JP2000162199A - Detecting method of polybiphenyl chloride - Google Patents

Detecting method of polybiphenyl chloride

Info

Publication number
JP2000162199A
JP2000162199A JP10338630A JP33863098A JP2000162199A JP 2000162199 A JP2000162199 A JP 2000162199A JP 10338630 A JP10338630 A JP 10338630A JP 33863098 A JP33863098 A JP 33863098A JP 2000162199 A JP2000162199 A JP 2000162199A
Authority
JP
Japan
Prior art keywords
separation tube
sample
temperature
pcb
carrier gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP10338630A
Other languages
Japanese (ja)
Other versions
JP3071181B2 (en
Inventor
Toshiyoshi Toma
敏孔 戸澗
Toshio Nakajima
敏夫 中島
Mitsuhiko Shimura
光彦 志村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Power Technology Ltd
Tokyo Electric Power Company Holdings Inc
Original Assignee
Tokyo Electric Power Co Inc
Tokyo Electric Power Environmental Engineering Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokyo Electric Power Co Inc, Tokyo Electric Power Environmental Engineering Co Inc filed Critical Tokyo Electric Power Co Inc
Priority to JP10338630A priority Critical patent/JP3071181B2/en
Publication of JP2000162199A publication Critical patent/JP2000162199A/en
Application granted granted Critical
Publication of JP3071181B2 publication Critical patent/JP3071181B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Abstract

PROBLEM TO BE SOLVED: To perform a detection with sufficient precision by setting the temperature of a separation tube to a specified range when a sample containing polybiphenyl chloride (PCB) is passed in the separation tube. SOLUTION: This methods comprises a carrier gas supplying means 1, a detecting means (radiation source) 3 connected to the carrier gas supplying means 1, a separation tube (column) 4 having one end side connected to the carrier gas supplying means 1 through the detecting means 3, and a recorder 5 connected to the detecting means 3. Further, it comprises a sample injecting means 6, so that the sample injection means 6 supplies a sample containing PCB or a treated insulating oil to a sample injection port 7 provided on one end of the separation tube 4. A flowmeter 8 is connected to the other end of the separation tube 4 through the detecting means. When the sample containing PCG is passed through the separation tube 4 of a gas chromatographic device, the temperature of the separation tube 4 is set to 170-190 deg.C, particularly to 175-185 deg.C.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、例えば、ポリ塩素
化ビフェニルを含有する絶縁油などを処理した際に、こ
の処理済みの絶縁油中からポリ塩素化ビフェニル、特に
低塩素化ビフェニルを検出するための方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects polychlorinated biphenyls, particularly low-chlorinated biphenyls, from the treated insulating oil when, for example, insulating oil containing polychlorinated biphenyl is treated. For how to.

【0002】[0002]

【発明が解決しようとする課題】一般に、発電施設の変
圧器などに使用されている絶縁油には、絶縁性能を高め
るために、ポリ塩素化ビフェニル(以下、PCBとも言
う)が添加されていた。しかし、このPCBが有害であ
ることから、近年は、絶縁油がPCBを含有しないもの
に切り替えられている。その結果、PCBを含有する大
量の絶縁油を処理する必要が生じている。
Generally, polychlorinated biphenyl (hereinafter, also referred to as PCB) has been added to insulating oil used in transformers of power generation facilities in order to enhance insulation performance. . However, since this PCB is harmful, the insulating oil has recently been switched to one containing no PCB. As a result, a large amount of insulating oil containing PCB needs to be treated.

【0003】従来、PCBを含有する絶縁油の処理につ
いては、焼却処理のみが法律に規定されていたが、この
処理方法では、ダイオキシン等の有害な物質を発生させ
る場合もあり、処理が進んでいなかった。そこで、最近
では、環境への影響が少ない処理方法として化学的な処
理方法、特に脱塩素化処理方法が法律に盛り込まれ、P
CB処理の進展が期待されている。ここで、この脱塩素
化処理方法について、化学抽出分解法を例にとり、その
概要を簡単に説明する。
Conventionally, as for the treatment of insulating oil containing PCB, only incineration treatment has been prescribed by law. However, this treatment method may generate harmful substances such as dioxin, so that the treatment proceeds. did not exist. Therefore, recently, a chemical treatment method, particularly a dechlorination treatment method, has been incorporated into the law as a treatment method with little effect on the environment.
The progress of CB processing is expected. Here, the outline of the dechlorination treatment method will be briefly described by taking a chemical extraction decomposition method as an example.

