JP3179280U - Collection and release device for improving heart-cutting technology of gas chromatograph - Google Patents

Collection and release device for improving heart-cutting technology of gas chromatograph Download PDF

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JP3179280U
JP3179280U JP2012004910U JP2012004910U JP3179280U JP 3179280 U JP3179280 U JP 3179280U JP 2012004910 U JP2012004910 U JP 2012004910U JP 2012004910 U JP2012004910 U JP 2012004910U JP 3179280 U JP3179280 U JP 3179280U
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洪亮 鹿
靜 于
凱 林
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福建中烟工業有限責任公司
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Abstract

【課題】ガスクロマトグラフのハートカット技術機能向上用の捕集放出装置を提供する。
【解決手段】ガスクロマトグラフのハートカット技術機能向上用の捕集放出装置において、該装置は、サンプル注入口１に連結するハートカット器３と、ハートカット器３に連結する質量分析検出器を含む。ハートカット器３は二本のカラムに分離され、その内の一本のカラム上に捕集放出装置５を設置する。本装置はさらにバルブ流路制御装置７を含み、バルブ流路制御装置７は連結カラムを介してハートカット器３と質量分析検出器に連結される。前記捕集放出装置５は、ハートカット器３とバルブ流路制御装置７に連結するカラム上に設置される。該装置は、低コスト、小型化、機能向上を実現し、複数回ハートカットした化学成分を同時に分析し、一回のサンプル注入で分析目的を達成する長所を有する。
【選択図】図２The present invention provides a collection / release device for improving the heart-cutting technical function of a gas chromatograph.
A collection / release device for improving the heart cut technology function of a gas chromatograph includes a heart cut device 3 connected to a sample inlet 1 and a mass spectrometry detector connected to the heart cut device 3. . The heart cut device 3 is separated into two columns, and a collection / release device 5 is installed on one of the columns. The apparatus further includes a valve flow path control device 7, which is connected to the heart cut device 3 and the mass spectrometry detector via a connection column. The collection / release device 5 is installed on a column connected to the heart cut device 3 and the valve flow path control device 7. The apparatus has the advantages of realizing low cost, downsizing, and functional improvement, and simultaneously analyzing chemical components that have been heart-cut a plurality of times, and achieving the analysis purpose with a single sample injection.
[Selection] Figure 2

Description

本考案は、ガスクロマトグラフの質量分析分野に関し、ガスクロマトグラフのハートカット技術機能向上用の捕集放出装置に係る。   The present invention relates to the field of mass spectrometry of gas chromatographs, and relates to a collection and release device for improving the heart cut technology function of gas chromatographs.

ガスクロマトグラフのハートカット技術は、二本のカラムの極性の違いを利用して、複雑なサンプルに対する分離能力及びその微量成分の測定感度を高めるものである。一般に、低極性の第一カラムにおいて沸点の高低に基づき分離を行い、ハートカット技術を通して目標化合物の存在する組成部分を選択し、さらに極性の第二カラムで分離を行い好ましい分離効果を得る。   The gas chromatograph heart-cutting technique uses the difference in polarity between two columns to increase the separation ability for a complex sample and the measurement sensitivity of its trace components. In general, separation is performed on the basis of the boiling point in a low polarity first column, a composition portion where the target compound is present is selected through a heart-cut technique, and further separation is performed in a polar second column to obtain a preferable separation effect.

