| Determination of Dimethylallylamine by Titration in Nonaqueous Solvent |
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| 作者姓名： | 刘立华 龚竹青 郑雅杰 |
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| 作者单位： | [1]CollegeofChemistryandChemicalEngineering,HunanUniversityofScienceandTechnology,Xiangtan411201 [2]MetallurgicalPhysicalChemistryInstitute,CentralSouthUniversity,Changsha410083 |
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| 摘 要： | The content of dimethylallylamine was determined using glacial acetic acid as solvent, acetic-formic mixture as an anhydrite, perchloric acid-glacial acetic acid as titrant, and 1% crystal violet in acetic acid as indicator in the presence of methylamine and dimethylamine The influences of inert constituents and water on the titration were investigated, and a complete analytical method was determined. The results showed that the determination error of total amines increased with water increasing, while the effect of water on the determination of dimethylallylamine was little when the amount of water was within 5%, the relative error was generally within 1%, and that the end-point was acutely when about 10% chloroform was added. Compared with gas chromatography, this method is simple, convenient and accurate.
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| 关 键 词： | DMAA 非水滴定 非水溶剂 乙酸溶剂 紫水晶体 |
Determination of Dimethylallylamine by Titration in Nonaqueous Solvent |
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| LIU Li-hua,GONG Zhu-qing,ZHENG Ya-jie.Determination of Dimethylallylamine by Titration in Nonaqueous Solvent[J].Journal of Donghua University,2004,21(5):124-127. |
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| Authors: | LIU Li-hua GONG Zhu-qing ZHENG Ya-jie |
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| Institution: | 1. College of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201
2. Metallurgical Physical Chemistry Institute, Central South University, Changsha 410083 |
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| Abstract: | The content of dimethylallylamine was determined using glacial acetic acid as solvent, acetic-formic mixture as an anhydrite, perchloric acid-glacial acetic acid as titrant, and 1% crystal violet in acetic acid as indicator in the presence of methylamine and dimethylamine The influences of inert constituents and water on the titration were investigated, and a complete analytical method was determined. The results showed that the determination error of total amines increased with water increasing, while the effect of water on the determination of dimethylallylamine was little when the amount of water was within 5%, the relative error was generally within 1%, and that the end-point was acutely when about 10% chloroform was added. Compared with gas chromatography, this method is simple, convenient and accurate. |
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| Keywords: | Dimethylallylamine(DMAA) Non-aqueous titration acetic acid Acetic-formic mixed anhydrite Perchloric glacial acetic acid Crystal violet |
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