【0004】化学抽出分解方法は、常圧下、200℃程
度で、PCBを含有する絶縁油と苛性ソーダ等のアルカ
リ剤とを、反応槽内でDMI(1,3−ジメチル−2−
イミダゾリジノン)などの非プロトン系極性溶媒の存在
下にて反応させる。そして、これによってPCBを脱塩
素・無害化、つまりビフェニルと塩とに分解することを
特徴とする。なお、DMIは蒸留によって、また、苛性
ソーダは濾過分離によって、それぞれ回収され、再使用
されることになる。
[0004] The chemical extraction and decomposition method is a method in which an insulating oil containing PCB and an alkaline agent such as caustic soda are mixed in a reaction vessel at about 200 ° C under normal pressure in a DMI (1,3-dimethyl-2-) solution.
The reaction is carried out in the presence of an aprotic polar solvent such as imidazolidinone. The PCB is dechlorinated and made harmless, that is, decomposed into biphenyl and a salt. DMI is recovered by distillation, and caustic soda is recovered by filtration and reused.

【0005】ところで、こうした脱塩素化処理方法を用
いて、PCBを含む絶縁油を処理するにあたっては、確
実にPCBが脱塩素・無害化されているか否かを確認す
ることが、言い換えれば処理済絶縁油中にPCBが基準
値以上、残留していないかどうかを調べるPCBの検出
作業が極めて重要になる。そして、このPCBの検出作
業は、検出結果を迅速、かつ、容易に得られるようにす
る必要があることから、絶縁油の処理施設内にて、汎用
装置であるガスクロマトグラフ装置を用いて実施するこ
とが望まれる。
By the way, in treating insulating oil containing PCB using such a dechlorination treatment method, it is necessary to surely confirm whether PCB is dechlorinated and made harmless. It is very important to detect the PCB in the insulating oil to check whether the PCB remains above the reference value. This PCB detection operation is performed using a general-purpose gas chromatograph in an insulating oil processing facility because it is necessary to obtain the detection result quickly and easily. It is desired.

【0006】ところが、この汎用のガスクロマトグラフ
装置を用いた検出方法には、次のような問題がある。す
なわち、上記のごとく脱塩素化処理を行った場合、PC
Bは低塩素化され、次第に一塩素化ビフェニルや二塩素
化ビフェニルの割合が増大していく。このため、もし脱
塩素化処理が不完全な場合には、必然的に、こうした低
塩素化ビフェニルが多く残る。それゆえ、低塩素化ビフ
ェニルについても高塩素化ビフェニルと同様、十分な精
度で検出できることが望まれる。
However, the detection method using this general-purpose gas chromatograph has the following problems. That is, when dechlorination treatment is performed as described above, PC
B is hypochlorinated, and the proportion of monochlorinated biphenyl and dichlorinated biphenyl gradually increases. For this reason, if the dechlorination treatment is incomplete, a large amount of such a low-chlorinated biphenyl remains inevitably. Therefore, it is desired that low chlorinated biphenyl can be detected with sufficient accuracy, similarly to high chlorinated biphenyl.

【0007】しかし、ガスクロマトグラフ装置を用いた
従来方法は、基本的に、塩素数が3以上の高塩素化ビフ
ェニルを検出対象とするため、低塩素化ビフェニルに関
しては、十分な精度の検出結果が得られなかった。つま
り、従来方法では、処理済絶縁油中に低塩素化ビフェニ
ルが基準値以上残っているか否かを正確に知ることがで
きなかった。
However, the conventional method using a gas chromatograph basically detects highly chlorinated biphenyls having a chlorine number of 3 or more, so that a sufficiently accurate detection result can be obtained for low chlorinated biphenyls. Could not be obtained. That is, in the conventional method, it was not possible to accurately know whether or not the low-chlorinated biphenyl remained in the treated insulating oil at or above the reference value.

【0008】したがって、本発明が解決しようとする課
題は、ガスクロマトグラフ装置を用いて、ポリ塩素化ビ
フェニル、特に、一塩素化ビフェニルや二塩素化ビフェ
ニルを十分な精度で検出できるポリ塩素化ビフェニルの
検出方法を提供することである。
Accordingly, an object of the present invention is to provide a polychromated biphenyl, particularly a polychlorinated biphenyl capable of detecting monochlorinated biphenyl and dichlorinated biphenyl with sufficient accuracy by using a gas chromatograph. It is to provide a detection method.

【0009】[0009]

【課題を解決するための手段】本発明者は、上記課題を
解決するため鋭意研究を推し進め、その過程で、ガスク
ロマトグラフ装置を用いて処理済絶縁油からPCBを検
出する際、何らかの条件を変更してやれば、低塩素化ビ
フェニルについても高塩素化ビフェニルのように十分な
精度で検出できるのではないかと考えた。そして、従来
方法が低塩素化ビフェニルに対応できないのは、そのク
ロマトグラム上でのピークを、溶媒ピークから分離させ
るのが困難であることに起因することを突き止めた。よ
って、検出の際の条件を変更して、クロマトグラム上で
の両者のピークを分離させることができれば、低塩素化
ビフェニルについても高塩素化ビフェニルと同様、十分
な精度で検出できるであろうとの結論に到達した。
Means for Solving the Problems The inventor of the present invention has intensively studied to solve the above-mentioned problems, and in the course of this, changed some conditions when detecting PCB from the treated insulating oil using a gas chromatograph. Then, it was thought that low-chlorinated biphenyl could be detected with sufficient accuracy as high-chlorinated biphenyl. It has been found that the conventional method cannot cope with the low chlorinated biphenyl because it is difficult to separate the peak on the chromatogram from the solvent peak. Therefore, if the conditions at the time of detection were changed and both peaks on the chromatogram could be separated, low chlorinated biphenyl could be detected with sufficient accuracy as well as high chlorinated biphenyl. The conclusion has been reached.

