TY - JOUR AU - Muhammad A. R. Khan AU - Mohammed Sohel AU - Md. Ariful Islam AU - Faisal I Chowdhury AU - Shamim Akhtar PY - 2021/10/31 Y2 - 2024/03/29 TI - Refractive Indices of Aqueous Solutions of Isomeric Butylamines at 303.15 K: Experimental and Correlative Approach JF - Journal of Applied Science & Process Engineering JA - J. Appl. Sci. Process Eng. VL - 8 IS - 2 SE - Articles DO - 10.33736/jaspe.3962.2021 UR - https://publisher.unimas.my/ojs/index.php/JASPE/article/view/3962 AB - Refractive indices () and densities (r) of water (W) + n-butylamine (NBA), + sec-butylamine (SBA) and + tert-butylamine (TBA) systems had been measured in the whole range of composition at 303.15 K, from which deviation in refractive index (DnD ) molar refraction (Rm) and excess molar refraction () had been evaluated. All of the derived properties were fitted to appropriate polynomials. DnD were fitted to the Redlich-Kister polynomial equation. Values of DnD were all positive and were all negative which were attributed to cross hydrogen bonding, specific interactions as well as interstitial accommodation effect. A comparative study of Lorentz-Lorenz (L-L), Weiner (W), Heller (H), Gladstone-Dale (G-D), Arago-Biot (A-B), Eykman (Eyk), Newton (Nw), Eyring-John (E-J) and Oster (Os) relations for determining the refractive index of a liquid had been carried out to test their validity for the three binaries over the entire mole fraction range of butylamines at 303.15 K. ER -