrier gas supply unit) 151 of carrier gas; Detecting device 60; Supply with the make-up gas controller (make-up gas supply unit) 82 of make-up gas ; The computing machine 120 of control column oven 2, carrier gas controller 151 and make-up gas controller 82.
Qianmen 15 is formed left end can be opened and closed as axle, by opened Qianmen 15 by the analyst, can change the chromatographic column 11 of the inside that is incorporated in shell 10 and other chromatographic column.
Again, the top of wall 16 is provided with exhausr port (not shown) overleaf, and at exhausr port, exhaust valve can be formed with opening and closing.Thus, by opening exhaust valve, the air of inside can be discharged to the outside from exhausr port.On the other hand, the middle part of wall 16 is provided with air entry 33 overleaf, and at air entry 33, air-breathing door 37 can be formed with opening and closing.Thus, by opening air-breathing door 37, air outside can be imported to inside from air entry 33.
Then, sample vaporizer 70 and carrier gas controller 151 are described.Fig. 3 is the enlarged cross section figure of sample vaporizer 70 and carrier gas controller 151.
The partition 72a of the silica gel system of substantial cylindrical shape is configured in sample introducing port 72, and partition 72a is by being given as security the attached upper case 71b that is fixed in downwards by nut 72b.About such partition 72a, when the analyst analyzed, the pin 91 of the micro-syringe 90 by will taking in sample S thrust partition 72a, and sample S can splash into the inside of housing 71.And, because partition 72a is resilient, the hole of opening when being inserted by pin 91, the words that pin 91 is taken out are sealed immediately.
In the inside of lower case 71a, dispose glass insert 77a by the sealing ring 77b support of toroidal.About such glass insert 77a, the analyst is when analyzing, by the pin 91 of micro-syringe 90 being configured in the top of the formed inner space of glass insert 77a, sample S gasifies the inner space by glass insert 77a the time from upside to downside.
Again, upper case 71b is by being given as security the attached lower case 71a that is fixed in downwards by sealing nut 77c.
Again, chromatographic column connector 75 is connected the inlet end of chromatographic column 11, and is fixed by chromatographic column nut 75a.
In 52 inclosures of gas supply source carrier gas is arranged.And an end of gas introduction tube connects gas supply source 52, and further the other end of gas introduction tube is connected carrier gas introducing port 73 by first flow meter 51a and operation valve 51b.
According to such formation, by using flowmeter 51a with the setting-up time interval of delta t
1Measure the flow H of carrier gas
1Time control operation valve 51b can adjust the flow H of the carrier gas that is supplied to carrier gas introducing port 73
1
Be connected with an end of gas outlet pipe at diffluence pass 76, further dispose operation valve 51f and shunting outlet 51g at gas outlet pipe.Therefore, when opening operation valve 51f, a certain proportion of flow H
4Carrier gas be discharged from by diffluence pass 76.
Remove mouthfuls 74 ends that are connected with gas outlet pipe, further disposing pressure gauge 51c and the operation valve 51d of the pressure inside that detects housing 71 at gas outlet pipe.Therefore, when opening operation valve 51d, a certain proportion of flow H
3Carrier gas be discharged from by removing mouthfuls 74.
Detecting device 60 for example uses the FID(flame ionization ditector), FPD(hydrogen flame photometric detector (FPD)), the TCD(thermal conductivity detector (TCD)) etc., Yi Bian make flow H
5Make-up gas burning make it to emit on one side.
In gas supply source 81, enclose make-up gas is arranged.And gas supply source 81 connects an end of gas introduction tube, and further the other end of gas introduction tube is connected on the detecting device 60 by operation valve 82a, pressure transducer 82b and resistance tube 82c.
By such formation, by on one side with the setting-up time interval of delta t
1Measurement is at the flow H of the make-up gas of pressure transducer 82b and resistance tube 82c
2 Control operation valve 82a on one side, can adjust the flow H of the make-up gas that supplies to detecting device 60
2
About computing machine 120, have the CPU(control part) 121, storer (storage part) 122, further be connected with the input media 23 that comprises keyboard, mouse etc., and display device 24.Again, when the processing capacity modularization of CPU121 is described, its have control heater 13 grades temperature control part 121a, control radial fan 14 the 121b of fan control portion, control carrier gas controller 151 and make-up gas controller 82 the 121c of flow control portion, receive the 121d of analysis and Control portion of the signal of self-detector 60.
