Langmuir Aggregation of Congo Red on CPC and Its Application

Xiang-hu LIU; Jiao-rong REN; Ya-nan HUANG; Jing BAI; Hong-wen GAO

Makale detayları

Langmuir Aggregation of Congo Red on CPC and Its Application

Yazarlar:

Xiang-hu LIU | Jiao-rong REN | Ya-nan HUANG | Jing BAI | Hong-wen GAO

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2008 Vol.32 Issue 5, pp.549-559

Belge Tipi:

Makale

Yayın Tarihi:

4/2008

Belge Dili:

Türkçe

Document ID (Org No.):

2000728433

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

In this paper, microsurface adsorption-spectral correction  technique (MASCT) was used to research the interaction between  negatively charged sodium diphenyl diazo-bis-a  -naphthylamine-4-sulfonate (Congo Red, CR) and positively charged  cetylpyridinium chloride (CPC) in a pH 2.03 BR buffer solution.  The  experiment results indicate that CR was absorbed on the surface of CPC  mainly through electrostatic attraction.  This aggregation obeys the  Langmuir isothermal adsorption equation.  The maximal binding number  of CR to CPC was calculated to be 1.2 and the adsorption constant was  about 2.03 \times 105 L/mol.  This CR-CPC binding product is  insensitive to a concentrated electrolyte solution, but higher  temperature influences this aggregation.  By combining this reaction  with the absorbance ratio difference (ARD) theory, a new method was  established to determine CPC in natural water.  The analytical results  show that this method is suitable for the determination of trace level  CPC in natural water.  It is an effective method because no organic  hydrophobic solvent and time consuming 2-phase extraction operation  are involved.  It is the first time that ARD is used for the  determination of cationic surfactant, and it will be widely used in  future.

 

In this paper, microsurface adsorption-spectral correction  technique (MASCT) was used to research the interaction between  negatively charged sodium diphenyl diazo-bis-a  -naphthylamine-4-sulfonate (Congo Red, CR) and positively charged  cetylpyridinium chloride (CPC) in a pH 2.03 BR buffer solution.  The  experiment results indicate that CR was absorbed on the surface of CPC  mainly through electrostatic attraction.  This aggregation obeys the  Langmuir isothermal adsorption equation.  The maximal binding number  of CR to CPC was calculated to be 1.2 and the adsorption constant was  about 2.03 \times 105 L/mol.  This CR-CPC binding product is  insensitive to a concentrated electrolyte solution, but higher  temperature influences this aggregation.  By combining this reaction  with the absorbance ratio difference (ARD) theory, a new method was  established to determine CPC in natural water.  The analytical results  show that this method is suitable for the determination of trace level  CPC in natural water.  It is an effective method because no organic  hydrophobic solvent and time consuming 2-phase extraction operation  are involved.  It is the first time that ARD is used for the  determination of cationic surfactant, and it will be widely used in  future.

Makale detayları

Langmuir Aggregation of Congo Red on CPC and Its Application

Yazarlar: Xiang-hu LIU | Jiao-rong REN | Ya-nan HUANG | Jing BAI | Hong-wen GAO

Yayıncı: TUBITAK

Dergi: Turkish Journal of Chemistry 2008 Vol.32 Issue 5, pp.549-559

Belge Tipi: Makale

Yayın Tarihi: 4/2008

Belge Dili: Türkçe

Document ID (Org No.): 2000728433

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

Xiang-hu LIU | Jiao-rong REN | Ya-nan HUANG | Jing BAI | Hong-wen GAO

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2008 Vol.32 Issue 5, pp.549-559

Belge Tipi:

Makale

Yayın Tarihi:

4/2008

Belge Dili:

Türkçe

Document ID (Org No.):

2000728433

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527