مجلة جامعة تشرين للبحوث والدراسات العلمية، سلسلة العلوم الأساسية (Apr 2019)
Chemical Analytical Study for Determination Nickel (II) in Aqueous Solutions Using Organic Reagent (HPHMAB) by Spectrophotometric Method
Abstract
The possibility of formatting a colored complex between Ni2+ ions and 4-Hydroxy-3-[[(2-hydroxy phenyl) methylene] amino] benzene Sulphonic Acid (HPHMAB) was studied by spectrophotometric method for determination of Nickel in aqueous solutions. The reagent reacts in aqueous medium at pH=7 to give a green- yellow complex with maximum absorbance at λmax=430nm. The stoichiometric composition of complex is CNi;HVMAB=(1:4). The molar absorptivity and complex constant formation were found to be ε=2.744×104 l. mol-1.cm-1 and βk =1.5382×105. We have studied all factors which affect the complex formation Ni-HPHMAB. Beer-Lambert was obeyed within the range (0.2-6) mg/l with a detection limit of 0.039 mg/l. The developed method was examined on Nickel standard solutions (RSD≤2.91%, recovery> 91 %). All results showed the accuracy, reliability and confirming the possibility of using the reagent (HPHMAB) to determination of Nickel.