Abstract: The design, setup and routine performance of systems for mass spectrometric measurement of Helium isotopes and Tritium of water samples by the He-3 ingrowth method are described using two systems operated in the noble gas laboratory of the Lamont-Doherty Earth Observatory as examples. Other Description: SELECTED PUBLICATIONS: OCEANOGRAPHY 1. Schlosser, P., Bayer, R., Boenisch, G., Cooper, L., Ekwurzel, B., Jenkins, W.J., Khatiwala, S., Pfirman, S., and Smethie, W.M., Jr., (1999), "Pathways and mean residence times of dissolved pollutants in the ocean derived from transient tracers and stable isotopes." Science of the Total Environment, 237/238: 15-30 2. Ekwurzel, B., Schlosser, P., Swift, J.H., Mortlock, R.A., and Fairbanks, R.F., (2001), "River runoff, sea ice meltwater, and Pacific water distribution and mean residence times in the Arctic Ocean." Journal of Geophysical Research, 106: 9075-9092 3. Khatiwala, S., Visbeck, M., and Schlosser, P., (2001), "Age tracers in an ocean GCM." Deep-Sea Research, 48: 1423-1441 4. Hohmann, R., Schlosser, P., Jacobs, S.S., Ludin, A., and Weppernig, R., (2002), "Excess helium and neon in the Southeast Pacific: tracers for glacial meltwater." Journal of Geophysical Research, 107(C11) 5. Hohmann, R., Schlosser, P., and Huber, B., (2003), "He-3 and dissolved oxygen balances in the upper waters of the Weddell Sea: implications for oceanic heat fluxes." Journal of Geophysical Research-Oceans, 108(C3087) 6. Srinivasan, A., Top, Z., Schlosser, P., Hohmann, R., Iskandarani, M., Olson, D.B., Lupton, J.L., and Jenkins, W.J., (2004), "Mantle He-3 distribution and deep circulation in the Indian Ocean." Journal of Geophysical Research, 109(C6) 7. Loose, B., Schlosser, P., Smethie, W.M., Jr., and Jacobs, S., (2009), "An optimized estimate of glacial melt from the Ross Ice Shelf, using noble gases, stable isotopes and CFC transient tracers." Journal of Geophysical Research-Oceans, 114(C08007) 8. Bianchi, D., Jorge L. Sarmiento, J.L., Gnanadesikan, A., Key, R., Schlosser, P., Newton, R., (2010), "Simulations of oceanic He-3 distribution suggest low rates of mantle degassing." Earth and Planetary Science Letters, 297: 379-386 9. Mauldin, A., P. Schlosser, R. Newton, W. M. Smethie Jr., R. Bayer, M. Rhein, P.E. Jones, (2010), "The velocity and mixing timescale of the Arctic Ocean Boundary Current estimated with transient tracers." Journal of Geophysical Research Oceans, 115(C08002) 10. Winckler, G., R. Newton, P. Schlosser, and T. J. Crone, (2010), "Mantle helium reveals Southern Ocean hydrothermal venting." Geophys. Res. Lett., 37(L05601) 11. Loose, B., and P. Schlosser, (2011), "Sea ice and its effect on CO2 transport between the atmosphere and the Southern Ocean interior." Journal of Geophysical Research, 116(C11019) SELECTED PUBLICATIONS: HYDROLOGY/AIR-WATER EXCHANGE 1. Rowe, G.L., Dunkle Shapiro, S., and Schlosser, P., (1999), "Use of environmental tracers to evaluate ground-water age and water quality trends in a buried-valley aquifer, Dayton, Ohio." Water-Resources Investigations Report 99-4113, U.S. Geological Survey, 81 pp. 2. Zheng, Y., Stute, M., van Geen, A., Gavrieli, I., Dhar, R., Simpson, H.J., Schlosser, P., and Ahmed, K.M., (2004), "Redox control of arsenic mobilization in Bangladesh groundwater." Applied Geochemistry, 19 (2): 201-214 3. Ho, D.T., R. Wanninkhof, P. Schlosser, D.S. Ullman, D. Hebert, K.F. Sullivan, (2011), "Towards a universal relationship between wind speed and gas exchange: Gas transfer velocities measured with He-3/SF-6 during the Southern Ocean Gas Exchange Experiment." Journal of Geophysical Research, 116(C00F04) 4. Yager, R., Plummer, N., Kauffman, L., Doctor, D., Nelms, D., and Schlosser, P., (2013), "Comparison of Age Distributions Estimated From Environmental Tracer Concentrations and Numerical Simulation in Fractured and Folded Karst: Shenandoah Valley of Virginia and West Virginia." Hydrogeology Journal, 21 (6): 1193-1217 5. Arslan, S., H. Yazicigil, M. Stute, P. Schlosser, and W. M. Smethie, Jr., (2014), "Analysis of groundwater dynamics in the complex aquifer system of Kazan Trona, Turkey, using environmental tracers and noble gases." Hydrogeology Journal, 23(1): 175-194