Spectrophotometric Determination of Lithium Ion in Coastal Waters of Chabahar Bay using Thorin Ligand

In the present study, in an efficient and selective method, Thorin as a reagent was used by forming colour in the alkaline water–acetone media for direct spectrophotometric determination of lithium ion in the coastal seawater of Chabahar bay. Affective factors on the lithium-thorin complex formation reaction such as reaction time, concentration of thorin and the percent of potassium hydroxide and acetone were studied and optimized. Under optimum conditions, the limit of detection, linearity range relative and standard deviation of method were obtained as 0.039 mg/L, 0.10-1.3 mg/L, 9.11% (n =7), respectively and the average concentration of lithium in seawater of Chabahar Bay was estimated as 0.173 mg/L. Furthermore the effect of different depth on the dispersal of lithium in Chabahar Bay was investigated. The results showed that there were no significant differences among Li concentrations in different depths