JP2003222590A - Method for confirming presence of 5,5-dibromo-4,4-dichloro- indigo - Google Patents

Method for confirming presence of 5,5-dibromo-4,4-dichloro- indigo

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Publication number
JP2003222590A
JP2003222590A JP2002020761A JP2002020761A JP2003222590A JP 2003222590 A JP2003222590 A JP 2003222590A JP 2002020761 A JP2002020761 A JP 2002020761A JP 2002020761 A JP2002020761 A JP 2002020761A JP 2003222590 A JP2003222590 A JP 2003222590A
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JP
Japan
Prior art keywords
dibromo
water
dichloroindigo
test
under test
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
JP2002020761A
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Japanese (ja)
Other versions
JP3922034B2 (en
Inventor
Akira Wakasa
暁 若狭
Kazuhiro Tateno
一博 舘野
Yoshihiro Sagawa
良浩 寒川
Masataka Takai
政貴 高井
Hiroshi Nakaoka
洋志 中岡
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.)
Miura Co Ltd
Miura Institute of Research and Development Co Ltd
Original Assignee
Miura Co Ltd
Miura Institute of Research and Development Co Ltd
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Priority to JP2002020761A priority Critical patent/JP3922034B2/en
Publication of JP2003222590A publication Critical patent/JP2003222590A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To confirm the presence of 5,5-dibromo-4,4-dichloro-indigo in a specimen water by a method not dependent on the naked eye. <P>SOLUTION: A decision is made if the transmittance of red rays through a specimen water is beyond a prescribed reference level. It is concluded that there exists 5,5-dibromo-4,4-dichloro-indigo in the specimen water when the transmittance of red rays is beyond the prescribed reference level. <P>COPYRIGHT: (C)2003,JPO

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、5,5−ジブロモ
−4,4−ジクロロインジゴの存否確認方法、特に、被
試験水中に5,5−ジブロモ−4,4−ジクロロインジ
ゴが存在するか否かを確認するための存否確認方法に関
する。
TECHNICAL FIELD The present invention relates to a method for confirming the presence or absence of 5,5-dibromo-4,4-dichloroindigo, and in particular, whether 5,5-dibromo-4,4-dichloroindigo is present in water under test. The present invention relates to a presence confirmation method for confirming whether or not there is.

【0002】[0002]

【従来の技術とその課題】飲料水や食品の衛生管理にお
いては、大腸菌群の存否の検査が必要不可欠となってい
る。ここで、「大腸菌群」とは、好気性または通性嫌気
性のグラム陰性無芽胞の桿菌であり、乳糖を分解して酸
とガスとを生じるか、β−ガラクトシダーゼをもつ細菌
群をいい(例えば、社団法人日本水道協会発行、「上水
試験方法2001 解説」845頁参照)、「大腸菌」
そのものとは異なる概念である。因みに、飲料水中に大
腸菌群が含まれている場合、当該飲料水は、単に汚物で
汚染されているということだけではなく、病原菌類も含
んでいる可能性があることを示唆することになるため、
水道法上の水質基準では飲用に不適なものと判定される
ことになる。
2. Description of the Related Art In sanitary control of drinking water and food, it is essential to inspect the presence or absence of coliform bacteria. Here, "Escherichia coli group" is an aerobic or facultative anaerobic gram-negative sporeless bacillus, which decomposes lactose to produce acid and gas, or refers to a bacterial group having β-galactosidase ( For example, “Water Supply Test Method 2001 Explanation” page 845 issued by Japan Water Works Association), “E. coli”
It is a concept different from itself. By the way, if the drinking water contains coliform bacteria, it means that the drinking water may contain pathogenic fungi as well as being simply contaminated with waste. ,
According to the water quality standards under the Water Supply Act, it will be judged as unsuitable for drinking.