【0010】本発明者は、こうした技術思想に基づいて
更に研究を推し進め、その結果、分離管(充填剤が詰め
込まれ、内部を試料がキャリアガスと共に通過する管)
の温度を180℃前後に保って検出作業を行えばよいこ
とを見出した。すなわち、通常、ガスクロマトグラフ装
置によるPCBの検出作業は、分離管の温度を210〜
220℃に保って実施される。これに対して、分離管の
温度をそれよりも低下させ、180℃前後、詳しくは1
70〜190℃の範囲にて検出作業を行えば、十分な精
度で、かつ、迅速さを失わずに、低塩素化ビフェニルが
存在しているか否かを確かめることが可能になる。ちな
みに、これは、分離管の温度が上記温度範囲の上限値よ
りも高い場合、クロマトグラム上で、低塩素化ビフェニ
ルのピークと溶媒ピークとの分離が不明確になり、逆
に、分離管の温度が上記温度範囲の下限値よりも低い場
合、分離管中の残留物追い出しに多大な時間が掛かっ
て、迅速さが失われるからである。
The present inventor has further researched based on such a technical idea, and as a result, a separation tube (a tube in which a filler is packed and a sample passes through together with a carrier gas).
It was found that the detection operation should be performed while maintaining the temperature of about 180 ° C. That is, usually, the detection operation of the PCB by the gas chromatograph device is performed by setting the temperature of the separation tube to 210 to
It is carried out at 220 ° C. On the other hand, the temperature of the separation tube is lowered to about 180 ° C.,
If the detection operation is performed in the range of 70 to 190 ° C., it becomes possible to confirm whether or not low-chlorinated biphenyl is present with sufficient accuracy and without losing speed. By the way, if the temperature of the separation tube is higher than the upper limit of the above temperature range, the separation of the low chlorinated biphenyl peak from the solvent peak on the chromatogram becomes unclear, and conversely, the separation tube If the temperature is lower than the lower limit of the above temperature range, it takes a long time to drive out the residue in the separation tube, and the speed is lost.

【0011】本発明は、こうした知見に基づいてなされ
たものであり、上記の課題は、試料を注入手段によっ
て、キャリアガスと共に、充填剤が充填された分離管内
に注入し、前記分離管内を通過させて、前記分離管に接
続された検出手段により試料に含まれる成分を検出する
よう構成されたガスクロマトグラフ装置を用いた、ポリ
塩素化ビフェニルの検出方法であって、ポリ塩素化ビフ
ェニルを含む試料を、前記ガスクロマトグラフ装置の分
離管内を通過させる際、前記分離管の温度を、170〜
190℃とすることを特徴とするポリ塩素化ビフェニル
の検出方法によって解決される。
The present invention has been made based on such knowledge, and the above-mentioned problem is solved by injecting a sample together with a carrier gas into a separation tube filled with a filler by an injection means, and passing the sample through the separation tube. A method for detecting polychlorinated biphenyl, using a gas chromatograph apparatus configured to detect a component contained in the sample by a detection means connected to the separation tube, wherein the sample containing polychlorinated biphenyl is When passing through the separation tube of the gas chromatograph device, the temperature of the separation tube, 170 ~
The problem is solved by a method for detecting polychlorinated biphenyl, which is characterized by being at 190 ° C.

【0012】なお、ポリ塩素化ビフェニルを含む試料を
通過させる際の分離管の温度は、175〜185℃であ
ることが特に好ましい。また、一層良好な検出結果を得
るため、分離管として、内径が1〜4mmで管長が1〜
5mのものを、充填剤として、OV−1又はOV−17
を、キャリアガスとして、窒素ガス又はヘリウムガスを
用い、前記分離管の一端に設けた、ポリ塩素化ビフェニ
ルを含む試料を前記分離管内に注入する試料注入口部の
温度を250〜350℃とし、更に検出手段の温度を2
50〜350℃とすることが好ましい。
The temperature of the separation tube when passing a sample containing polychlorinated biphenyl is particularly preferably from 175 to 185 ° C. In order to obtain better detection results, the separation tube has an inner diameter of 1 to 4 mm and a length of 1 to 4 mm.
5 m, as a filler, OV-1 or OV-17
Using a nitrogen gas or a helium gas as a carrier gas, the temperature of a sample injection port portion for injecting a sample containing polychlorinated biphenyl provided at one end of the separation tube into the separation tube is set to 250 to 350 ° C. Further, the temperature of the detecting means is set to 2
The temperature is preferably set to 50 to 350 ° C.

