EXTRACTION-SPECTROPHOTOMETRIC DETERMINATION OF AMMONIUM ION BY DIBENZO- 18-CROWN-6 AND CALMAGITE
An extraction-spectrophotometric method for the determination of trace amounts of ammonium ion is described. Ammonium ion is effectively extracted as a neutral ternary complex NH . DB 18C6. calmagite at pH 3.0 into chloroform, followed by spectrophotometric determination at =48 5 nm. Molar absorpti...
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| Format: | Article |
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| Language: | English |
| Published: |
University of Tehran
1993-06-01
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| Series: | Journal of Sciences, Islamic Republic of Iran |
| Online Access: | https://jsciences.ut.ac.ir/article_31398_ac3c9d1f32105a6fc85ad3a172cdee87.pdf |
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| Summary: | An extraction-spectrophotometric method for the determination of trace amounts
of ammonium ion is described. Ammonium ion is effectively extracted as a neutral
ternary complex NH . DB 18C6. calmagite at pH 3.0 into chloroform, followed by
spectrophotometric determination at =48 5 nm. Molar absorptivity of the ternary
complex at this wavelength is 1.08 10 mol cm . Beer's law is obeyed over the
range 0.5-9.0 g ml and the Sandell's sensitivity for 0.001 absorbance unit is 16.7
ng cm . The method is simple, rapid and free from interferences of several cations
and anions which are usually present with NH ion in real samples |
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| ISSN: | 1016-1104 2345-6914 |