【0003】ところで、大腸菌群の指標となる性状は乳
糖発酵性であり、それに関与する酵素はβ−ガラクトシ
ダーゼ(β−galactosidase)である。したがって、飲
料水等の被試験水を細菌の培養環境に設定し、そこから
β−ガラクトシダーゼを検出することができると、間接
的に大腸菌群の存在を証明することができる。そこで、
このような大腸菌群の性状を利用した、飲料水等の被試
験水中における大腸菌群の存否を迅速に判定するための
方法として、合成酵素基質培地法が知られている。合成
酵素基質培地法は、発色物質または発光物質を結合させ
た酵素基質を培地に使用し、目的とする細菌がもつ特異
酵素により当該酵素基質が加水分解されて発色または発
光することを利用した検査方法(判定方法)であり、大
腸菌群の検出用の合成酵素基質培地法として、被試験水
の変色の有無により大腸菌群の存否を判定するXGal
−MUG法が知られている。
By the way, the property which is an index of coliform bacteria is lactose fermentability, and the enzyme involved in it is β-galactosidase. Therefore, if the test water such as drinking water is set in a bacterial culture environment and β-galactosidase can be detected from the culture environment, the presence of coliforms can be indirectly proved. Therefore,
A synthetic enzyme substrate medium method is known as a method for rapidly determining the presence or absence of coliform bacteria in test water such as drinking water, which utilizes such properties of coliform bacteria. The synthetic enzyme substrate medium method uses an enzyme substrate to which a chromogenic substance or a luminescent substance is bound in the medium, and a test utilizing the fact that the enzyme substrate is hydrolyzed to produce color or luminescence by a specific enzyme possessed by the target bacterium. As a synthesizing enzyme substrate medium method for detecting coliform bacteria, the presence or absence of coliform bacteria is determined by the presence or absence of discoloration of the water under test.
-The MUG method is known.

【0004】XGal−MUG法では、発色合成酵素基
質である5−ブロモ−4−クロロ―3−インドリル−β
−D−ガラクトピラノシド(通称X−Gal)、大腸菌
群の栄養素となるペプトン等およびピルビン酸ナトリウ
ム等の炭素源、塩類、界面活性剤並びにpH調整剤を所
定の濃度で含む合成酵素基質培地を一定量の被試験水中
に所定量添加し、36±1℃で合成酵素基質培地の種類
に応じて24〜48時間培養する。ここで、被試験水中
に大腸菌群が含まれている場合は、大腸菌群が栄養素に
より培養され、β−ガラクトシダーゼが生成する。生成
したβ−ガラクトシダーゼは、発色合成酵素基質である
XGalを加水分解し、青〜青緑色を呈する5,5−ジ
ブロモ−4,4−ジクロロインジゴを生成させる。これ
により、被試験水は青〜青緑色に変色するので、大腸菌
群を含むものと判定することができる。一方、被試験水
中に大腸菌群が含まれていない場合は、上述の合成酵素
基質培地を添加しても大腸菌群が培養されることはない
ので、被試験水中にβ−ガラクトシダーゼは生成しな
い。したがって、被試験水中において5,5−ジブロモ
−4,4−ジクロロインジゴは生成しないので、被試験
水は上述のような青〜青緑色に変色しない。この結果、
被試験水には大腸菌群が存在しないものと判定すること
ができる。
In the XGal-MUG method, 5-bromo-4-chloro-3-indolyl-β, which is a chromogenic synthase substrate, is used.
-D-galactopyranoside (commonly known as X-Gal), a synthetic enzyme substrate medium containing carbon sources such as peptone, which is a nutrient for coliform bacteria, and sodium pyruvate, salts, surfactants, and pH adjusters at predetermined concentrations Is added to a predetermined amount of water to be tested and incubated at 36 ± 1 ° C. for 24 to 48 hours depending on the kind of the synthetic enzyme substrate medium. Here, when the test water contains coliforms, the coliforms are cultured with nutrients to produce β-galactosidase. The produced β-galactosidase hydrolyzes XGal, which is a chromogenic synthase substrate, to produce 5,5-dibromo-4,4-dichloroindigo showing blue to blue-green color. As a result, the test water changes color from blue to blue-green, and it can be determined that the test water contains coliform bacteria. On the other hand, if the test water does not contain coliform bacteria, the coliform bacteria will not be cultured even if the above-mentioned synthetic enzyme substrate medium is added, and therefore β-galactosidase is not produced in the test water. Therefore, since 5,5-dibromo-4,4-dichloroindigo is not produced in the water under test, the water under test does not change its color from blue to blue-green as described above. As a result,
It can be determined that coliforms do not exist in the test water.