【0013】また、これと同様の理由から、試料を充填
剤が充填された分離管内に注入するに先立ち、試料に、
濃度が5〜10%の発煙硫酸を加え、この試料と発煙硫
酸とからなる混合物を0.5〜2分にわたって振とうす
ることが好ましい。ポリ塩素化ビフェニルを含む試料に
対して、前処理をこうした方法で行うことにより、この
前処理に要する時間が従来方法に比べて大幅に短縮され
る。
For the same reason, prior to injecting the sample into the separation tube filled with the filler, the sample is
Preferably, fuming sulfuric acid having a concentration of 5 to 10% is added, and the mixture of this sample and fuming sulfuric acid is shaken for 0.5 to 2 minutes. By performing the pretreatment on a sample containing polychlorinated biphenyl in this manner, the time required for the pretreatment is significantly reduced as compared with the conventional method.

【0014】[0014]

【発明の実施の形態】以下で、本発明の一実施形態とし
て説明するポリ塩素化ビフェニル(以降、PCBとも言
う)の検出方法は、試料である処理済絶縁油を注入手段
によって、キャリアガスと共に、充填剤が充填された分
離管内に注入し、この分離管内を通過させて、それに接
続された検出手段により試料に含まれる成分を検出する
よう構成されたガスクロマトグラフ装置を用いたもので
あり、PCBを含む試料を、ガスクロマトグラフ装置の
分離管内を通過させる際、この分離管の温度を、170
〜190℃、特に175〜185℃にすることを特徴と
する。そして、本実施形態では、分離管として内径が1
〜4mm、管長が1〜5mのガラス製のものを、充填剤
としてOV−1又はOV−17を、キャリアガスとして
窒素ガスを用い、分離管の一端に設けた、PCBを含む
試料を分離管内に注入する試料注入口部の温度を250
〜350℃とし、更に検出手段の温度を250〜350
℃とする。更に本実施形態では、試料を充填剤が充填さ
れた分離管内に注入するに先立ち、この試料に、濃度が
5〜10%の発煙硫酸を加え、試料と発煙硫酸とからな
る混合物を0.5〜2分にわたって振とうするようにし
ている。
BEST MODE FOR CARRYING OUT THE INVENTION A method for detecting polychlorinated biphenyl (hereinafter, also referred to as PCB) described as an embodiment of the present invention is described below. Using a gas chromatograph apparatus configured to inject into a separation tube filled with a filler, pass through the separation tube, and detect components contained in the sample by detection means connected thereto, When a sample containing PCB is passed through a separation tube of a gas chromatograph, the temperature of the separation tube is set to 170 ° C.
To 190 ° C, especially 175 to 185 ° C. In the present embodiment, the inner diameter of the separation tube is 1
A sample made of glass having a length of 1 to 5 mm, a tube length of 1 to 5 m, OV-1 or OV-17 as a filler, nitrogen gas as a carrier gas, and a PCB-containing sample provided at one end of the separation tube. The temperature of the sample injection port to be injected into the
To 350 ° C. and the temperature of the detecting means is set to 250 to 350 ° C.
° C. Further, in this embodiment, before injecting the sample into the separation tube filled with the filler, fuming sulfuric acid having a concentration of 5 to 10% is added to the sample, and a mixture of the sample and the fuming sulfuric acid is added to the sample at 0.5%. Shake for ~ 2 minutes.

【0015】続いて、図1を用い、本発明の実施形態を
更に詳しく説明する。なお、図1はPCBの検出に用い
られるガスクロマトグラフ装置の概略構造図である。本
発明の実施形態に係るPCBの検出方法を説明するに際
し、先ず、それに使用されるガスクロマトグラフ装置の
構造について述べる。図1から判るように、ここで使用
されるガスクロマトグラフ装置は、概して、キャリアガ
ス供給手段1と、流量調節弁2を介して、このキャリア
ガス供給手段1に接続された検出手段(放射線源)3
と、この検出手段3を介して、一端側がキャリアガス供
給手段1に接続された分離管(カラム)4と、検出手段
3に接続された記録計5とを具備してなる。更に、上記
ガスクロマトグラフ装置は試料注入手段6を備え、この
試料注入手段6が、分離管4の一端に設けた試料注入口
部7に、PCBを含む試料すなわち処理済絶縁油を供給
するようになっている。また、分離管4の他端には、検
出手段3を介して流量計8が接続されている。
Next, an embodiment of the present invention will be described in more detail with reference to FIG. FIG. 1 is a schematic structural view of a gas chromatograph used for detecting a PCB. In describing the PCB detection method according to the embodiment of the present invention, first, the structure of a gas chromatograph used for the method will be described. As can be seen from FIG. 1, the gas chromatograph used here generally comprises a carrier gas supply means 1 and a detection means (radiation source) connected to the carrier gas supply means 1 via a flow control valve 2. 3
And a separation tube (column) 4 having one end connected to the carrier gas supply means 1 via the detection means 3, and a recorder 5 connected to the detection means 3. Further, the gas chromatograph apparatus has a sample injection means 6 which supplies a sample including PCB, that is, a processed insulating oil to a sample injection port 7 provided at one end of the separation tube 4. Has become. Further, a flow meter 8 is connected to the other end of the separation tube 4 via the detection means 3.