The 121c of flow control portion is " the flow F " of " linear velocity is certain " by the flow by input media 23 input carrier gases, and control operation valve 51b, operation valve 51f, operation valve 51d are so that by obtaining with the setting-up time interval of delta t
1By the measured flow H of flowmeter 51a
1And become " flow F " for " linear velocity is certain "; The perhaps 121c of flow control portion, be " pressure P " of " pressure is certain " by the flow by input media 23 input carrier gases, control operation valve 51b, operation valve 51f, operation valve 51d are in order to become " pressure P " for " pressure is certain " by obtaining with setting-up time interval of delta t 1 by the measured pressure of pressure gauge 51c.
Again, " linear velocity is certain " refers to control and makes in the unit interval volume of carrier gas of the sectional area by chromatographic column 11 for certain.Again, " pressure is certain " refers to control and makes that by the detected pressure of pressure gauge 51c be certain.
Again, according to being analyzed with temperature and analysis time by input media 23 inputs, be supplied to 13 pairs of air of well heater and heat by the temperature control part 121a electric power of will switching on, be supplied to motor and make radial fan 14 rotation by the 121b of the fan control portion electric power of will switching on, thereby make heated air circulation, can be so that the inside of shell 10 be the analysis temperature of homogeneous.At this moment, temperature control part 121a, by closing exhaust valve and air-breathing door 37, and makes to the energising electric power of well heater 13 and rises than analyzing when low with temperature in the temperature of shell 10, and air is added Hot.On the other hand, when the temperature inside of shell 10 uses temperature high than analysis, reduce by making to the energising electric power of well heater 13, and open exhaust valve and air-breathing door 37, import the air of outside room temperature from air entry 33, and the portion of air that will be heated is discharged to the outside from exhausr port.
Yet, as the carrier gas that is enclosed in gas supply source 52 or be enclosed in the make-up gas of gas supply source 82, utilize helium more.This be because, from the performance of the chromatographic column 11 that is called as number of theoretical plates, be the main points of allocative efficiency, other gas comparison such as helium and nitrogen, argon, more preferably or more stable.But owing to worry helium meeting resource exhaustion, its price has the tendency of rising.
Therefore, because hydrogen is excellent equally with helium on the main points of theoretical hop count, so from the viewpoint of the operating cost analyzed, wish consumingly to utilize hydrogen as carrier gas or make-up gas .
Yet, in gas chromatographic analysis device 101, can not lack the replacing etc. of the chromatographic column 11 of the replacing of the partition 72a of sample vaporizer 70 or glass insert 77a or column oven 2, daily maintenance.Therefore, exist and change the back in the situation that the connecting portion appearance is lax or sealing is not enough of partition 72a, glass insert 77a or chromatographic column 11 etc., also exist carrier gas to escape to the situation of the inside of column oven 10 from the connecting portion of partition 72a, glass insert 77a or chromatographic column 11 etc.Therefore, when carrier gas was hydrogen, owing to surpass explosion limits concentration in the inside of the high temperature of shell 10, the explosion hazard height was so avoid the use of hydrogen.Think that the explosion limits concentration of hydrogen is about 4% again.
Therefore, disclose when the hydrogen of use is arranged as carrier gas the scheme (for example, with reference to patent documentation 1) of the gas chromatographic analysis device of the countermeasure of the situation that employing hydrogen spills.In such gas chromatographic analysis device, detect the hydrogen that comprises at the gas that has reclaimed from the inside of column oven by hydrogen gas sensor, when the leakage that detects hydrogen, supply is stopped as the hydrogen formation apparatus of the hydrogen of carrier gas.
The background technology document
Patent documentation
Patent documentation 1: TOHKEMY 5-346424 communique
Summary of the invention
The problem that invention will solve
But, adopt gas chromatography instrument apparatus as described above, hydrogen gas sensor need be set especially.