【0005】ところで、上述のようなXGal−MUG
法は、経験を積んだ検定者の手作業により実施され、被
試験水の変色は当該検定者が目視で判断しているため、
作業が煩雑である。このため、XGal−MUG法を簡
便に実施するためには、その自動化装置の開発が不可欠
となる。このような自動化装置においては、β−ガラク
トシダーゼによるXGalの加水分解により、被試験水
中に5,5−ジブロモ−4,4−ジクロロインジゴが生
成したか否か、すなわち、被試験水中に5,5−ジブロ
モ−4,4−ジクロロインジゴが存在するか否かを人間
の目視に頼らず機械的に正確に確認する必要がある。
By the way, the above-mentioned XGal-MUG
The method is carried out manually by an experienced inspector, and the discoloration of the water under test is visually judged by the inspector.
The work is complicated. Therefore, in order to easily carry out the XGal-MUG method, the development of an automated device thereof is indispensable. In such an automated device, whether or not 5,5-dibromo-4,4-dichloroindigo was produced in the water under test by hydrolysis of XGal with β-galactosidase, that is, 5,5 in the water under test. -It is necessary to accurately and mechanically confirm the presence of dibromo-4,4-dichloroindigo without relying on human visual inspection.

【0006】本発明の目的は、被試験水中に5,5−ジ
ブロモ−4,4−ジクロロインジゴが存在するか否かを
人間の目視に頼らずに確認することにある。
An object of the present invention is to confirm whether or not 5,5-dibromo-4,4-dichloroindigo is present in the water under test without depending on human visual inspection.

【0007】[0007]

【課題を解決するための手段】本発明の方法は、被試験
水中に5,5−ジブロモ−4,4−ジクロロインジゴが
存在するか否かを確認するための方法であり、被試験水
を透過する赤色光の透過率を測定する工程を含んでい
る。また、この方法は、例えば、赤色光の透過率が所定
の基準値を超えるか否かを判定する工程をさらに含んで
いる。
The method of the present invention is a method for confirming whether or not 5,5-dibromo-4,4-dichloroindigo is present in water under test. It includes the step of measuring the transmittance of the transmitted red light. The method further includes, for example, a step of determining whether or not the transmittance of red light exceeds a predetermined reference value.

【0008】[0008]

【発明の実施の形態】合成酵素基質培地法であるXGa
l−MUG法により水中に大腸菌群が存在するか否かを
判定する場合を例にして、本発明の実施の一形態に係る
5,5−ジブロモ−4,4−ジクロロインジゴの存否確
認方法を説明する。
BEST MODE FOR CARRYING OUT THE INVENTION XGa which is a synthetic enzyme substrate medium method
A method for confirming the presence / absence of 5,5-dibromo-4,4-dichloroindigo according to an embodiment of the present invention will be described by taking as an example the case where the presence or absence of coliform bacteria in water is determined by the 1-MUG method. explain.

【0009】XGal−MUG法により水中に大腸菌群
が存在するか否かを判定する場合は、石英ガラスなどの
透光性を有する無色透明の材料を用いて形成された容器
(例えば試験管)内に試験対象となる水(被試験水)を
注入する。ここで、被試験水の注入量は、通常、50m
lに設定する。
When the presence or absence of coliform bacteria in water is determined by the XGal-MUG method, a container (for example, a test tube) formed by using a transparent and colorless transparent material such as quartz glass is used. Inject water to be tested (water to be tested) into. Here, the injection amount of the test water is usually 50 m.
Set to l.

【0010】次に、容器内の被試験水中にXGal−M
UG法を実施するための合成酵素基質培地、すなわちX
Gal−MUG培地を所定量供給する。ここで用いられ
るXGal−MUG培地は、例えば、社団法人日本水道
協会発行、「上水試験方法2001 解説」842〜8
43頁の表に挙げられたXGal−MUG培地やピルビ
ン酸添加XGal−MUG培地である。因みに、ピルビ
ン酸添加XGal−MUG培地は、1リットル中におい
て次のような酵素基質、大腸菌群培養のための栄養成
分、塩類、界面活性剤およびpH調製剤を含みかつpH
が7.1±0.2に調整されたものである。
Next, XGal-M is added to the water under test in the container.
Synthetic enzyme substrate medium for carrying out the UG method, ie X
A predetermined amount of Gal-MUG medium is supplied. The XGal-MUG medium used here is, for example, “Water Supply Test Method 2001 Explanation” 842-8, issued by Japan Water Works Association.
These are the XGal-MUG medium and the pyruvate-added XGal-MUG medium listed in the table on page 43. Incidentally, the pyruvic acid-added XGal-MUG medium contains the following enzyme substrates, nutrients for coliform culture, salts, surfactants and pH adjusting agents in 1 liter, and
Is adjusted to 7.1 ± 0.2.

