A New Nanocatalytic Spectrophotometric Assay for Cationic Surfactant Using Phosphomolybdic Acid-Formic Acid-Nanogold as Indicator Reaction

In the pH 7.4 Na2HPO4-NaH2PO4 buffer solution, the cationic surfactant （CS） interacted with nanogold particles （NG） to form NG aggregations （NGA） that resulted in its color changing from wine red to blue-violet. NG has a strong catalysis on the formic acid-phosphomolybdic acid （PMo） colored reaction...

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Bibliographic Details
Published inChinese journal of chemistry Vol. 30; no. 1; pp. 59 - 64
Main Author 蒋治良 覃惠敏 梁爱惠
Format Journal Article
LanguageEnglish
Published Weinheim WILEY-VCH Verlag 2012
WILEY‐VCH Verlag
Wiley Subscription Services, Inc
Subjects
Absorption
Ammonium
Catalysis
cationic surfactant
nanogold catalysis
phosphomolybdic acid
spectrophotometry
Surfactants
光度法测定
十四烷基二甲基苄基氯化铵
指示反应
甲酸
磷钼酸
纳米催化
纳米金
阳离子表面活性剂
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ISSN1001-604X
1614-7065
DOI10.1002/cjoc.201100061

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Summary:In the pH 7.4 Na2HPO4-NaH2PO4 buffer solution, the cationic surfactant （CS） interacted with nanogold particles （NG） to form NG aggregations （NGA） that resulted in its color changing from wine red to blue-violet. NG has a strong catalysis on the formic acid-phosphomolybdic acid （PMo） colored reaction, but that of the NGA catalysis is weak. With the increase of CS concentration, the NGA increased and the NG decreased, the catalysis decreased and the absorption value at 700 nm decreased linearly. The concentrations of 6.25-250 nmol/L tetradecyl dimethyl benzyl ammonium chloride （TDBAC）, 0.625-250 nmol/L cetyltrimethyl ammonium bromide （CTMAB） and 12.5 -500 nmol-L 1 dodecyldimethylbenzyl ammonium chloride （DDBAC） had good linear responses to the decreased absorption value （AA70o nm）, with molar absorption coefficients of 2.2 × 106, 2.1 × 106 and 9 ×105 Lomol 1.cm 1 respectively. This method was simple, highly sensitive and low-cost.
Bibliography:31-1547/O6
Jiang, Zhiliang,Qin, Huimin, Liang, Aihui（Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education; Guangxi Key Laboratory of Environmental Engineering, Protection and Assessment; Guangxi Normal University, Guilin, Guizhou 541004, China）
nanogold catalysis, cationic surfactant, phosphomolybdic acid, spectrophotometry
In the pH 7.4 Na2HPO4-NaH2PO4 buffer solution, the cationic surfactant （CS） interacted with nanogold particles （NG） to form NG aggregations （NGA） that resulted in its color changing from wine red to blue-violet. NG has a strong catalysis on the formic acid-phosphomolybdic acid （PMo） colored reaction, but that of the NGA catalysis is weak. With the increase of CS concentration, the NGA increased and the NG decreased, the catalysis decreased and the absorption value at 700 nm decreased linearly. The concentrations of 6.25-250 nmol/L tetradecyl dimethyl benzyl ammonium chloride （TDBAC）, 0.625-250 nmol/L cetyltrimethyl ammonium bromide （CTMAB） and 12.5 -500 nmol-L 1 dodecyldimethylbenzyl ammonium chloride （DDBAC） had good linear responses to the decreased absorption value （AA70o nm）, with molar absorption coefficients of 2.2 × 106, 2.1 × 106 and 9 ×105 Lomol 1.cm 1 respectively. This method was simple, highly sensitive and low-cost.
ArticleID:CJOC201100061
ark:/67375/WNG-PQTJKTQG-7
istex:F3C79D0C7E069E593AA0E3BFC0335009C22E1E76
the National Natural Science Foundation of China - No. 21075023, 20965002, 20865002
the Research Funds of Guangxi Water Conservancy
the Natural Science Foundation of Guangxi - No. 0991021z
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1001-604X
1614-7065
DOI:10.1002/cjoc.201100061