The means of dealing with problems
The present inventor are in order to solve above-mentioned problem, to about utilizing under hydrogen or the situation of other inflammable gas as carrier gas or make-up gas , the method that does not need the combustible gas sensor of surveying inflammable gas to be set especially and can to improve security is studied.Therefore, found that flow by making the inflammable gas of supplying with to chromatographic column 11 for being discharged to below the flow α of outside gas in the inside from the shell 10 of column oven 2, can prevent from surpassing explosion limits concentration at the inside of shell 10 inflammable gas.
That is, analysis of hplc device of the present invention has: column oven, it comprises shell, be configured in described shell inside chromatographic column and in the inside of described shell heater for heating air; The sample vaporizer, it is with the inlet end of sample-feed to described chromatographic column; The carrier gas supply unit, it supplies to described sample vaporizer with carrier gas, and has the first flow in the flow of this carrier gas of setting-up time interval measurement; Detecting device, it is connected the endpiece of described chromatographic column; Control part, it controls described well heater and carrier gas supply unit; Described gas chromatographic analysis device is characterised in that, described carrier gas is inflammable gas, described gas chromatographic analysis device has storage part, described storage portion stores is used for judgement at the flow threshold of the existence of the inflammable gas of the explosion limits concentration of the inside of described shell, be that flow threshold is when above at the flow of the inflammable gas that supplies to described chromatographic column, described control part makes to supply with to the electric power of described well heater and stops, and makes to the supply of the hydrogen of described sample vaporizer and stop.
Here, " setting-up time at interval " is time interval arbitrarily, for example, and the time interval that is predetermined according to the detection speed of flowmeter.
According to gas chromatographic analysis device of the present invention, control part is judged the inflammable gas that has explosion limits concentration in the inside of shell under the flow of the inflammable gas that supplies to chromatographic column is situation more than the flow threshold.Control part confirms to exist in the inside of shell the inflammable gas of explosion limits concentration, makes at once to the electric power supply of well heater to stop, and the supply of hydrogen is stopped.Therefore, the temperature inside of column oven descends, and is discharged to the outside owing to be present in the inflammable gas of the inside of shell, can avoid the danger of igniting.
The invention effect
As mentioned above, according to gas chromatographic analysis device of the present invention, utilizing under hydrogen or the situation of other inflammable gas as carrier gas or make-up gas , can not need to arrange especially combustible gas sensor and improve security.Can prevent that chromatographic column is shone at high temperature and the situation of deterioration under the state that has cut off carrier gas again.
(being used for solving device and the effect of other problem)
Again, in above-mentioned invention, described sample vaporizer have with inflammable gas supply to described chromatographic column inlet end the supply stream and inflammable gas is discharged to outside discharge stream, described carrier gas supply unit has second flowmeter of flow that circulates in the inflammable gas of described discharge stream with the setting-up time interval measurement, be that flow threshold is when above at the flow after deduct the flow measured by described second flowmeter by the measured flow of described first flow meter, described control part makes to supply with to the electric power of described well heater and stops, and makes to the supply of the hydrogen of the inlet end of described chromatographic column and stop.
And, in above-mentioned invention, has the make-up gas supply unit, described make-up gas supply unit supplies to described detecting device with make-up gas , and has the 3rd flowmeter with the flow of this make-up gas of setting-up time interval measurement, described make-up gas is inflammable gas, from the flow measured by described first flow meter with to deduct the flow measured by described second flowmeter and the flow behind the employed flow of described detecting device by the total flow of the measured flow of described the 3rd flowmeter be that flow threshold is when above, described control part makes to supply with to the electric power of described well heater and stops, and makes to the supply of the hydrogen of the inlet end of described chromatographic column and stop.
Here, " the 3rd flowmeter " can get final product at the flow of setting-up time interval measurement make-up gas , also can replace with the combination of pressure gauge and resistance tube using.
Further, in above-mentioned invention, described control part is based on than the described setting-up time flow that obtains of long time interval measurement at interval, makes to supply with to the electric power of described well heater to stop, and makes to the supply of the hydrogen of the inlet end of described chromatographic column and stop.
Description of drawings
Fig. 1 is the summary pie graph of an example of the gas chromatographic analysis device that the present invention relates to.
Fig. 2 is the summary pie graph of an example of existing gas chromatographic analysis device.