【0011】酵素基質 β−ガラクトシターゼと反応して発色する発色合成酵素
基質であるXGal(5−ブロモ−4−クロロ―3−イ
ンドリル−β−D−ガラクトピラノシド)を0.10
g、大腸菌群酵素誘導剤であるIPTG(1−イソプロ
ピル−β−D−1−チオガラクトピラノシド)を0.1
0gおよび大腸菌検出のための酵素基質であるMUG
(4−メチルアンベルリフェリル−β−グルクロニド)
を0.10g。大腸菌群培養のための栄養成分 ペプトンを5.0gおよびその他の炭素源としてピルビ
ン酸ナトリウムを1.0g。塩類 塩化物として塩化ナトリウムを5.0g、硝酸塩として
硝酸カリウムを1.0g。界面活性剤 ラウリル硫酸ナトリウムを0.10g。pH調整剤 リン酸二水素カリウムを1.0g、リン酸水素二カリウ
ムを4.0g。
XGal (5-bromo-4-chloro-3-indolyl-β-D-galactopyranoside), which is a chromogenic synthase substrate that develops color by reacting with the enzyme substrate β-galactosidase, was added to 0.10.
g, IPTG (1-isopropyl-β-D-1-thiogalactopyranoside), which is a coliform enzyme inducer, at 0.1
0 g and MUG, an enzyme substrate for E. coli detection
(4-methylambelliferyl-β-glucuronide)
0.10 g. 5.0 g of nutritional component peptone for coliform culture and 1.0 g of sodium pyruvate as another carbon source. Salts 5.0 g of sodium chloride as chloride and 1.0 g of potassium nitrate as nitrate. Surfactant 0.10 g of sodium lauryl sulfate. pH adjuster 1.0 g of potassium dihydrogen phosphate and 4.0 g of dipotassium hydrogen phosphate.

【0012】なお、上述のようなピルビン酸添加XGa
l−MUG培地は市販されており、一例として日水製薬
株式会社の商品名“ECブルー”を挙げることができ
る。
The pyruvic acid-added XGa as described above is used.
The l-MUG medium is commercially available, and as an example, the trade name “EC Blue” of Nissui Pharmaceutical Co., Ltd. can be mentioned.

【0013】次に、XGal−MUG培地が添加された
被試験水を十分に撹拌しながら36±1℃に加温し、被
試験水を大腸菌群の培養に適した環境に設定する。そし
て、当該温度で被試験水を24時間維持した後、被試験
水中に大腸菌群が存在するか否かを判定する。このよう
な培養環境において、被試験水が大腸菌群を含む場合、
この大腸菌群は、XGal−MUG培地により培養さ
れ、β−ガラクトシダーゼを生成する。このβ−ガラク
トシダーゼは、XGal−MUG培地中に含まれるXG
alを加水分解し、5,5−ジブロモ−4,4−ジクロ
ロインジゴを被試験水中に生成させる。一方、被試験水
が大腸菌群を含まない場合、被試験水中で大腸菌群が培
養されることはないので、被試験水中において5,5−
ジブロモ−4,4−ジクロロインジゴは生成しない。
Next, the water to be tested to which the XGal-MUG medium has been added is heated to 36 ± 1 ° C. with sufficient stirring, and the water to be tested is set in an environment suitable for culturing coliform bacteria. After maintaining the test water at the temperature for 24 hours, it is determined whether or not coliform bacteria are present in the test water. In such a culture environment, when the water under test contains coliform bacteria,
This coliform group is cultured in XGal-MUG medium to produce β-galactosidase. This β-galactosidase is the XG contained in the XGal-MUG medium.
Al is hydrolyzed to form 5,5-dibromo-4,4-dichloroindigo in water under test. On the other hand, if the test water does not contain coliform bacteria, the coliform bacteria will not be cultured in the test water, so that 5,5-
Dibromo-4,4-dichloroindigo does not form.