現在、ハートカット器を取付けて商品化したガスクロマトグラフの質量分析検出器は図１に示すとおりであり、該装置にはサンプル注入口１と連結するハートカット器３の第一カラム２、ハートカット器３で分離された第一連結カラム４と第二カラム１５、この二本のカラムはそれぞれ質量分析検出器(MS)１６と水素炎イオン検出器(FID)１７、或いは窒素・リン検出器(NPD)またはその他伝統的な検出器（この種の検出器は化合物に対して迅速な定性を行い、未知化合物のマススペクトルを得ることはできない）を含む。尚、商品化したガスクロマトグラフ質量分析検出器のハートカット技術には次のような欠点がある。ハートカット後に分離した二本のカラム４、１５は、ただいずれか一本のカラム内の化学成分を質量分析検出器１６に入れられるが、他の一本のカラム内の化学成分は連結カラム４、水素炎イオン検出器(FID)１７或いは窒素・リン検出器(NPD)やその他伝統的な検出器を通過し、同時に一台の質量分析検出器での分析は不可能である。質量分析検出器一台を増設することにより、ハートカット後に分離させた二本のカラムをそれぞれ二台の質量分析検出器によって分析する目的を達成するが、一台増設する質量分析検出器と、この機能を制御する新ソフト開発のための費用が必要となる。   The mass spectrometric detector of a gas chromatograph that has been commercialized with a heart-cut device as shown in FIG. 1 is as shown in FIG. 1. The apparatus includes a first column 2 of a heart-cut device 3 connected to a sample inlet 1, The first connected column 4 and the second column 15 separated by the vessel 3 are a mass spectrometry detector (MS) 16 and a flame ion detector (FID) 17, or a nitrogen / phosphorus detector (respectively). NPD) or other traditional detectors (this type of detector provides rapid qualification for compounds and cannot obtain mass spectra of unknown compounds). In addition, the heart cut technique of the commercialized gas chromatograph mass spectrometry detector has the following drawbacks. In the two columns 4 and 15 separated after the heart cut, only one chemical component in one column can be put into the mass spectrometry detector 16, but the chemical component in the other one column is connected to the connected column 4. It passes through a flame ion detector (FID) 17 or a nitrogen / phosphorus detector (NPD) and other traditional detectors, and analysis with a single mass spectrometric detector is impossible at the same time. By adding one mass spectrometry detector, the purpose of analyzing two columns separated by two mass spectrometry detectors each after the heart cut is achieved, but one mass spectrometry detector, Expenses are required for developing new software that controls this function.

公知技術に存在する問題点に鑑み、本考案は、ガスクロマトグラフのハートカット技術機能向上用の捕集放出装置を提供することを目的とする。該装置は、低コスト、小型化、機能向上を実現し、複数回ハートカットした化学成分を同時に分析し、一回のサンプル成分実施で分析目的を達成する長所を有する。   In view of the problems existing in the known technology, an object of the present invention is to provide a collection / release device for improving the heart cut technology function of a gas chromatograph. The apparatus has the advantages of realizing low cost, miniaturization, and functional improvement, and simultaneously analyzing chemical components that have been heart-cut a plurality of times, and achieving the analysis purpose by performing sample components once.

上述の目的を実現するために、本考案の採用する手段は次のとおりである。   In order to realize the above-described object, means employed by the present invention are as follows.

ガスクロマトグラフのハートカット技術機能向上用の捕集放出装置において、該装置はサンプル注入口に連結するハートカット器と、ハートカット器に連結する質量分析検出器を含む。ハートカット器は二本のカラムに分離され、その内の一本のカラム上に捕集放出装置を設置する。   In the collection / release device for improving the heart-cutting technology function of a gas chromatograph, the device includes a heart-cut device connected to a sample inlet and a mass spectrometry detector connected to the heart-cut device. The heart-cut device is separated into two columns, and a collection / release device is installed on one of the columns.

本装置はさらにバルブ流路制御装置を含み、バルブ流路制御装置は連結カラムを介してハートカット器と質量分析検出器に連結される。前記捕集放出装置は、ハートカット器とバルブ流路制御装置に連結するカラム上に設置される。   The apparatus further includes a valve flow path control device, and the valve flow path control device is connected to the heart cut device and the mass spectrometric detector via a connection column. The collection and discharge device is installed on a column connected to a heart cut device and a valve flow path control device.

