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*To*: Hanna Gilbert <hanna@xxxxxxxxxxxxxxx>*Subject*: Re: PHREEQC help*From*: "David L Parkhurst" <dlpark@xxxxxxxx>*Date*: Mon, 21 Oct 2002 09:05:29 -0600*Bcc*: "David L Parkhurst" <dlpark@xxxxxxxx>*In-reply-to*: <1034960553.3db03ea92b5c1@coral.hwr.arizona.edu>

I think this is closer to what you want. I don't know what HEPES is, so I haven't filled it in. The pHs of the solutions are guessed from the composition, if they are adjusted to a certain pH, then that information should be used. David TITLE Equilibrate water with growth media SOLUTION_MASTER_SPECIES Glucose Glucose 0.0 C6H12O6 180 SOLUTION_SPECIES Glucose = Glucose logk 0 SOLUTION 1 PURE WATER pH 7.0 temp 25.0 SOLUTION 2 1 M (NH4)2SO4 -units mol/kgw pH 7 charge N(-3) 2 S(6) 1 SOLUTION 3 .1 M MgSO4 -units mol/kgw pH 7 charge Mg 0.1 S(6) 0.1 SOLUTION 4 .2 M CaCl2 -units mol/kgw pH 7 charge Ca 0.2 Cl 0.4 SOLUTION 5 .1 M KH2PO4 -units mol/kgw pH 7 charge K 0.1 P 0.1 SOLUTION 6 .1 M Na2HPO4 -units mol/kgw pH 7 charge Na 0.2 P 0.1 SOLUTION 7 .01 M FeSO4 -units mol/kgw pH 7 charge Fe 0.01 S(6) 0.01 SOLUTION 8 1 M HEPES SOLUTION 9 .1 M Glucose -units mol/kgw Glucose 0.1 END MIX 10 Mixing solutions 1-9 1 0.9675 #Add 967.5 mL DI Water 2 0.002 #Add 2 mL (NH4)2SO4 3 0.0025 #Add 2.5 mL MgSO4 4 0.002 #Add 2.0 mL CaCL2 5 0.0015 #Add 1.5 mL KH2PO4 6 0.0025 #Add 2.5 mL Na2HPO4 7 0.001 #Add 1.0 mL FeSO4 8 0.001 #Add 1.0 mL HEPES 9 0.010 #Add 10.0 mL Glucose SAVE solution 11 EQUILIBRIUM_PHASES CO2(g) -3.5 END David Parkhurst (dlpark@xxxxxxxx) U.S. Geological Survey Box 25046, MS 413 Denver Federal Center Denver, CO 80225 Project web page: https://wwwbrr.cr.usgs.gov/projects/GWC_coupled

**References**:**PHREEQC help***From:*Hanna Gilbert

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