【0016】これら構成要素のうちキャリアガス供給手
段1は、キャリアガス(ここでは窒素ガス)が高圧充填
されたボンベを主体としたものであり、流量調節弁2と
共同で、分離管4にキャリアガスを一定量ずつ供給でき
るようになっている。つまりキャリアガス供給手段1か
ら試料注入口部7に送り込まれたキャリアガスは、試料
注入手段6からのPCBを含む試料と共に、分離管4に
注入される。なお、特に図示してはいないが、試料注入
口部7には加熱手段が設けられており、この加熱手段の
作用によって、試料注入口部7が所定温度(250〜3
50℃)に維持されるよう構成している。
Among these components, the carrier gas supply means 1 is mainly composed of a cylinder filled with a carrier gas (here, nitrogen gas) at a high pressure. The gas can be supplied at a constant rate. That is, the carrier gas sent from the carrier gas supply unit 1 to the sample injection port 7 is injected into the separation tube 4 together with the sample containing PCB from the sample injection unit 6. Although not particularly shown, a heating means is provided in the sample injection port 7, and by the action of the heating means, the sample injection port 7 is heated to a predetermined temperature (250 to 3).
(50 ° C.).

【0017】分離管4に接続された検出手段3につい
て、その構造や機能は既に公知であるため、ここでは詳
しく説明しないが、63Ni370MBqを金板(厚さ
0.1mm)の片面にメッキしたものを、このメッキ面
が内側となるよう、円筒状に加工し、それをステンレス
スチール製(厚さ1mm)の線源ホルダー内に収容して
なる構造を有する。こうした構造の検出手段3では、放
射線源を通過するキャリアガスは、63Ni線源から放出
されるβ線によってイオン化され、これによってイオン
電流が流れる。ところが、ここに、ハロゲン化合物等の
親電子性化合物が流入すると、イオン電流は減少する。
このイオン電流の変化に関するデータは、直ちに記録計
5に送られ、それに基づいてクロマトグラムが作成され
る。なお、作業中、検出手段3、特にその放射線源は、
ある温度(250〜350℃)に保たれるようになって
いる。
[0017] The detection means 3 connected to the separation tube 4, since the structure and function are already known, will not be described here in greater detail, plated with 63 Ni370MBq on one side of the gold sheet (thickness 0.1 mm) The plate is formed into a cylindrical shape such that the plating surface is on the inside, and is housed in a stainless steel (1 mm thick) source holder. In the detection means 3 having such a structure, the carrier gas passing through the radiation source is ionized by β rays emitted from the 63 Ni radiation source, whereby an ion current flows. However, when an electrophilic compound such as a halogen compound flows therein, the ionic current decreases.
The data on the change in the ion current is immediately sent to the recorder 5, and a chromatogram is created based on the data. During the operation, the detecting means 3, especially its radiation source,
It is kept at a certain temperature (250-350 ° C.).

【0018】分離管4は、内径が1.8〜3mm、管長
が2〜3mのものであって、本実施形態では、それをガ
ラス材料から構成している。図では、分離管4の形状を
U字状としているが、直状であっても、あるいはコイル
状であってもよい。分離管4の内部には、OV−1又は
OV−17が、更に詳しく言えば、ガスクロマトグラフ
装置用の充填剤であるクロモゾルブWを、OV−1又は
OV−17(JIS K 0093)で被覆したものが
均一に充填されている。更に、分離管4は、専用の加熱
手段(図示せず)を備えており、これによって分離管4
全体を所定温度(175〜185℃)に維持できるよう
構成している。なお、この分離管用加熱手段としては、
分離管4全体を収納し、周囲から加熱するオーブン型の
ものが一般的である。
The separation tube 4 has an inner diameter of 1.8 to 3 mm and a length of 2 to 3 m. In the present embodiment, the separation tube 4 is made of a glass material. In the figure, the shape of the separation tube 4 is U-shaped, but it may be straight or coiled. The inside of the separation tube 4 was coated with OV-1 or OV-17, more specifically, with Chromosolve W, which is a filler for a gas chromatograph, with OV-1 or OV-17 (JIS K 0093). Things are evenly filled. Further, the separation tube 4 is provided with a dedicated heating means (not shown).
The whole is configured to be maintained at a predetermined temperature (175 to 185 ° C.). In addition, as a heating means for this separation tube,
An oven type in which the entire separation tube 4 is housed and heated from the surroundings is generally used.

