Extraction spectrophotometric method for lead determination
Creators
- 1. Tishreen Univ. Faculty of Sciences, Lattakia (Syrian Arab Republic), Dept. of Chemistry
- 2. Al-baath Univ. Faculty of sciences, Homs (Syrian Arab Republic), Dept. of Chemistry
Description
The possibility of formation a colored chelate between Pb and 1,5-diphenyl carbazide (DPCH) was studied to develop an extraction spectrophotometric method for lead determination. The reagent reacts in borate buffer (pH=8.3) to give a red-violet chelate after extraction with chloroform: pyridine (1:3), which has an absorption maximum at 522 nm. The stoichiometric composition of chelate is Cpb: DPCH = (1:1). The molar absorptivity and chelate constant formation were found to be 3.8 x 104 1.mol-1.cm-1 and 6 x 103 respectively, and we have studied all factors which affect on the complex formation and stability of its absorbance. Beer-Lambert was obeyed within the range (0.1 - 2)mg/l. The developed method was examined on lead standard solutions (RSD > 2.59%, recovery < 96.6). All results ensure the analytical possibility of the developed method.(author)
Additional details
Publishing Information
- Journal Title
- Tishreen University Journal for Research and Scientific Studies. Basic Sciences Series
- Journal Volume
- 31
- Journal Issue
- 3
- Journal Page Range
- p. 155-169
- ISSN
- 2079-3057
INIS
- Country of Publication
- Syrian Arab Republic
- Country of Input or Organization
- Syrian Arab Republic
- INIS RN
- 43125804
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- CHELATES; EXPERIMENTAL DATA; EXTRACTION; LEAD; SPECTROPHOTOMETRY; ULTRAVIOLET SPECTRA
- Descriptors DEC
- COMPLEXES; DATA; ELEMENTS; INFORMATION; METALS; NUMERICAL DATA; SEPARATION PROCESSES; SPECTRA
Optional Information
- Notes
- 18 Refs., 7 figs., 3 Tabs.