Spectrophotometric Determination of Trace Amounts of Lead with Safranine O in Synthetic Sea Water and Zinc Sulphate | ||
| Journal of High Institute of Public Health | ||
| Article 17, Volume 32, Issue 4, October 2002, Pages 921-926 | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jhiph.2002.206456 | ||
| Author | ||
| Amira S. Al-Attas* | ||
| Chemistry Department, Girls College for Education, Jeddah, Saudi Arabia | ||
| Abstract | ||
| A highly selective and sensitive Spectrophotometric procedure for the determination of lead is developed. This is based on the interaction of iodide complex of lead with safranine O to form an orange product which absorbs maximally at 494 nm. The complex formed is stable for 2 h when stabilized with polymer. The Pb-l-safranine complex was fully formed in the pH range 3.5-4.5 and solution should contain appropriate concentrations of I and safranine O. 50 fold amounts of various cations and anions do not interfere in the determination of 0.1-10 µg of lead [ɛ = 8.62x104 1 mol -1cm-1]. The method is precise and has been applied to synthetic sea water samples and zinc sulphate materials. | ||
| Keywords | ||
| Spectrophotometric Determination; Safranine O; Synthetic Sea Water; Zinc Sulphate | ||
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