【0019】続いて、上記ガスクロマトグラフ装置を用
いたPCBの検出方法(以下、本検出方法と言う)につ
いて説明する。本検出方法の実施に際しては、まず、キ
ャリアガスを175〜185℃、特に180℃に保たれ
た分離管4に一定量ずつ供給する。また、これと同時
に、試料注入手段6を作動させ、PCBを含む試料を、
300〜340℃に保たれた試料注入口部7から分離管
4に供給する。なお、分離管4への供給に先立ち、試料
には発煙硫酸を用いて前処理(油分等の除去処理)を施
しておく必要がある。ここでは、発煙硫酸として濃度が
5〜10%、特に7.5%のものを用い、また、発煙硫
酸を加えた後の試料の振とう時間を0.5〜2分、特に
1分としている。更に、油分等の除去が完了した後は、
水酸化カリウムによって試料を中和処理しておく。
Next, a method for detecting a PCB using the gas chromatograph (hereinafter referred to as the present detection method) will be described. In carrying out the present detection method, first, a predetermined amount of a carrier gas is supplied to the separation tube 4 maintained at 175 to 185 ° C, particularly 180 ° C. At the same time, the sample injecting means 6 is operated, and the sample containing PCB is
The sample is supplied to the separation tube 4 from the sample inlet 7 kept at 300 to 340 ° C. Prior to the supply to the separation tube 4, the sample needs to be subjected to a pretreatment (removal of oil and the like) using fuming sulfuric acid. Here, fuming sulfuric acid having a concentration of 5 to 10%, particularly 7.5% is used, and the shaking time of the sample after adding fuming sulfuric acid is 0.5 to 2 minutes, particularly 1 minute. . Furthermore, after the removal of oil etc. is completed,
The sample is neutralized with potassium hydroxide.

【0020】さて、上記のごとく分離管4に、キャリア
ガスと共に試料を供給すると、それに含まれる検出対象
成分、すなわち様々な塩素数のPCBは、分離管4を通
過する間に互いに分離する。そして、分離管4に続いて
設けられ、300〜340℃に保たれた検出手段3によ
ってPCBの種別が検出され、更にそのデータに基づい
てクロマトグラムが作成されることになる。
When the sample is supplied together with the carrier gas to the separation tube 4 as described above, the detection target components contained therein, ie, the PCBs having various chlorine numbers are separated from each other while passing through the separation tube 4. Then, the type of the PCB is detected by the detecting means 3 which is provided following the separation tube 4 and is kept at 300 to 340 ° C., and a chromatogram is created based on the data.

【0021】ところで、本検出方法では、上述したよう
に分離管4の温度を、175〜185℃、特に180℃
としている。したがって、検出結果として得られるクロ
マトグラム上で、低塩素化ビフェニルのピークと溶媒ピ
ークとの分離が不明確になることも、あるいは、分離管
4の中の残留物追い出しに多大な時間が掛かって、迅速
さが失われることもない。つまり、十分な精度で、か
つ、迅速さを失わずに、試料である処理済絶縁油中の低
塩素化ビフェニルを検出することができる。言い換えれ
ば、本検出方法を用いることで、クロマトグラムから低
塩素化ビフェニルの定量下限値を正確に算出することが
可能となる。ゆえに、それが実際に処理基準値(例えば
0.5μg/g)を下回っているか否か(処理済絶縁油
が無害化されたか否か)を容易に判別できる。
In the present detection method, as described above, the temperature of the separation tube 4 is set to 175 to 185 ° C.
And Therefore, on the chromatogram obtained as a detection result, the separation between the peak of the low chlorinated biphenyl and the solvent peak may become unclear, or the removal of the residue in the separation tube 4 may take a long time. No loss of speed. That is, low-chlorinated biphenyl in the treated insulating oil sample can be detected with sufficient accuracy and without loss of speed. In other words, by using this detection method, the lower limit of quantification of low-chlorinated biphenyl can be accurately calculated from the chromatogram. Therefore, it can be easily determined whether or not it actually falls below the treatment reference value (for example, 0.5 μg / g) (whether or not the treated insulating oil has been rendered harmless).

【0022】[0022]

【実施例】以下の条件にてPCB、特に低塩素化ビフェ
ニルの検出試験を行った。その結果(クロマトグラム)
を図2に示す。また、比較のために、従来方法で、すな
わち分離管の温度を215℃に保って低塩素化ビフェニ
ルの検出試験を行った。その結果(クロマトグラム)に
ついては図3に示す。
EXAMPLES Under the following conditions, detection tests for PCBs, especially low-chlorinated biphenyls, were carried out. The result (chromatogram)
Is shown in FIG. For comparison, a detection test of low-chlorinated biphenyl was conducted by a conventional method, that is, while keeping the temperature of the separation tube at 215 ° C. The result (chromatogram) is shown in FIG.