Fig. 3 is the enlarged cross section figure of sample vaporizer and carrier gas controller.
Symbol description
1 gas chromatographic analysis device
2 column ovens
10 shells
11 chromatographic columns
13 well heaters
21 control parts
22 storeies (storage part)
51 carrier gas controllers (carrier gas supply unit)
51a first flow meter
60 detecting devices
70 sample vaporizers
Embodiment
Below, with accompanying drawing embodiments of the present invention are described.Again, the present invention is not limited to the such embodiment of following explanation, and the variety of way in the scope that does not break away from aim of the present invention is also contained in the present invention.
Fig. 1 is the summary pie graph of an example of the gas chromatographic analysis device that the present invention relates to.Again, the part about same with above-mentioned gas chromatographic analysis device 101 adopts identical symbol.
Gas chromatographic analysis device 1 has: column oven 2; Import the sample vaporizer 70 of sample; Supply with the carrier gas controller (carrier gas supply unit) 51 of carrier gas; Detecting device 60; Supply with the make-up gas controller (make-up gas supply unit) 82 of make-up gas ; The computing machine 20 of control column oven 2, carrier gas controller 51 and make-up gas controller 82.
And in gas supply source 52,81 involved in the present invention, enclosing has hydrogen.
Be connected with an end of gas outlet pipe at diffluence pass 76, further dispose operation valve 51f, shunting outlet 51g and the second flowmeter 51i at gas outlet pipe.Therefore, when opening operation valve 51f, a certain proportion of flow H
4Carrier gas be discharged from by diffluence pass 76.Again, the second flowmeter 51i is with the setting-up time interval of delta t
1(for example, 6,18,240,360 ms intervals) measure the flow H of carrier gas
4
Again, the second flowmeter 51i, 51h come calculated flow rate according to the pressure of pressure gauge 51c and flow path resistance or the valve opening and closing speed of operation valve 51f, 51d, can become the flowmeter of imagination.
Remove mouthfuls 74 ends that are connected with gas outlet pipe, further disposing pressure gauge 51c, operation valve 51d and the second flowmeter 51h of the pressure inside that detects housing 71 at gas outlet pipe.Therefore, when opening operation valve 51d, a certain proportion of flow H
3Carrier gas be discharged from by removing mouthfuls 74.Again, the second flowmeter 51h is with the setting-up time interval of delta t
1(for example, 6,18,240,360 ms intervals) measure the flow H of carrier gas
3
About computing machine 20, have the CPU(control part) 21, storer (storage part) 22, further be connected with the input media 23 and the display device 24 that comprise keyboard or mouse etc.Again, when the processing capacity modularization of CPU21 is described, its have control heater 13 grades temperature control part 21a, control radial fan 14 the 21b of fan control portion, control carrier gas controller 51 and make-up gas controller 82 the 21c of flow control portion, receive the 21d of analysis and Control portion of the signal of self-detector 60.
In storer 22, store the flow threshold α 1(500mL/min for example of existence of the hydrogen of explosion limits concentration for the inside of judging shell 10 (for example 4%) in advance).Flow threshold α 1 is the flow that is discharged to outside gas from the inside of the shell 10 of column oven 2, waits the structure (size in gap) according to shell 10 to be predetermined and to be stored in the storer 22 by the deviser.
The 21c of flow control portion is " the flow F " of " linear velocity is certain " by the flow by input media 23 input carrier gases, and control operation valve 51b, operation valve 51d, operation valve 51f are so that by obtaining with the setting-up time interval of delta t
1By the measured flow H of flowmeter 51a
1And become " flow F " for " linear velocity is certain "; The perhaps 21c of flow control portion, be " pressure P " of " pressure is certain " by the flow by input media 23 input carrier gases, control operation valve 51b, operation valve 51d, operation valve 51f are in order to become " pressure P " for " pressure is certain " by obtaining with setting-up time interval of delta t 1 by the measured pressure of pressure gauge 51c.
