5.2PurityofWater—Unlessotherwiseindicated,referencestowatershallbeunderstoodtomeanreagentwaterconformingtoSpeci cationD1193,TypeII.

5.3SodiumHydroxide,Solution,Standard(0.10N)—Pre-pareandstandardizeasdirectedinPracticeE200.

5.4StockSolutionNo.1—Dissolvetheindicatedamountsofthefollowingsaltsinwateranddilutetoatotalvolumeof7.0L.Storeinwellstopperedglasscontainers.

MgCl2·6H2O

CaCl2(anhydrous)SrCl2·6H2O

3889.0g(=555.6g/L)405.6g(=57.9g/L)14.8g(=2.1g/L)

Zn(NO3)2·6H2OPb(NO3)2AgNO30.151g0.066g0.0049g

NOTE3—TomaketheadditionofAgNO3intheabovesolution,dissolve0.049gofAgNO3inwateranddiluteto1L.Add100mLofthissolutiontoStockSolutionNo.3beforedilutingto10.0L.

5.5StockSolutionNo.2—Dissolvetheindicatedamountsofthefollowingsaltsinwateranddilutetoatotalvolumeof7.0Loraconvenientvolume.Storeinwellstopperedamberglasscontainers.

KCl

NaHCO3KBrH3BO3NaF

486.2g(=69.5g/L)140.7g(=20.1g/L)70.4g(=10.0g/L)19.0g(=2.7g/L)2.1g(=0.3g/L)

6.PreparationofSubstituteOceanWater

6.1Toprepare10.0Lofsubstituteoceanwater,dissolve245.34gofsodiumchlorideand40.94gofanhydroussodiumsulfatein8to9Lofwater.Add200mLofStockSolutionNo.1slowlywithvigorousstirringandthen100mLofStockSolutionNo.2.Diluteto10.0L.AdjustthepHto8.2with0.1Nsodiumhydroxidesolution.OnlyafewmillilitresofNaOHsolutionshouldberequired.

NOTE4—PreparethesolutionandadjustthepHimmediatelypriortouse.

5.6StockSolutionNo.3—Dissolvetheindicatedamountsofthefollowingsaltsinwateranddilutetoatotalvolumeof10.0Loraconvenientvolume.Storeinwellstopperedamberglasscontainers.

Ba(NO3)2

Mn(NO3)2·6H2OCu(NO3)2·3H2O

0.994g0.546g0.396g

7.PreparationofSubstituteOceanWaterwithHeavyMetals

7.1Add10mLofStockSolutionNo.3slowlyandwithvigorousstirringto10.0LofthesubstituteoceanwaterpreparedasdescribedinSection6.

8.Keywords

8.1substitutebrine;substituteoceanwater;substitutesaltwater;substituteseawater

APPENDIX

(NonmandatoryInformation)

POSITIONOFSUBSTITUTEOCEANWATER

X1.1ThesubstituteoceanwaterpreparedinaccordancewithSection6willhavethecompositionshownabovethelineinTableX1.1(upperhalfofthetable).Thesubstituteoceanwaterwithheavymetals,preparedinaccordancewithSection7,willhavethecompletecompositionshowninTable

X1.1.