【0014】したがって、被試験水中に大腸菌群が存在
するか否かは、被試験水中に5,5−ジブロモ−4,4
−ジクロロインジゴが存在するか否かの確認により判定
することができる。そこで、次に、被試験水中における
5,5−ジブロモ−4,4−ジクロロインジゴの存否確
認方法を説明する。
Therefore, whether or not coliform bacteria are present in the test water depends on whether 5,5-dibromo-4,4 is present in the test water.
-Can be determined by checking whether dichloroindigo is present. Therefore, next, a method for confirming the presence or absence of 5,5-dibromo-4,4-dichloroindigo in the test water will be described.

【0015】5,5−ジブロモ−4,4−ジクロロイン
ジゴは、青〜青緑色を呈する物質であり、被試験水中に
微量に存在するだけで人間の目視で判定可能な程度に被
試験水を青〜青緑色に変色させる。このため、被試験水
が青〜青緑色に変色しているか否かを判定すると、被試
験水中に5,5−ジブロモ−4,4−ジクロロインジゴ
が存在するか否かを確認することができる。
5,5-Dibromo-4,4-dichloroindigo is a substance exhibiting a blue to blue-green color, and the amount of the water under test is such that it can be visually judged by humans even if it is present in a small amount in the water under test. Change color from blue to blue-green. Therefore, when it is determined whether or not the water under test changes color from blue to blue-green, it can be confirmed whether or not 5,5-dibromo-4,4-dichloroindigo is present in the water under test. .

【0016】被試験水が5,5−ジブロモ−4,4−ジ
クロロインジゴにより青〜青緑色に変色しているか否か
を判断する場合は、容器を挟んで赤色光の発光素子(例
えば、赤色ダイオード)とその受光素子とを配置する。
そして、発光素子から照射される赤色光を受光素子で受
光し、被試験水を透過する赤色光の透過率を測定する。
ここで、被試験水が青〜青緑色を呈しない場合は赤色光
の透過率が低下しにくいのに対し、被試験水が青〜青緑
色を呈すると赤色光の透過率が大幅に低下することか
ら、そのような赤色光の透過率の相違に基づいて被試験
水の青〜青緑色への変色を判断することができる。な
お、ここで用いる赤色光は、通常、600〜800nm
の範囲内の波長のものが好ましい。
When it is determined whether or not the water under test is discolored from blue to blue-green by 5,5-dibromo-4,4-dichloroindigo, a red light emitting element (for example, red light) is sandwiched between the containers. A diode) and its light receiving element.
Then, the red light emitted from the light emitting element is received by the light receiving element, and the transmittance of the red light passing through the water under test is measured.
Here, when the water under test does not exhibit blue to blue-green, the transmittance of red light is unlikely to decrease, whereas when the water under test exhibits blue to blue-green, the transmittance of red light significantly decreases. Therefore, the discoloration of the water under test from blue to blue-green can be judged based on such a difference in the transmittance of red light. The red light used here is usually 600 to 800 nm.
Those having a wavelength in the range of are preferable.

【0017】但し、大腸菌群以外の細菌を含む被試験水
に対してXGal−MUG法を実施すると、被試験水は
白濁し、赤色光の透過率がやはり低下することになる。
このため、被試験水が5,5−ジブロモ−4,4−ジク
ロロインジゴを含まず単に白濁しているだけ(便宜上、
「白濁」という)なのか、或いは5,5−ジブロモ−
4,4−ジクロロインジゴにより青〜青緑色に変色して
いる(便宜上、「変色」という)のかの判別が必要にな
る。
However, when the XGal-MUG method is carried out on the test water containing bacteria other than the coliform bacteria, the test water becomes cloudy and the red light transmittance also decreases.
For this reason, the water under test does not contain 5,5-dibromo-4,4-dichloroindigo and is simply clouded (for convenience,
"White turbidity") or 5,5-dibromo-
It is necessary to determine whether the color has changed from blue to blue-green by 4,4-dichloroindigo (for convenience, referred to as "color change").