前述した本考案の効果は次のとおりである。
ガスクロマトグラフのハートカット技術の捕集放出装置を用いて、装置操作者の要求に基づきハートカット後に流出したさらに分離する必要のある化学成分、別のカラム内の分離効果が比較的良い化学成分を質量分析検出器に入れ分析検出完成後、更に質量分析検出器に放出して更なる分離を行う。これにより、二本のカラムにより分離される化学成分を同時に質量分析検出器に入れスペクトルが重なり合うのを防ぐ。ガスクロマトグラフのハートカット後の第一連結カラムと第二カラムはバルブ流路制御装置を介して同一台の質量分析検出器上に連結され、二本のカラムが分離した化学成分は同一台の質量分析検出器上で分析されて、定性定量が行われる。よって、該装置は、低コスト、小型化、機能向上を実現し、複数回ハートカットした化学成分を同時に分析し、一回のサンプル注入で全てのサンプル成分分析の目的を達成する効果を有する。 The effects of the present invention described above are as follows.
Using a gas chromatograph heart-cut technology collection / release device, chemical components that have flowed out after heart-cutting and that have a relatively good separation effect in another column are requested based on the requirements of the operator. After completion of analysis detection in the mass spectrometric detector, it is further discharged to the mass spectrometric detector for further separation. As a result, chemical components separated by the two columns are simultaneously put into the mass spectrometry detector to prevent the spectra from overlapping. The first connected column and second column after heart-cutting of the gas chromatograph are connected to the same mass spectrometer through a valve flow control device, and the chemical components separated by the two columns are the same mass. Qualitative quantification is performed by analysis on an analytical detector. Therefore, this apparatus has an effect of realizing low cost, miniaturization, and function improvement, analyzing chemical components heart-cut a plurality of times at the same time, and achieving the purpose of all sample component analysis by one sample injection.

公知技術における商品化されたガスクロマトグラフ-質量分析検出器の構造図である。FIG. 2 is a structural diagram of a commercialized gas chromatograph-mass spectrometry detector in a known technique. 本考案の捕集放出装置及びバルブ流路制御装置を備えたガスクロマトグラフ−質量分析検出器の構造図である。1 is a structural diagram of a gas chromatograph-mass spectrometry detector equipped with a collection / release device and a valve flow path control device of the present invention. FIG.

次に、図面を参照とする実施例により本考案を説明する。   The invention will now be described by way of example with reference to the drawings.

図２に示したガスクロマトグラフのハートカット技術機能向上用の捕集放出装置において、該装置は、サンプル注入口１に連結するハートカット器３の第一カラム２、ハートカット器３に連結する第一連結カラム４と第二カラム６、及びバルブ流路制御装置７と質量分析検出器９の第二連結カラム８、二本のカラム（第一連結カラム４と第二カラム６）分離された化学成分はすべて同一台の質量分析検出器上で分析されて、定性定量が行われる。本考案の装置はその内の第二カラム６上に、ハートカット後に流出する化学成分に対して捕集と放出を行う一組以上の捕集放出装置５を設置する。   In the collection / release device for improving the heart-cutting technology function of the gas chromatograph shown in FIG. 2, the device is connected to the first column 2 of the heart-cutting device 3 connected to the sample inlet 1 and the heart-cutting device 3. One connected column 4 and second column 6, second flow connected column 8 of valve flow control device 7 and mass spectrometric detector 9, two columns (first connected column 4 and second column 6) separated chemistry All components are analyzed on the same mass spectrometry detector for qualitative quantification. The apparatus of the present invention has one or more sets of collection / release devices 5 for collecting and releasing chemical components flowing out after the heart cut on the second column 6.

本装置のバルブ流路制御装置７は多くの接続変換部を有し、第一連結カラム４、第二カラム６第二連結カラム８を経てハートカット器３と質量分析検出器９に連結する。前記捕集放出装置５はハートカット器３とバルブ流路制御装置７に連結する第二カラム６上に設置する。   The valve flow path control device 7 of this apparatus has many connection conversion parts, and is connected to the heart cut device 3 and the mass spectrometry detector 9 through the first connection column 4, the second column 6 and the second connection column 8. The collection / release device 5 is installed on the second column 6 connected to the heart cut device 3 and the valve flow path control device 7.

本考案の捕集放出装置５の捕集装置は、液体窒素、液体二酸化炭素、液体アンモニア、フロン等の冷媒を直接用いて流出した化学成分の捕集を行う装置、或いは液体窒素、液体二酸化炭素、液体アンモニア、フロン等の冷媒を冷却媒体として窒素ガスやヘリウムガス等の気体を冷却し、さらに冷却後の窒素ガスやヘリウムガス等の気体を用いて流出した化学成分の捕集を行う装置、或いは温度降下作用を備えた電子捕集装置を指す。   The collection device of the collection and release device 5 of the present invention is a device for collecting chemical components that have flowed out directly using a refrigerant such as liquid nitrogen, liquid carbon dioxide, liquid ammonia, or chlorofluorocarbon, or liquid nitrogen, liquid carbon dioxide. , An apparatus that cools a gas such as nitrogen gas or helium gas using a refrigerant such as liquid ammonia or chlorofluorocarbon as a cooling medium, and further collects chemical components that flow out using a gas such as nitrogen gas or helium gas after cooling; Or the electron collection apparatus provided with the temperature fall effect | action is pointed out.

