Water Activity of NaCl Nano-Droplets in addition to Its Correlation with HNO3 Uptake THOMAS DAVID SAUL, M.P.Tolocka & M.V.Johnston INTRODUCTION Sea-salt is the dominant aerosol species by mass above the oceans. Heterogeneous reactions involving nitric acid vapor in addition to sea-salt aerosols contribute to the tropospheric halogen budget: HNO3 (g) + NaCl (aq) NaNO3 (aq) + HCl (g).

Water Activity of NaCl Nano-Droplets in addition to Its Correlation with HNO3 Uptake THOMAS DAVID SAUL, M.P.Tolocka & M.V.Johnston INTRODUCTION 	Sea-salt is the dominant aerosol species by mass above the oceans. Heterogeneous reactions involving nitric acid vapor in addition to sea-salt aerosols contribute to the tropospheric halogen budget: HNO3 (g) + NaCl (aq)  NaNO3 (aq) + HCl (g). www.phwiki.com

Water Activity of NaCl Nano-Droplets in addition to Its Correlation with HNO3 Uptake THOMAS DAVID SAUL, M.P.Tolocka & M.V.Johnston INTRODUCTION Sea-salt is the dominant aerosol species by mass above the oceans. Heterogeneous reactions involving nitric acid vapor in addition to sea-salt aerosols contribute to the tropospheric halogen budget: HNO3 (g) + NaCl (aq) NaNO3 (aq) + HCl (g).

Reuter, Steve, Financial Editor and Morning Show Contributor has reference to this Academic Journal, PHwiki organized this Journal Water Activity of NaCl Nano-Droplets in addition to Its Correlation with HNO3 Uptake THOMAS DAVID SAUL, M.P.Tolocka & M.V.Johnston INTRODUCTION Sea-salt is the dominant aerosol species by mass above the oceans. Heterogeneous reactions involving nitric acid vapor in addition to sea-salt aerosols contribute to the tropospheric halogen budget: HNO3 (g) + NaCl (aq) NaNO3 (aq) + HCl (g). Under many atmospheric conditions, the relative humidity is sufficient as long as sea-salt aerosols to exist as concentrated aqueous droplets. Water content in addition to solute composition are important constituents in the uptake in addition to reaction of nitric acid vapor with marine aerosols. In this work, the water content of (Dd~100nm) NaCl nano-droplets in addition to mixed aerosols (NaCl+MgCl2) is investigated to underst in addition to its relationship with HNO3 uptake. Single-Particle Mass Spectrometry is employed to monitor aerosol solute composition with reaction. FIG.2: Relative Ion Response -obtained from the integrated signals of chloride in addition to nitrate in each particle. RDMA Aerosol Size-Selection Humidify Carrier Gas Stream Nebulize Salt Solution MIX Generate HNO3 (g) PTFE Lined Flow-Tube Reaction Chamber Monitor [HNO3] (g) SMPS NAFION Diffusion Dryer Mass to Charge Ratio (m/Z) FIG.1: Negative Ion Mass Spectrometric Response Single-Particles of Known Composition Experimental Design University of Delaware – Department of Chemistry & Biochemistry FIG.3: Hygroscopic Growth with Water Vapor. FIG.4: Efflorescence of NaCl in addition to Mixed Aerosol FIG.5: Dd~100 nm Reactivity with [HNO3]. FIG.6: HNO3 Uptake in addition to its Correlation to Aerosol Solute Composition & Water Content. Particle phase water facilitates the reactive uptake of nitric acid with marine aerosols. Future measurements will include additional Rx times, HNO3 concentrations, in addition to particle compositions. Magnesium suppresses NaCl efflorescence. Surface water, present at low RHs, aids aerosol nitrification in addition to subsequent HCl release. FUNDING: CHE-0098831 CONCLUSIONS

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