EXTRACTION-SPECTROPHOTOMETRIC DETERMINATION OF AMMONIUM ION BY DIBENZO- 18-CROWN-6 AND CALMAGITE
نویسندگان: ثبت نشده
چکیده مقاله:
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
منابع مشابه
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 absorptivity of the ternary complex at this wavelength is 1.08 10 mol cm . beer's law is obeyed over ...
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عنوان ژورنال
دوره 4 شماره 2
صفحات -
تاریخ انتشار 1993-06-01
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