【0023】〔条件〕 分離管の温度:180℃ 分離管の内径:3mm 分離管の管長:2m 充填剤:クロモゾルブW(80〜100メッシュ) O
V−17(2%)で被覆 キャリアガス:窒素ガス(純度99.9999%) キャリアガスの供給量:50ml/min 試料注入口部の温度:300℃ 検出手段の温度:300℃ 前処理用発煙硫酸の濃度:7.5% 振とう時間:1分
[Conditions] Separation tube temperature: 180 ° C. Separation tube inner diameter: 3 mm Separation tube length: 2 m Filler: Chromosolve W (80-100 mesh) O
Coated with V-17 (2%) Carrier gas: Nitrogen gas (purity 99.9999%) Carrier gas supply amount: 50 ml / min Sample injection port temperature: 300 ° C. Detecting means temperature: 300 ° C. Pretreatment smoke Sulfuric acid concentration: 7.5% Shaking time: 1 minute

【0024】[0024]

【特性】図2から判るように、本実施形態の検出方法を
用いた場合には、低塩素化ビフェニルである一塩素化ビ
フェニルのピーク(図2中、A,Bで示す)や二塩素化
ビフェニルのピーク(図2中、C,D,Eで示す)が、
相互にも、また、溶媒ピーク(図2中、Fで示す)から
も明瞭に分離して現れている。よって、この図2に示す
クロマトグラムから、低塩素化ビフェニルの定量下限値
を正確に算出することができる。ちなみに、ピークAは
2−クロロビフェニルを、ピークBは4−クロロビフェ
ニルを、ピークCは2,6−ジクロロビフェニルを、ピ
ークDは2,4’−ジクロロビフェニルを、そしてピー
クEは4,4’−ジクロロビフェニルに対応している。
[Characteristics] As can be seen from FIG. 2, when the detection method of this embodiment is used, the peaks (shown by A and B in FIG. 2) of dichlorinated biphenyl, which is a low-chlorinated biphenyl, and dichlorination Biphenyl peaks (indicated by C, D, and E in FIG. 2)
They are clearly separated from each other and from the solvent peak (indicated by F in FIG. 2). Therefore, the lower limit of quantification of low-chlorinated biphenyl can be accurately calculated from the chromatogram shown in FIG. Incidentally, peak A is 2-chlorobiphenyl, peak B is 4-chlorobiphenyl, peak C is 2,6-dichlorobiphenyl, peak D is 2,4'-dichlorobiphenyl, and peak E is 4,4. '-Dichlorobiphenyl.

【0025】これに対して、従来の検出方法を用いた場
合には、一塩素化ビフェニルのピークA,Bや二塩素化
ビフェニルのピークC,D,Eが、相互にも、また、溶
媒ピークFからも明瞭に分離して現れず、したがって、
この図3のクロマトグラムからは、低塩素化ビフェニル
の定量下限値を正確に算出することはできない。
On the other hand, when the conventional detection method is used, the peaks A and B of the monochlorinated biphenyl and the peaks C, D and E of the dichlorinated biphenyl are mutually and the solvent peak. Does not appear to be clearly separated from F,
The lower limit of quantification of the low-chlorinated biphenyl cannot be accurately calculated from the chromatogram in FIG.

【0026】[0026]

【発明の効果】本発明によれば、ガスクロマトグラフ装
置を用いて、ポリ塩素化ビフェニル、特に、一塩素化ビ
フェニルや二塩素化ビフェニルを十分な精度で、しかも
迅速に検出することができる。
According to the present invention, polychlorinated biphenyls, particularly monochlorinated biphenyls and dichlorinated biphenyls, can be detected with sufficient accuracy and quickly using a gas chromatograph.

【図面の簡単な説明】[Brief description of the drawings]

【図1】PCBの検出に用いられるガスクロマトグラフ
装置の概略構造図
FIG. 1 is a schematic structural view of a gas chromatograph used for detecting a PCB.

【図2】本実施形態の検出方法によって得た、処理済絶
縁油のクロマトグラム
FIG. 2 is a chromatogram of a treated insulating oil obtained by the detection method of the present embodiment.

【図3】従来の検出方法によって得た、処理済絶縁油の
クロマトグラム
FIG. 3 is a chromatogram of a treated insulating oil obtained by a conventional detection method.

