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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.19 [2012] >
IJCT Vol.19(5) [September 2012] >
| Title: | Spectrophotometric determination of Neodymium(III), Samarium(III), Gadolinium(III), Terbium (III), Dysprosium (III) , Holmium (III) in micellar media |
| Authors: | Mathew, Asha
Kumar, AV Krishna
Shyamala, P
Satyanarayana, A
Rao, I M |
| Keywords: | Dysprosium
Gadolinium
Holmium
Micelles
Neodymium
Samarium
Spectrophotometry
Terbium |
| Issue Date: | Sep-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Spectrophotometric procedure for the
determination of metal ion representatives from the three subgroups of
lanthanide series, namely Neodymium (III) & Samarium (III) of Cerium group;
Gadolinium (III) & Terbium (III) of Terbium family and Dysprosium (III)
& Holmium (III) of Yttrium family has been studied using
1-(2-pyridylazo)-2-naphthol (PAN) as a chromogenic reagent in micellar media. The
reported procedure avoids the use of carcinogenic molecular solvents. The
method is based on the formation of an intense red colored ML3 type
of complex (L=PAN and M= Ln 3+) in the pH range 8.5–9.5, soluble in all
the three micellar media under study, viz. Sodium dodecyl sulphate
(SDS), Cetyl
trimethyl ammonium bromide (CTAB) and Triton X-100. All the systems show (6.2 – 9.18) × 104, (4.4 – 8.5) × 104 and (4.3 – 7.8) × 104 mol-1 cm-1
dm3 molar
absorptivity and (1.5 – 3.02) × 10-4, (1.7 – 2.96) × 10-4, (2.1 –
2.8) × 10-4 mg cm-2
Sandell’s sensitivity for Triton X, CTAB and SDS respectively. The tolerance
limits towards several foreign ions are also reported.
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| Page(s): | 331-336 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.19(5) [September 2012]
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