本考案の捕集放出装置５の放出装置は、直接的または間接的に、空気、窒素ガス、ヘリウムガス或いはその他気体を加熱した後に流出した化学成分に対して迅速放出を行う装置、或いは加熱作用を備えた電子加熱装置が流出した化学成分に対して迅速放出を行う装置を指す。   The discharge device of the collection and discharge device 5 of the present invention is a device that quickly or indirectly releases chemical components that have flowed out after heating air, nitrogen gas, helium gas or other gas, directly or indirectly, or a heating action. The apparatus which performs quick discharge | release with respect to the chemical component which the electronic heating apparatus provided with flowed out.

本考案の捕集放出装置５は、ハートカット分離後の化学成分に対し一回或いは連続多数回の捕集放出を行い、別の一本或いは多数本のカラムによって更なる分離を行うことができる。ハートカットにより分離させた化学成分に対し、一回或いは連続多数回の捕集及び放出を行う時、同一の捕集、放出位置で、捕集、放出をそれぞれ行い、同時進行はできず、捕集、放出時間は設定できる。   The collection / release apparatus 5 of the present invention can collect and release the chemical components after heart-cut separation once or continuously many times, and can perform further separation by another single or multiple columns. . When chemical components separated by heart-cutting are collected and released once or continuously many times, they are collected and released at the same collection and release positions. Collection and release time can be set.

(１)まず、ガスクロマトグラフのハートカット後に分離した第二カラム６上には捕集放出装置５を取付ける。本実施例の捕集放出装置５中の捕集装置は液体窒素を冷却媒体として用いて高純度窒素ガスを冷却し、さらに冷却後の窒素ガスを第二カラム６上に吹き付けてハートカット後に流出した化学成分の捕集を行う。該装置の捕集時間は自由に設定できる。同時に、バルブ流路制御装置７と第二連結カラム８を用いてガスクロマトグラフのハートカット後の二本のカラム４、６を同一台の質量分析検出器９上に連結する。
(２)その後、実験の要求に応じてカットを必要とし更なる分離を必要とする成分を第二カラム６に導き、同時に捕集放出装置５の捕集装置を起動させ流出した化学成分を捕集する。その他カット不要な化学成分は第一連結カラム４を通過して直接、質量分析検出器９に入り、分析され定性定量が行われる。
(３)捕集終了後、第一連結カラム４中の化学成分を質量分析検出器９中で分析した後、捕集放出装置５の捕集装置が起動し、電気加熱モジュールで加熱後の空気、窒素ガス、ヘリウムガス、或いはその他気体を直接用いてパージし、捕集した化学成分は迅速に第二カラム６中に放出されてさらなる分離が行われる。分離後の化学成分は質量分析検出器９に入り定性定量が行われる。 (1) First, the collection / release device 5 is mounted on the second column 6 separated after the heart cut of the gas chromatograph. The collection device in the collection and release device 5 of the present embodiment cools high-purity nitrogen gas using liquid nitrogen as a cooling medium, and blows the cooled nitrogen gas onto the second column 6 and flows out after heart-cutting. The collected chemical components are collected. The collection time of the device can be set freely. At the same time, the two columns 4 and 6 after heart-cutting of the gas chromatograph are connected to the same mass spectrometer detector 9 using the valve flow path control device 7 and the second connection column 8.
(2) After that, in accordance with the request of the experiment, components that require cutting and further separation are guided to the second column 6, and at the same time, the collecting device of the collecting and discharging device 5 is activated to collect the chemical components that have flowed out. Gather. Other chemical components that do not require cutting pass through the first connection column 4 and directly enter the mass spectrometry detector 9, where they are analyzed and qualitatively determined.
(3) After the collection is completed, the chemical components in the first connection column 4 are analyzed in the mass spectrometric detector 9, and then the collection device of the collection / release device 5 is activated and heated by the electric heating module. Then, nitrogen gas, helium gas, or other gas is directly purged, and the collected chemical components are quickly released into the second column 6 for further separation. The separated chemical components enter the mass spectrometry detector 9 for qualitative determination.

