2-Hydroxy-1-naphthaldehyde-p-hydroxybenzoic hydrazone as a spectropho-tometric reagent for the determination of lanthanum (III)
IR@NISCAIR: CSIR-NISCAIR, New Delhi - ONLINE PERIODICALS REPOSITORY (NOPR)
View Archive Info| Field | Value | |
| Creator |
Chowdary, P Govinda
Reddy, K P P R Mohan Reddy, V Krishna Reddy, P Raveendra |
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| Date |
2008-10-03T11:21:08Z
2008-10-03T11:21:08Z 2008-09 |
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| Identifier |
0376-4710
http://hdl.handle.net/123456789/2146 |
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| Description |
1381-1383
A new chromophore, 2-hydroxy-1-naphthaldehyde-p-hydroxybenzoic hydrazone has been used for the determination of lanthanum (III). The reagent reacts with lanthanum (III) in aque-ous dimethyl formamide in wide pH range forming brownish yellow coloured 2:3 (M:L) soluble complex with max at 415 nm. The colour intensity further increases in the cetyl trimethyl am-monium bromide micellar medium (0.1%) at room temperature. Beer’s law is obeyed in the range 0.277-8.334 μg mL⁻¹ and 0.008-2.639 μg mL⁻¹ of La(III) in direct and derivative methods, respectively. The molar absorptivity, Sandell’s sensitivity, detec-tion limit, determination limit and relative standard deviation are found to be: 2.3810⁴ L mol⁻¹ cm⁻¹, 0.006 μg cm⁻², 0.035 μg mL⁻¹, 0.106 μg mL⁻¹ and 0.42%, respectively. The second order derivative spectrophotometric method developed for the determi-nation of lanthanum (III) shows greater sensitivity and selectivity. The proposed direct and derivative methods are applied for the determination of lanthanum in standard lanthanum samples. |
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| Language |
en_US
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| Publisher |
CSIR
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| Relation |
Int. Cl.⁸ G01N21/25
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| Source |
IJCA Vol.47A(9) [September 2008]
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| Title |
2-Hydroxy-1-naphthaldehyde-p-hydroxybenzoic hydrazone as a spectropho-tometric reagent for the determination of lanthanum (III)
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| Type |
Article
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