Testing Prcedure

• 1). With gloves on, collect water sample in plastic or glass bottle and store it at 4 degrees C for no longer than 24 hours.
  
  
• 2). Pour 50 ml of sample into Erlenmeyer flask and measure pH using the meter.
  
  
• 3). Add six drops of the phenolphthalein indicator. If the color does not change to pink, all alkalinity is bicarbonate and non-carbonate alkalinity is zero. If it does turn pink, go to Step 4.
  
  
• 4). Slowly add the 0.02 N of sulfuric acid from the burret to the flask while simultaneously swirling the flask until the water is colorless and immediately stop adding the acid.
  
  
• 5). Measure the amount of sulfuric acid used from the burret.
  
  
• 6). Multiply the milliliters of sulfuric acid used by 20 to get the mg/l of P alkalinity. This is the amount of non-carbonate hardness present in your sample.
  
  
• 7). Pour tested sample into beaker and dispose of sample in hazardous waste receptacle.