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N-(1-萘基)乙二胺偶氮

English translation: spectrophotometry based on diazotization and coupling with N-(1-Naphthyl)ethylenediamine

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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
Chinese term or phrase:N-(1-萘基)乙二胺偶氮分光光度法
English translation:spectrophotometry based on diazotization and coupling with N-(1-Naphthyl)ethylenediamine
Entered by: Huijun Suo
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11:06 May 2, 2008
Chinese to English translations [PRO]
Science - Chemistry; Chem Sci/Eng
Chinese term or phrase: N-(1-萘基)乙二胺偶氮
N-(1-萘基)乙二胺偶氮
Denyce Seow
Singapore
Local time: 10:21
N-(1-naphthyl)ethylenediamine, diazotization and diazo coupling
Explanation:
苯胺类化合物的测定 - N-(1-萘基)乙二胺偶氮分光光度法
Determination of aniline compounds by spectrophotometric method based on diazotization and diazo coupling with N-(1-Naphthyl)ethylenediamine

http://www.sdinfo.net.cn/hjinfo/law/database/standards/analy...
水质 苯胺类化合物的测定 N-(1-萘基)乙二胺偶氮分光光度法
Water quality - Determination of aniline compounds - Spectrophotometric method with N-(1-naphthyl)ethylenediamine
GB 11889—89

1 主题内容与适用范围
本标准规定了测定水中苯胺类化合物的N-(1-萘基)乙二胺重氮偶合比色法。
本标准适用于地面水、染料、制药等废水中芳香族伯胺类化合物的测定。

2 原理
苯胺类化合物在酸性条件下(pHl.5—2.0)与亚硝酸盐重氮化,再与N—(1-萘基)乙二胺盐酸盐偶合,生成紫红色染料,进行分光光度法测定,测量波长为545nm。

http://www.chemgapedia.de/vsengine/vlu/vsc/en/ch/12/oc/vlu_o...
Diazonium Coupling (Diazo Coupling, Azo Coupling)

Due to their positive charge, diazonium cations, which are generated by treatment of aromatic amines with nitrous acid and a stronger mineral acid, may participate in an electrophilic aromatic substitution as an electrophile. The electrophilic reaction center is the terminal nitrogen of the -N=N+ group. As a result, two aromatic compounds are coupled by a -N=N- group. This is known as the azo group (diazo group). The corresponding reaction is called diazonium coupling (diazo coupling, azo coupling). However, the electrophilicity of diazonium ions is only relatively weak, as their positive charge is delocalized. The unsubstituted benzenediazonium cation may react only with strongly activated aromatic compounds, such as phenolates and amines.

http://dict.cnki.net/dict_result.aspx?searchword=重氮化偶联反应
重氮化偶联反应
diazotization-coupling(2)
diazotization-coupling reaction(1)
diazotization and coupling reaction(0)

A new method for the determination of nitrite ion is proposed by two-wavelength UV-Vis spectrophotometry. This method is based on the diazotization-coupling reaction of saforian O with nitrite ion in H_2SO_4 medium can result in a sensitive absorption at 518 nm and 348 nm.
在硫酸介质中,亚硝酸根与水溶性番红花红O发生重氮化偶联反应,在518 nm和348 nm处产生灵敏的吸收峰,根据两波长处吸光光度值的加和值和亚硝酸根浓度的线性关系,建立了一种分光光度法测定微量亚硝酸根的新方法。

http://www.springerlink.com/content/v1r4062q5u881m54/
Test determination of aniline in solutions based on azo coupling with analytical reagents incorporated into silicic acid xerogels









--------------------------------------------------
Note added at 7 hrs (2008-05-02 18:11:50 GMT)
--------------------------------------------------

苯胺类化合物的测定 - N-(1-萘基)乙二胺偶氮分光光度法
Spectrophotometric determination of aniline by diazotization and coupling with N-(1-Naphthyl)ethylenediamine

As the first link, with content copied from the official website of the Ministry of Environmental Protection, suggests, aniline compounds are first diazotized and then couple them with N-(1-Naphthyl)ethylenediamine to form "azo dyes" that are then measured with spetrophotometry.

--------------------------------------------------
Note added at 7 hrs (2008-05-02 18:14:40 GMT)
--------------------------------------------------

http://www.sepa.gov.cn/tech/hjbz/bzwb/shjbh/sjcgfffbz/199007...

It is a national standard for measuring the content of aniline compounds in water.

--------------------------------------------------
Note added at 7 hrs (2008-05-02 18:16:12 GMT)
--------------------------------------------------

Correction: ...are first diazotized and then couple THEM with > ...are first diazotized and then couple with

--------------------------------------------------
Note added at 7 hrs (2008-05-02 18:17:52 GMT)
--------------------------------------------------

http://www.google.com/search?hl=en&q="azo spectrophotometry"...

