Microdetermination of secondary aliphatic amines using a copper ion-selective electrode |
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| Authors: | Saad SM Hassan Fayez S Tadros Walter Selig |
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| Institution: | 2. Lawrence Livermore National Laboratory, University of California, Livermore, California 94550, U.S.A.;1. Department of Chemistry, Faculty of Science, Ain Shams University, Cairo, Egypt |
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| Abstract: | A simple, accurate, and selective method is described for the microdetermination of aliphatic secondary amines. The method is based on their reaction with carbon disulfide and ammoniacal copper sulfate at 40 °C for 30 min to yield copper dialkyldithiocarbamate. The excess copper is then measured by titration with EDTA or NaDDC using a copper ion-selective electrode. A mean recovery of 98.2% with a standard deviation of 0.8% is obtained for aliphatic secondary amines and their salts having a wide range of pKa. |
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| Keywords: | To whom correspondence should be addressed |
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