Chapter Page 



H. THE SHIPBOARD CHEMISTRY LABORATORY— Continued 



Sto\vag;e of Chemicals H-2 



Handiino; Chemicals and First Aid Measures H-2 



Cleaning General Laboratory Equipment H-3 



Cleaning; Burettes and Pipettes H-3 



Prejiarino; and Handling; the Acid-Dichromate Cleaning; Solution H-3 



I. SALINITY DETERMINATION OF SEA WATER SAMPLES I-l 



General I-l 



Standard Sea Water I-l 



Salinity Determination by Knudsen Method 1-2 



Chemicals Required 1-2 



Apparatus Required 1-2 



Tables and Log Sheet Required 1-2 



The Automatic Pipette and Knudsen Automatic Burette 1-2 



Setting Up the Titration Apparatus 1-2 



Preparing the Indicator Solution 1-4 



Preparing the Silver Nitrate Solution 1-4 



Standardization of Silver Nitrate Solution 1-5 



Titration of a Sea Water Sample 1-5 



Standardizing and Adjusting the Silver Nitrate Solution 1-7 



Computing the D-Sheet 1-7 



Securing the Apparatus After Completing the Titration I-IO 



Maintenance and Repair of Apparatus I-IO 



Salinity Determination by Electrical Conductivity Method I-ll 



Equipment Used I-l 1 



Setting Up the Salinometer I-l 1 



Preliminary Checkout I-l 1 



Filling, Rinsing, and Draining the Sample Cell I-ll 



Analysis of Salinity Samples 1-14 



Maintenance of Induction Salinometer 1-17 



Trouble Shooting 1-17 



Model 6220 Laboratory Salinometer 1-20 



J. DISSOLVED OXYGEN CONTENT DETERMINATION OF SEA WATER SAMPLES. J-1 



General J-1 



Modified Winkler (Macro) Method J-1 



Chemicals Required J-1 



Apparatus Required J-1 



Setting Up the Apparatus J-2 



Preparing the Reagents J-2 



Treating (Macro) Winkler Oxygen Samples J-3 



Analysis of Oxygen Samples by (Macro) Winkler Technique J-3 



Securing the Apparatus After Completing the Titrations J-6 



The Chesapeake Bay Institute Technic[ue for the Winkler Method J-7 



Chemicals Required J-7 



Apparatus Required J-7 



Setting Up the Apparatus J-7 



Preparing the Reagents J-8 



Treating Oxygen Samples J-9 



Analysis of Oxygen Samples J-10 



Securing the Apparatus After Completing a Series of Titrations J-12 



Gas Chromatrography Oxygen Analysis J-13 



Theory of Gas Chromatography J-13 



Setting Up the Gas Chromatographic Equipment J-13 



How the System Works J-16 



Analyzing Oxygen Samples J-17 



Calculating the Oxygen and Nitrogen Counts J-19 



Determining the Gas Chromatography Calibration Factor J-19 



Calculations of Oxygen and Nitrogen J-21 



Maintenance of Gas Chromatography Equipment J-21 



K. PHOSPHATE, SILICATE, pH, AND ALKALINITY DETERMINATION OF SEA 



WATER SAMPLES (In Preparation) 



Change 1—1970 vii 