Spectrophotometric determination of aniline in aqueous solution by ...
Mosul, Iraq. Spectrophotometric Determination of Aniline in Aqueous. Solution by Azo-Dye Formation with Diazotized. p-Nitroaniline. S. A.. Rahim*, Nada ...
www.springerlink.com/index/JX424N88RGX70K01.pdf

Selected response from:

Huijun Suo
China
Local time: 10:21
Grading comment
Thank you very much, Huijun. Have a nice Sunday!
4 KudoZ points were awarded for this answer

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Summary of answers provided
4 +2N-(1-naphthyl)ethylenediamine, diazotization and diazo couplingHuijun Suo


Discussion entries: 2





  

Answers


5 hrs   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +2
N-(1-萘基)乙二胺,重氮(化-)偶合反应
N-(1-naphthyl)ethylenediamine, diazotization and diazo coupling


Explanation:
苯胺类化合物的测定 - N-(1-萘基)乙二胺偶氮分光光度法
Determination of aniline compounds by spectrophotometric method based on diazotization and diazo coupling with N-(1-Naphthyl)ethylenediamine

http://www.sdinfo.net.cn/hjinfo/law/database/standards/analy...
水质 苯胺类化合物的测定 N-(1-萘基)乙二胺偶氮分光光度法
Water quality - Determination of aniline compounds - Spectrophotometric method with N-(1-naphthyl)ethylenediamine
GB 11889—89

1 主题内容与适用范围
本标准规定了测定水中苯胺类化合物的N-(1-萘基)乙二胺重氮偶合比色法。
本标准适用于地面水、染料、制药等废水中芳香族伯胺类化合物的测定。

2 原理
苯胺类化合物在酸性条件下(pHl.5—2.0)与亚硝酸盐重氮化,再与N—(1-萘基)乙二胺盐酸盐偶合,生成紫红色染料,进行分光光度法测定,测量波长为545nm。

http://www.chemgapedia.de/vsengine/vlu/vsc/en/ch/12/oc/vlu_o...
Diazonium Coupling (Diazo Coupling, Azo Coupling)

Due to their positive charge, diazonium cations, which are generated by treatment of aromatic amines with nitrous acid and a stronger mineral acid, may participate in an electrophilic aromatic substitution as an electrophile. The electrophilic reaction center is the terminal nitrogen of the -N=N+ group. As a result, two aromatic compounds are coupled by a -N=N- group. This is known as the azo group (diazo group). The corresponding reaction is called diazonium coupling (diazo coupling, azo coupling). However, the electrophilicity of diazonium ions is only relatively weak, as their positive charge is delocalized. The unsubstituted benzenediazonium cation may react only with strongly activated aromatic compounds, such as phenolates and amines.

http://dict.cnki.net/dict_result.aspx?searchword=重氮化偶联反应
重氮化偶联反应
diazotization-coupling(2)
diazotization-coupling reaction(1)
diazotization and coupling reaction(0)

A new method for the determination of nitrite ion is proposed by two-wavelength UV-Vis spectrophotometry. This method is based on the diazotization-coupling reaction of saforian O with nitrite ion in H_2SO_4 medium can result in a sensitive absorption at 518 nm and 348 nm.
在硫酸介质中,亚硝酸根与水溶性番红花红O发生重氮化偶联反应,在518 nm和348 nm处产生灵敏的吸收峰,根据两波长处吸光光度值的加和值和亚硝酸根浓度的线性关系,建立了一种分光光度法测定微量亚硝酸根的新方法。

http://www.springerlink.com/content/v1r4062q5u881m54/
Test determination of aniline in solutions based on azo coupling with analytical reagents incorporated into silicic acid xerogels









--------------------------------------------------
Note added at 7 hrs (2008-05-02 18:11:50 GMT)
--------------------------------------------------

苯胺类化合物的测定 - N-(1-萘基)乙二胺偶氮分光光度法
Spectrophotometric determination of aniline by diazotization and coupling with N-(1-Naphthyl)ethylenediamine

As the first link, with content copied from the official website of the Ministry of Environmental Protection, suggests, aniline compounds are first diazotized and then couple them with N-(1-Naphthyl)ethylenediamine to form "azo dyes" that are then measured with spetrophotometry.

--------------------------------------------------
Note added at 7 hrs (2008-05-02 18:14:40 GMT)
--------------------------------------------------

http://www.sepa.gov.cn/tech/hjbz/bzwb/shjbh/sjcgfffbz/199007...

It is a national standard for measuring the content of aniline compounds in water.

--------------------------------------------------
Note added at 7 hrs (2008-05-02 18:16:12 GMT)
--------------------------------------------------

Correction: ...are first diazotized and then couple THEM with > ...are first diazotized and then couple with

--------------------------------------------------
Note added at 7 hrs (2008-05-02 18:17:52 GMT)
--------------------------------------------------

http://www.google.com/search?hl=en&q="azo spectrophotometry"...

Spectrophotometric determination of aniline in aqueous solution by ...
Mosul, Iraq. Spectrophotometric Determination of Aniline in Aqueous. Solution by Azo-Dye Formation with Diazotized. p-Nitroaniline. S. A.. Rahim*, Nada ...
www.springerlink.com/index/JX424N88RGX70K01.pdf



Huijun Suo
China
Local time: 10:21
Does not meet criteria
Native speaker of: Native in ChineseChinese
PRO pts in category: 19
Grading comment
Thank you very much, Huijun. Have a nice Sunday!

Peer comments on this answer (and responses from the answerer)
agree  karcsy: aniline + ethylenediamine = azo dye (violet colored solution that is measured with a spectrophotometer.)
27 mins
  -> Thanks for your expert information!

agree  ysun
2 hrs
  -> Thanks!
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Changes made by editors
May 4, 2008 - Changes made by Huijun Suo:
Edited KOG entry<a href="/profile/62648">Denyce Seow's</a> old entry - "N-(1-萘基)乙二胺偶氮" » "diazotization and coupling with N-(1-Naphthyl)ethylenediamine"


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