Sajjad Ullah

twas-cnpq cnpq twas phd scholarship uv visible spectroscopy solubility product ksp solubility common ion effect sampling analytical chemistry indicators titration curves base acids ph molecular absorption electronic spectroscopy atomic spectroscopy elemental analysis aas atomic absorption research in brazil phd scholarships scholarships higher education brazil brazil scientific writing insert reference references mendeley desktop moisture determination water determination kft karl fischer titaration extinction scattering tauc plot band gap diffuse reflectance drs braggs equation diffraction crystalline phase material characterization miller indices xrd atomic fluorescence spectroscopy afs icp-aes aes icp atomic emission radiometric titrations isotopic dilution method half life radioactivity radiochemical instrumental naa neutron activation analysis activation analysis