Again, the 21c of flow control portion is by obtaining in analysis with the setting-up time interval of delta t
1Flow H by first flow meter 51a measurement
1, the flow H that measured by the second flowmeter 51h
3, the flow H that measured by the second flowmeter 51i
4With the pressure of being measured by pressure transducer 82b, shown in following formula (1), with the setting-up time interval of delta t
1Judgement is from flow H
1With pressure transducer 82b and by resistance tube 82c(the 3rd flowmeter) the flow H that calculates
2Total flow (H
1+ H
2) deduct flow H
3, flow H
4With at detecting device 60 employed flow H
5After flow whether be that flow threshold α is more than 1.And, judge that flow threshold is when α 1 is above, at inlet end and the detecting device 60 of chromatographic column 11, control operation valve 51b, operation valve 82a stop the supply of hydrogen at once, and make to supply with to the electric power of well heater 13 to temperature control part 21a output signal and stop at once.At this moment, the discharge for the hydrogen that promoted to accumulate in the inside of shell 10 can make the rotational speed of radial fan 14 rise to increase air quantity.
(H
1+H
2)-(H
3+H
4+H
5)≥α
1…(1)
As mentioned above, according to gas chromatographic analysis device 1 of the present invention, under the situation of utilizing hydrogen as carrier gas, make-up gas , do not need to arrange especially hydrogen gas sensor and can improve security.Can prevent that chromatographic column 11 is shone at high temperature and the situation of deterioration under the state that has cut off carrier gas again.
＜other embodiment 〉
＜1〉in above-mentioned gas chromatography instrument apparatus 1, though show the formation that inlet end and detecting device 60 in chromatographic column 11 stop the supply of hydrogen, but owing to when detecting device 60 is not FID, FPD or TCD, do not need to supply with hydrogen, also can be based on following formula (2) and make to the supply of the hydrogen of the inlet end of chromatographic column 11 and stop such formation.
H
1-(H
3+H
4)≥α
1 …(2)
＜2〉in above-mentioned gas chromatographic analysis device 1, though show based on formula (1) in the formation that inlet end and the detecting device 60 of chromatographic column 11 stops the supply of hydrogen, also can be based on formula (3) and make the supply of hydrogen stop such formation at inlet end and the detecting device 60 of chromatographic column 11.At this moment do not need to arrange the second flowmeter 51h and the second flowmeter 51i again.
(H
1+H
2)-H
5≥α
1…(3)
＜3〉in above-mentioned gas chromatographic analysis device 1, though show based on formula (1) in the formation that inlet end and the detecting device 60 of chromatographic column 11 stops the supply of hydrogen, also can be based on formula (4) and make the supply of hydrogen stop such formation at inlet end and the detecting device 60 of chromatographic column 11.
(H
1* Δ t
2+ H
2* Δ t
2)-(H
3* Δ t
2+ H
4* Δ t
2+ H
5* Δ t
2) 〉=α
1* Δ t
2(4) still, (Δ t
2/ Δ t
1)=n, n are positive integers.
Again, at this moment, can be with the setting-up time interval of delta t
1Judge whether its flow is flow threshold α
1More than, also can be with the setting-up time interval of delta t
2Judge whether its flow is flow threshold α
1More than.
According to such gas chromatography instrument apparatus, even circulation surpasses α in the short time
1The gas of mL/min is by limiting gas flow before and after it at α
1Below the mL/min, utilize the concentration of hydrogen of the inside of shell 10 not reach explosion limits concentration, can increase flow in the short time.
Industrial can usability
The present invention can apply to gas chromatographic analysis device.
Claims (4)
1. gas chromatographic analysis device has:
Column oven, it comprises shell, be configured in described shell inside chromatographic column and in the inside of described shell heater for heating air;
The sample vaporizer, it is with the inlet end of sample-feed to described chromatographic column;
The carrier gas supply unit, it supplies to described sample vaporizer with carrier gas, and has the first flow in the flow of this carrier gas of setting-up time interval measurement;
Detecting device, it is connected the endpiece of described chromatographic column;
Control part, it controls described well heater and carrier gas supply unit;
Described gas chromatographic analysis device is characterised in that,
Described carrier gas is inflammable gas,
Described gas chromatographic analysis device has storage part, and described storage portion stores is used for judgement at the flow threshold of the existence of the inflammable gas of the explosion limits concentration of the inside of described shell,
Be flow threshold when above at the flow of the inflammable gas that supplies to described chromatographic column, described control part makes to supply with to the electric power of described well heater and stops, and makes to the supply of the hydrogen of described sample vaporizer and stop.