【符号の説明】[Explanation of symbols]

1 キャリアガス供給手段 2 流量調節弁 3 検出手段(放射線源) 4 分離管(カラム) 5 記録計 6 試料注入手段 7 試料注入口部 8 流量計 DESCRIPTION OF SYMBOLS 1 Carrier gas supply means 2 Flow control valve 3 Detection means (radiation source) 4 Separation tube (column) 5 Recorder 6 Sample injection means 7 Sample injection port 8 Flow meter

フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) G01N 30/48 G01N 30/48 P 30/64 30/64 F 30/88 30/88 C (72)発明者 中島 敏夫 千葉県千葉市緑区大野台2−3−6 東電 環境エンジニアリング株式会社環境技術セ ンター内 (72)発明者 志村 光彦 千葉県千葉市緑区大野台2−3−6 東電 環境エンジニアリング株式会社環境技術セ ンター内Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat II (reference) G01N 30/48 G01N 30/48 P 30/64 30/64 F 30/88 30/88 C (72) Inventor Toshio Nakajima 2-3-6 Onodai, Midori-ku, Chiba-shi, Chiba Environmental Engineering Center, Tokyo Electric Power Engineering Co., Ltd. (72) Inventor Mitsuhiko Shimura 2-3-6 Onodai, Midori-ku, Midori-ku, Chiba City, Chiba Environmental Engineering Co., Ltd. Inside

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 試料を注入手段によって、キャリアガス
と共に、充填剤が充填された分離管内に注入し、前記分
離管内を通過させて、前記分離管に接続された検出手段
により試料に含まれる成分を検出するよう構成されたガ
スクロマトグラフ装置を用いた、ポリ塩素化ビフェニル
の検出方法であって、 ポリ塩素化ビフェニルを含む試料を、前記ガスクロマト
グラフ装置の分離管内を通過させる際、前記分離管の温
度を、170〜190℃とすることを特徴とするポリ塩
素化ビフェニルの検出方法。
1. A sample is injected by an injection means together with a carrier gas into a separation tube filled with a filler, passed through the separation tube, and contained in a sample by a detection means connected to the separation tube. A method for detecting polychlorinated biphenyl, using a gas chromatograph device configured to detect the sample, wherein a sample containing polychlorinated biphenyl is passed through a separation tube of the gas chromatograph device. A method for detecting polychlorinated biphenyl, wherein the temperature is 170 to 190 ° C.
【請求項2】 分離管として、内径が1〜4mm、管長
が1〜5mのものを用い、 充填剤として、OV−1又はOV−17を用い、 キャリアガスとして、窒素ガス又はヘリウムガスを用
い、 前記分離管の一端に設けた、ポリ塩素化ビフェニルを含
む試料を前記分離管内に注入する試料注入口部の温度を
250〜350℃とし、 検出手段の温度を250〜350℃とすることを特徴と
する請求項1に記載のポリ塩素化ビフェニルの検出方
法。
2. A separation tube having an inner diameter of 1 to 4 mm and a tube length of 1 to 5 m is used. OV-1 or OV-17 is used as a filler. Nitrogen gas or helium gas is used as a carrier gas. The temperature of a sample injection port for injecting a sample containing polychlorinated biphenyl provided at one end of the separation tube into the separation tube is set to 250 to 350 ° C., and the temperature of the detection means is set to 250 to 350 ° C. The method for detecting polychlorinated biphenyl according to claim 1, wherein:
【請求項3】 試料を充填剤が充填された分離管内に注
入するに先立ち、試料に、濃度が5〜10%の発煙硫酸
を加え、この試料と発煙硫酸とからなる混合物を0.5
〜2分にわたって振とうすることを特徴とする請求項1
又は請求項2に記載のポリ塩素化ビフェニルの検出方
法。
3. Prior to injecting a sample into a separation tube filled with a filler, fuming sulfuric acid having a concentration of 5 to 10% is added to the sample, and a mixture of the sample and fuming sulfuric acid is added to the sample.
2. Shaking for up to 2 minutes.
Or the method for detecting polychlorinated biphenyl according to claim 2.
JP10338630A 1998-11-30 1998-11-30 Method for detecting polychlorinated biphenyl Expired - Fee Related JP3071181B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10338630A JP3071181B2 (en) 1998-11-30 1998-11-30 Method for detecting polychlorinated biphenyl

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10338630A JP3071181B2 (en) 1998-11-30 1998-11-30 Method for detecting polychlorinated biphenyl

Publications (2)

Publication Number Publication Date
JP2000162199A true JP2000162199A (en) 2000-06-16
JP3071181B2 JP3071181B2 (en) 2000-07-31

Family

ID=18319994

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Country Status (1)

Country Link
JP (1) JP3071181B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006242803A (en) * 2005-03-04 2006-09-14 Sumika Chemical Analysis Service Ltd Method for quantitating polychlorobiphenyl

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006242803A (en) * 2005-03-04 2006-09-14 Sumika Chemical Analysis Service Ltd Method for quantitating polychlorobiphenyl
JP4632813B2 (en) * 2005-03-04 2011-02-16 株式会社住化分析センター Determination of polychlorinated biphenyls

Also Published As

Publication number Publication date
JP3071181B2 (en) 2000-07-31

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