BY : Martua H.Saragih, S.Si Wall-Wash tests on Chemical Tankers Preparation -Reagent- • Pure Methanol (500 ml/bottle) • Pure Water (DI Water) • 2% Silver Nitrate Solution (500 ml / bottle) • 20% Nitric Acid Solution (500 ml / bottle) • 10 ppm (0.01 mg/ml) Chloride Standard Solution (500 ml / bottle) • 0.02% Potassium Permanganate solution (100 mg in 500 ml of DI Water) – to be stored in a dark bottle in a dark bottle and cool temperature. • Concentrated Hydrochloric Acid (500 ml / bottle) -Instrument- • Funnel x 1 • Plastic Bottles (500 ml x 2 bottles for collecting wall wash samples) • Nessler Tube (100 ml x 6 nos.) • Pipette (5 ml x 4 nos. for Nitric Acid / Silver Nitrate/Chloride Solution / KmnO4 • A petridish or Shalle x 2 nos. (for testing Non-volatile matters) • Disposable Vinyl gloves (200 sheets / case) • Disposable Shoe covers • A.P.H.A.Color Standard (No. 3, 5, 8 & 10) for color test. • Black colored plate (for testing...