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. (1375). A NOVEL AND HIGHLY SENSITIVE CATALYTIC METHOD FOR THE DETERMINATION OF ULTRA TRACE AMOUNTS OF CERIUM WITH SPECTROPHOTOMETRIC DETECTION. , 7(4), -.
. "A NOVEL AND HIGHLY SENSITIVE CATALYTIC METHOD FOR THE DETERMINATION OF ULTRA TRACE AMOUNTS OF CERIUM WITH SPECTROPHOTOMETRIC DETECTION". , 7, 4, 1375, -.
. (1375). 'A NOVEL AND HIGHLY SENSITIVE CATALYTIC METHOD FOR THE DETERMINATION OF ULTRA TRACE AMOUNTS OF CERIUM WITH SPECTROPHOTOMETRIC DETECTION', , 7(4), pp. -.
. A NOVEL AND HIGHLY SENSITIVE CATALYTIC METHOD FOR THE DETERMINATION OF ULTRA TRACE AMOUNTS OF CERIUM WITH SPECTROPHOTOMETRIC DETECTION. , 1375; 7(4): -.

A NOVEL AND HIGHLY SENSITIVE CATALYTIC METHOD FOR THE DETERMINATION OF ULTRA TRACE AMOUNTS OF CERIUM WITH SPECTROPHOTOMETRIC DETECTION

Journal of Sciences, Islamic Republic of Iran
مقاله 5، دوره 7، شماره 4، اسفند 1996    اصل مقاله (305.14 K)
چکیده
Cerium (IV) has a catalytic effect on the very slow redox reaction between
gallocyanine and bromate in acidic media. The reaction was monitored
spectrophotometrically at 525 nm by a fixed time method of 4.0 rnin from initiation
of the reaction. The decrease in absorbance at 525 nm is proportional to the Ce (IV)
concentration in the range of 0.005-1.000 and 1.00-10.00 pg. ml-l. The limit of
detection is 2.0 ng.ml-'. The relative standard deviation for ten replicate analyses of
0.100 pg.ml-' is 1.5%. The method is used for the determination of cerium in synthetic and in real samples, with good accuracy. The effect of interfering cations and anions was also studied.
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