Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1237251 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2009 | 4 Pages |
Abstract
Optical test strip based on the use of Br-PADAP as a sensitive reagent immobilised into sol-gel thin film for detection of Hg(II) in aqueous solution had been thoroughly carried out. It has a square-sensing zone (1.0 cm Ã 1.0 cm) containing the sensitive reagent necessary to produce response to trace level of mercury. This method offer sensitivity and simplicity in detecting Hg(II) as no prior treatment or extraction is required. A linear response was attained in the Hg(II) concentration in the range of 0.5-2.5 ppm with calculated limit of detection of 6.63 ppb. This method also showed a reproducible result with relative standard deviation (R.S.D.) of 2.15% and response time of â¼5 min. Interference studies showed that Al(III), Co(II) and Ni(II) significantly interfered during the determination. The developed sensor has been validated against Atomic Absorption Spectroscopy method and proven comparable.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Nor Azah Yusof, Wan Abdul Rahman Wan Abdul Kadir,