(１)まず、ガスクロマトグラフのハートカット後に分離した第二カラム６上には捕集放出装置５を取付ける。本実施例の捕集放出装置５中の捕集装置は液体窒素を冷却媒体として用いて管路より導入し、液体窒素で第二カラムを包み込むか周囲を囲み、ハートカット後に流出した化学成分の冷却捕集を行う。該装置の捕集時間は自由に設定できる。同時に、バルブ流路制御装置７と第二連結カラム８を用いてガスクロマトグラフのハートカット後の二本のカラム４、６を同一台の質量分析検出器９上に連結する。
(２)その後、実験の要求に応じてカットを必要とし更なる分離を必要とする成分を第二カラム６に導き、同時に捕集放出装置５の捕集装置を起動させ流出した化学成分を捕集する。その他カット不要な化学成分は第一連結カラム４を通過して直接、質量分析検出器９に入り、分析され定性定量が行われる。
(３)捕集終了後、第一連結カラム４中の化学成分を質量分析検出器９中で分析した後、捕集放出装置５の捕集装置が起動し、電気加熱モジュールで加熱後の空気、窒素ガス、ヘリウムガス、或いはその他気体を直接用いてパージし、捕集した化学成分は迅速に第二カラム６中に放出されて更なる分離が行われる。分離後の化学成分は質量分析検出器９に入り定性定量が行われる。 (1) First, the collection / release device 5 is mounted on the second column 6 separated after the heart cut of the gas chromatograph. The collection device in the collection / release device 5 of this embodiment uses liquid nitrogen as a cooling medium and introduces it from a pipe line, encloses or surrounds the second column with liquid nitrogen, and contains chemical components that have flowed out after the heart cut. Cool and collect. The collection time of the device can be set freely. At the same time, the two columns 4 and 6 after heart-cutting of the gas chromatograph are connected to the same mass spectrometer detector 9 using the valve flow path control device 7 and the second connection column 8.
(2) After that, in accordance with the request of the experiment, components that require cutting and further separation are guided to the second column 6, and at the same time, the collecting device of the collecting and discharging device 5 is activated to collect the chemical components that have flowed out. Gather. Other chemical components that do not require cutting pass through the first connection column 4 and directly enter the mass spectrometry detector 9, where they are analyzed and qualitatively determined.
(3) After the collection is completed, the chemical components in the first connection column 4 are analyzed in the mass spectrometric detector 9, and then the collection device of the collection / release device 5 is activated and heated by the electric heating module. Then, nitrogen gas, helium gas, or other gas is directly purged and collected, and the collected chemical components are quickly released into the second column 6 for further separation. The separated chemical components enter the mass spectrometry detector 9 for qualitative determination.

(１)まず、ガスクロマトグラフのハートカット後に分離した第二カラム６上には捕集放出装置５を取付ける。本実施例の捕集放出装置５中の捕集装置は液体窒素を冷却媒体として用いて高純度窒素ガスを冷却し、さらに冷却後の窒素ガスをカラム上に吹き付けてハートカット後に流出した化学成分の捕集を行う。該装置の捕集時間は自由に設定できる。同時に、バルブ流路制御装置７と第二連結カラム８を用いてガスクロマトグラフのハートカット後の二本のカラム４、６を同一台の質量分析検出器９上に連結する。
(２)その後、実験の要求に応じてカットを必要とし更なる分離を必要とする成分を第二カラム６に導き、同時に捕集放出装置５の捕集装置を起動させ流出した化学成分を捕集する。その他、カット不要な化学成分は第一連結カラム４を通過して直接、質量分析検出器９に入り、分析され定性定量が行われる。
(３)捕集終了後、第一連結カラム４中の化学成分を質量分析検出器９中で分析した後、捕集放出装置５の捕集装置が起動され、電気加熱モジュールを直接用いて加熱され、捕集した化学成分は迅速に第二カラム６中に放出されて更なる分離が行われる。分離後の化学成分は質量分析検出器９に入り定性定量が行われる。 (1) First, the collection / release device 5 is mounted on the second column 6 separated after the heart cut of the gas chromatograph. The collection device in the collection / release device 5 of this embodiment uses liquid nitrogen as a cooling medium to cool high-purity nitrogen gas, and further sprays the cooled nitrogen gas onto the column to discharge chemical components that flow out after heart-cutting. To collect. The collection time of the device can be set freely. At the same time, the two columns 4 and 6 after heart-cutting of the gas chromatograph are connected to the same mass spectrometer detector 9 using the valve flow path control device 7 and the second connection column 8.
(2) After that, in accordance with the request of the experiment, components that require cutting and further separation are guided to the second column 6, and at the same time, the collecting device of the collecting and discharging device 5 is activated to collect the chemical components that have flowed out. Gather. In addition, chemical components that do not need to be cut pass through the first connection column 4 and directly enter the mass spectrometry detector 9, where they are analyzed and qualitatively determined.
(3) After the collection is completed, the chemical components in the first connection column 4 are analyzed in the mass spectrometric detector 9, and then the collection device of the collection / release device 5 is activated and heated directly using the electric heating module. The collected chemical components are quickly released into the second column 6 for further separation. The separated chemical components enter the mass spectrometry detector 9 for qualitative determination.