【0018】そこで、白濁と変色とを判別するために、
通常は、白濁時の赤色光の透過率と変色時の赤色光の透
過率との差に基づいて、赤色光の透過率に判別のための
基準値を設定する。そして、赤色光の透過率が当該基準
値以上に低下している場合(すなわち、透過率が当該基
準値を超える場合)は変色と判定し、基準値未満の場合
は白濁と判定する。具体的には、XGal−MUG法を
実施中の被試験水が大腸菌群を含まず、大腸菌群以外の
細菌を含む場合、被試験水は、XGal−MUG培地の
存在下、36±1℃で24時間培養されると、図1に点
線で示すように赤色光の透過率が12時間を経過したあ
たりから白濁のために低下するが、その低下の程度は一
定レベルで維持される。これに対し、XGal−MUG
法を実施中の被試験水が大腸菌群を含む場合、すなわ
ち、被試験水中に5,5−ジブロモ−4,4−ジクロロ
インジゴが生成する場合、図1に実線で示すように赤色
光の透過率は15時間を経過したあたりから急激に低下
し続ける。このため、培養開始から24時間後(すなわ
ち、培養終了後)では、白濁の場合と変色の場合とでは
赤色光の透過率に大きな差(D)が生じる。したがっ
て、この差Dの範囲内において、赤色光の透過率につい
ての任意の基準値Xを設定すれば、赤色光の透過率が当
該基準値Xよりも高い側にあるか低い側にあるかを判定
することにより、変色か白濁か、すなわち、被試験水中
に5,5−ジブロモ−4,4−ジクロロインジゴが存在
するか否かを正確に確認することができる。
Therefore, in order to distinguish between white turbidity and discoloration,
Normally, a reference value for discrimination is set for the red light transmittance based on the difference between the red light transmittance during clouding and the red light transmittance during discoloration. Then, when the transmittance of red light is lower than the reference value (that is, when the transmittance exceeds the reference value), the color is determined to be discolored, and when it is less than the reference value, it is determined to be cloudy. Specifically, when the test water under the XGal-MUG method does not contain coliform bacteria but contains bacteria other than coliform bacteria, the test water is at 36 ± 1 ° C. in the presence of the XGal-MUG medium. When cultured for 24 hours, the transmittance of red light decreases after about 12 hours as shown by the dotted line in FIG. 1 due to cloudiness, but the degree of the decrease is maintained at a constant level. On the other hand, XGal-MUG
When the water under test during the method contains coliform bacteria, that is, when 5,5-dibromo-4,4-dichloroindigo is produced in the water under test, the transmission of red light is shown by the solid line in FIG. The rate continues to drop sharply after about 15 hours. Therefore, after 24 hours from the start of culture (that is, after the end of culture), a large difference (D) occurs in the transmittance of red light between the case of cloudiness and the case of discoloration. Therefore, if an arbitrary reference value X for the transmittance of red light is set within the range of the difference D, whether the transmittance of red light is higher or lower than the reference value X is set. By making a determination, it is possible to accurately confirm whether the color is discolored or cloudy, that is, whether or not 5,5-dibromo-4,4-dichloroindigo is present in the test water.

【0019】なお、上述の差Dは、発光装置および受光
装置の種類や感度により異なるので、判別のための基準
値Xは、これらの種類や感度等に応じて適宜設定するの
が好ましい。
Since the above-mentioned difference D differs depending on the type and sensitivity of the light emitting device and the light receiving device, it is preferable to appropriately set the reference value X for discrimination according to these types and sensitivity.

【0020】上述のように、この実施の形態では、被試
験水を透過する赤色光の透過率に基づいて、被試験水中
に5,5−ジブロモ−4,4−ジクロロインジゴが存在
するか否かを確認しているので、被試験水の色や可視紫
外光の吸収スペクトルを人間の目視で確認しなくても、
被試験水中における5,5−ジブロモ−4,4−ジクロ
ロインジゴの存否を機械的に正確に確認することができ
る。
As described above, in this embodiment, whether or not 5,5-dibromo-4,4-dichloroindigo is present in the water under test is determined based on the transmittance of red light that passes through the water under test. Since it is confirmed, it is possible to check the color of the water under test and the absorption spectrum of visible ultraviolet light with human eyes,
The presence or absence of 5,5-dibromo-4,4-dichloroindigo in the water under test can be accurately confirmed mechanically.

