Publication Title: Salt enhanced solvent relaxation and particle surface area determination via rapid spin-lattice NMR Publication Authours: Laura N. Elliottab*, Richard A. Bournec, Ali Hassanpoura, John L. Edwardsd, Stephen Sutcliffed and Timothy N. Huntera Data set creator: Laura N. Elliott aSchool of Chemical andProcess Engineering, University of Leeds, Leeds, United Kingdom, LS2 9JT. bCentre for Doctoral Training in Complex Particulate Products and Processes, University of Leeds. cSchool of Chemistry, University of Leeds. dVenator, Titanium House, Hanzard Drive, Wynyard Park, Stockton-on-Tees, United Kingdom, TS22 5FD. *pmlne@leeds.ac.uk Abstract: This data set includes the original data used to produce figures for the publication title above.This paper demonstrates the influence of surface charge chemistry on the application of nuclear magnetic relaxation measurements (NMR relaxometry) for the in situ determination of particle surface area, in the presence of high electrolyte concentration. Specifically, dispersions of titania, calcite and silica with and without 1 M KCl were investigated. The addition of salt, showed no significant change to relaxation measurements for titanium dioxide; however, a significant rate enhancement was observed for both calcite and silica systems. Experimental data: Particle size analysis with and without electrotlye, surface charge, NMR silica (ludox) calibration and relaxation rate data for titanium didoxide, silica and calcite with and without electrolyte. BET surface area isothermal data and pore size distributions for titanium didoxide, silica and calcite. Funders: The Engineering and Physical Sciences Research Council (EPSRC, UK) (EP/L015285/1) and Venator (Titanium House, Hanzard Drive, Wynyard Park, Stockton-on-Tees, United Kingdom, TS22 5FD.) Academic subject: Chemical Engineering Institutial division: School of Chemical and Process Engineering, University of Leeds, Leeds, United Kingdom, LS2 9JT Main Figures in publication: File name:Figure_2_Zetapotentials Figure 2: Zetapotentials for TiO2a (triangle), calcite (circle), and silicab (square) in background electrolyte (1x10-4 M KCl) with the neutral pH indicated*. File name:Figure_3_Mastersizer Figure 3: Particle size distributions from laser diffraction for sonicated calcite (circle), and TiO2a (triangle) dispersions without salt. File name:Figure_4_Camsizer Figure 4: Particle size distribution from dynamic image analysis (a) TiO2a (triangle), and (b) calcite (circle), both in the presence of 0 M KCl (closed) and 1 M KCl (open). File name:Figure_5_Zetasizer Figure 5: Particle size distribution for silicab particles after 24 hours of mixing on carousel at 1 wt%, in the presence of 0 M KCl (closed) and 1 M KCl (open). File name:Figure_6_Lumsizer Figure 6: Average Lumisizer interface versus time measurements at 300 rpm for 1 vol% dispersions undergoing sedimentation, of TiO2a (a) and calcite (b) in 0 M (black closed), 0.1 M (red open) and 1 M (black open) KCl. Dashed lines indicate the linear rates. File name:Figure_7_NMR_Ludox_Calibration Figure 7: Calibration measurements for silicaa (Ludox standard) particles (a) relaxation time vs particle to volume ratio and (b) average relaxation rates with the product of increasing particle volume ratio and known silicaa surface area (137 m2/g). File name:Figure_8_TiO2_A_and_B_NMR Figure 8: (a) shows average relaxation times (T1) for TiO2a with increasing particle concentration (fp) with and without 1 M KCl. (b) Relative relaxation rate enhancement (Rsp) for TiO2a with increasing particle concentration in 0 M KCl (closed triangle) and 1 M KCl (open triangle). (c) TiO2b relative relaxation rate enhancement in 0 M KCl. File name:Figure_9_Calcite_NMR Figure 9: Relative relaxation rate enhancement (Rsp) for calcite with increasing particle concentration in 0 M KCl (closed circle) and 1 M KCl (opencircle). File name:Figure_10_silica_b_NMR Figure 10: Relative relaxation rate enhancement (Rsp) for 100 nm silicab with increasing particle concentration in 0 M KCl (closed) and 1 M KCl (open). Sup Figures in publications: File name: Sup_Figure_2_and_3_TiO2A_Calcite_BET Figure S2: N2 adsorption-desorption isotherms and total pore volumes for TiO2a. File name: Sup_Figure_2_and_3_TiO2A_Calcite_BET Figure S3: N2 adsorption-desorption isotherms and total pore volumes for calcite. File name: Sup_Figure_4_Silica_b_BET Figure S4: N2 adsorption isotherm for 100 nm silicab. File name: Sup_Figure_5_TiO2_A_XRD Figure S5: Powder XRD profiles for TiO2 at room temperature.