前述の三つは本考案の単なる具体的な実施例であり、本考案の設計構想はこれに制限されないものである。本構想を用いて本考案に対して行った非実質的な変化や修正は全て実用新案登録請求の範囲を侵害する行為とみなすことをここに明記する。   The above three are merely specific embodiments of the present invention, and the design concept of the present invention is not limited thereto. It is clearly stated here that any non-substantial changes or modifications made to the present invention using this concept are regarded as infringing the scope of the utility model registration request.

１ サンプル注入口
２ 第一カラム
３ ハートカット器
４ 第一連結カラム
１５ 第二カラム
６ 第二カラム
１６ 質量分析検出器
１７ 水素炎イオン検出器(FID)
５ 捕集放出装置
７ バルブ流路制御装置
８ 第二連結カラム
９ 質量分析検出器 DESCRIPTION OF SYMBOLS 1 Sample inlet 2 1st column 3 Heart-cut device 4 1st connection column 15 2nd column 6 2nd column 16 Mass spectrometry detector
17 Flame ion detector (FID)
5 Collection and Release Device 7 Valve Flow Control Device 8 Second Connection Column 9 Mass Spectrometry Detector

Claims (2)

ガスクロマトグラフのハートカット技術機能向上用の捕集放出装置において、
該装置は、サンプル注入口に連結するハートカット器と、ハートカット器に連結する質量分析検出器を含み、ハートカット器から分離される二本のカラムの内、一本のカラム上に捕集放出装置を設置することを特徴とするガスクロマトグラフのハートカット技術機能向上用の捕集放出装置。 In the collection and release device for improving the heart-cutting technology function of the gas chromatograph,
The apparatus includes a heart cut device connected to the sample inlet and a mass spectrometry detector connected to the heart cut device, and is collected on one of the two columns separated from the heart cut device. A collection and release device for improving the heart-cutting technology function of a gas chromatograph, characterized by installing a release device. 前記装置にはさらにバルブ流路制御装置を含み、該バルブ流路制御装置は連結カラムを介してハートカット器と質量分析検出器に連結され、前記捕集放出装置は、ハートカット器とバルブ流路制御装置に連結するカラム上に設置されることを特徴とする請求項１に記載のガスクロマトグラフのハートカット技術機能向上用の捕集放出装置。   The apparatus further includes a valve flow path control device, the valve flow path control apparatus is connected to a heart cut device and a mass spectrometry detector via a connection column, and the collection and discharge device includes the heart cut device and the valve flow control device. The collection / release device for improving the heart-cutting technology function of a gas chromatograph according to claim 1, wherein the collection / release device is installed on a column connected to a path control device.
JP2012004910U 2011-11-23 2012-08-10 Collection and release device for improving heart-cutting technology of gas chromatograph Expired - Lifetime JP3179280U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109738535A (en) * 2019-01-16 2019-05-10 广东省测试分析研究所（中国广州分析测试中心） A kind of multi-functional multidimensional gas chromatography system being switched fast

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109738535A (en) * 2019-01-16 2019-05-10 广东省测试分析研究所（中国广州分析测试中心） A kind of multi-functional multidimensional gas chromatography system being switched fast
CN109738535B (en) * 2019-01-16 2024-06-11 广东省测试分析研究所（中国广州分析测试中心） Multi-functional quick-switching multidimensional gas chromatography system

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