【0021】[0021]

【発明の効果】本発明に係る5,5−ジブロモ−4,4
−ジクロロインジゴの存否確認方法は、被試験水を透過
する赤色光の透過率を測定し、その透過率に基づいて
5,5−ジブロモ−4,4−ジクロロインジゴが被試験
水中に存在するか否かを判定しているので、被試験水中
に5,5−ジブロモ−4,4−ジクロロインジゴが存在
するか否かを人間の目視に頼らずに確認することができ
る。
Effect of the Invention 5,5-Dibromo-4,5 according to the present invention
-The method for confirming the presence or absence of dichloroindigo is to measure the transmittance of red light passing through the water under test and determine whether 5,5-dibromo-4,4-dichloroindigo is present in the water under test based on the transmittance. Since it is determined whether or not 5,5-dibromo-4,4-dichloroindigo is present in the water under test, it can be confirmed without relying on human visual inspection.

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

【図1】XGal−MUG法を実施中の被試験水におけ
る、赤色光の一般的な経時的透過率変化を示す図。
FIG. 1 is a diagram showing a general change in transmittance of red light over time in water under test during the XGal-MUG method.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 舘野 一博 愛媛県松山市堀江町7番地 株式会社三浦 研究所内 (72)発明者 寒川 良浩 愛媛県松山市堀江町7番地 株式会社三浦 研究所内 (72)発明者 高井 政貴 愛媛県松山市堀江町7番地 株式会社三浦 研究所内 (72)発明者 中岡 洋志 愛媛県松山市堀江町7番地 株式会社三浦 研究所内 Fターム(参考) 2G059 AA10 BB04 BB11 CC00 DD01 DD03 EE01 EE12 FF04 GG02 HH02 KK01 KK07 MM05    ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazuhiro Tateno             7 Horie-cho, Matsuyama City, Ehime Prefecture Miura Co., Ltd.             In the laboratory (72) Inventor Yoshihiro Samukawa             7 Horie-cho, Matsuyama City, Ehime Prefecture Miura Co., Ltd.             In the laboratory (72) Inventor Masataka Takai             7 Horie-cho, Matsuyama City, Ehime Prefecture Miura Co., Ltd.             In the laboratory (72) Inventor Hiroshi Nakaoka             7 Horie-cho, Matsuyama City, Ehime Prefecture Miura Co., Ltd.             In the laboratory F-term (reference) 2G059 AA10 BB04 BB11 CC00 DD01                       DD03 EE01 EE12 FF04 GG02                       HH02 KK01 KK07 MM05

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】被試験水中に5,5−ジブロモ−4,4−
ジクロロインジゴが存在するか否かを確認するための方
法であって、 前記被試験水を透過する赤色光の透過率を測定する工程
を含む、5,5−ジブロモ−4,4−ジクロロインジゴ
の存否確認方法。
1. 5,5-Dibromo-4,4-in test water
A method for confirming whether or not dichloroindigo is present, which comprises the step of measuring the transmittance of red light passing through the water under test, which comprises 5,5-dibromo-4,4-dichloroindigo. Existence confirmation method.
【請求項2】前記赤色光の透過率が所定の基準値を超え
るか否かを判定する工程をさらに含む、請求項1に記載
の5,5−ジブロモ−4,4−ジクロロインジゴの存否
確認方法。
2. The presence / absence confirmation of 5,5-dibromo-4,4-dichloroindigo according to claim 1, further comprising a step of determining whether or not the red light transmittance exceeds a predetermined reference value. Method.
JP2002020761A 2002-01-29 2002-01-29 Method for confirming the presence or absence of 5,5-dibromo-4,4-dichloroindigo Expired - Fee Related JP3922034B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014019454A (en) * 2012-07-13 2014-02-03 Suntory Holdings Ltd Beverage dispensing system
JP2019183636A (en) * 2017-12-05 2019-10-24 株式会社小松製作所 Control system of work machine, work machine, control method of work machine, and navigation controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014019454A (en) * 2012-07-13 2014-02-03 Suntory Holdings Ltd Beverage dispensing system
JP2019183636A (en) * 2017-12-05 2019-10-24 株式会社小松製作所 Control system of work machine, work machine, control method of work machine, and navigation controller

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