APPLICATION OF POLYDIACETYLENE REAGENTS IN SIMPLE FLOW INJECTION SPECTROPHOTOMETRIC SYSTEM FOR DETERMINATION OF LEAD IONS
DOI:
https://doi.org/10.14456/lsej.2021.14Keywords:
Flow injection, Lead, Polydiacetylene, SurfactantAbstract
The purpose of this research was to apply polydiacetylenes reagents in a simple flow injection spectrophotometric system for determination of lead ions. The reagent was prepared by mixing of 10,12-pentacosadiynoic acid (PCDA) and sodium dodecyl sulphate (SDS) as ratio 1:5 mol. Then, the mixture forms conjugated polymer upon uv-irradiation. The fresh blue suspension can be used as reagent in the flow injection spectrophotometric system. The experimental conditions were optimized such as concentration of poly(PCDA/SDS), volume of reagent loop, length of mixing coil , flow rate and stop time. The calibration curve was in the range of 0 – 100 ppm. The limit of detection and the limit of quantitation were 0.59 and 1.98 ppm, respectively. The recoveries were in the range of 94.5 – 98.7% and the sample throughput was 27 samples per hour. This technique was found to be good accurate and precision. The propose method was applied to determine amount of lead (Pb2+) in water samples. All results were in good agreement with those obtained from a flame atomic absorption spectroscopy (FAAS) method.
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