2. gas chromatographic analysis device as claimed in claim 1 is characterized in that,
Described sample vaporizer have with inflammable gas supply to described chromatographic column inlet end the supply stream and inflammable gas is discharged to outside discharge stream,
Described carrier gas supply unit has second flowmeter of flow that circulates in the inflammable gas of described discharge stream with the setting-up time interval measurement,
Be that flow threshold is when above at the flow after deduct the flow measured by described second flowmeter by the measured flow of described first flow meter, described control part makes to supply with to the electric power of described well heater and stops, and makes to the supply of the hydrogen of the inlet end of described chromatographic column and stop.
3. gas chromatographic analysis device as claimed in claim 1 is characterized in that,
Have the make-up gas supply unit, described make-up gas supply unit supplies to described detecting device with make-up gas , and has the 3rd flowmeter with the flow of this make-up gas of setting-up time interval measurement,
Described make-up gas is inflammable gas,
From the flow measured by described first flow meter with to deduct the flow measured by described second flowmeter and the flow behind the employed flow of described detecting device by the total flow of the measured flow of described the 3rd flowmeter be that flow threshold is when above, described control part makes to supply with to the electric power of described well heater and stops, and makes to the supply of the hydrogen of the inlet end of described chromatographic column and stop.
4. as each described gas chromatographic analysis device among the claim 1-3, it is characterized in that, described control part is based on the flow that obtains with the time interval measurement of growing at interval than described setting-up time, make to supply with to the electric power of described well heater to stop, and make to the supply of the hydrogen of the inlet end of described chromatographic column and stop.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-038634 | 2012-02-24 | ||
| JP2012038634A JP5845966B2 (en) | 2012-02-24 | 2012-02-24 | Gas chromatograph |
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|---|---|
| CN103293256A true CN103293256A (en) | 2013-09-11 |
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| JP6160526B2 (en) * | 2014-03-19 | 2017-07-12 | 株式会社島津製作所 | Gas chromatograph apparatus and gas chromatograph analysis system |
| JP6493011B2 (en) * | 2015-06-23 | 2019-04-03 | 株式会社島津製作所 | Gas chromatograph |
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| CN104655570A (en) * | 2015-02-03 | 2015-05-27 | 北京航星网讯技术股份有限公司 | Method for achieving passive laser detection on oil-gas mixed gases under various conditions |
| CN104655570B (en) * | 2015-02-03 | 2017-06-20 | 北京航星网讯技术股份有限公司 | The method that the passive laser acquisition of oil gas class mixed gas is realized under the conditions of various |
| CN106168613A (en) * | 2015-05-21 | 2016-11-30 | 株式会社岛津制作所 | Chromatograph incubator and use the chromatograph of this incubator |
| CN109073609A (en) * | 2016-06-30 | 2018-12-21 | 株式会社岛津制作所 | flow controller |
| CN109073609B (en) * | 2016-06-30 | 2020-10-09 | 株式会社岛津制作所 | Flow controller |
| CN107589211A (en) * | 2016-07-06 | 2018-01-16 | 株式会社岛津制作所 | Gas chromatograph |
| CN107589211B (en) * | 2016-07-06 | 2020-10-09 | 株式会社岛津制作所 | Gas chromatograph |
| CN108872457A (en) * | 2017-05-09 | 2018-11-23 | 株式会社岛津制作所 | Gas chromatograph column oven and the gas phase chromatographic device for using it |
| CN108872456A (en) * | 2017-05-12 | 2018-11-23 | 株式会社岛津制作所 | Gas chromatograph column oven and the gas phase chromatographic device for using it |
| CN107727765A (en) * | 2017-10-09 | 2018-02-23 | 国家电网公司 | Oiling test gas circuit controller and oiling test gas circuit |
| CN110297058A (en) * | 2018-03-23 | 2019-10-01 | 常志兴 | A kind of multi-field gas chromatograph detector and gas chromatography |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013174490A (en) | 2013-09-05 |
| JP5845966B2 (en) | 2016-01-20 |
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