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Water analysis-Determination of Physical parameters
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Procedure:

 

  • Under the physical content, select the tests- pH, turbidity or electrical conductivity.

 

a. Determination of pH of Water Sample

 

  • Calibration of pH meter
  1. Select "Buffer solution 1 (4.0 pH)".
  2. Switch on the pH meter.
  3. pH meter will show the pH reading as 4.0
  4. Change the buffer solution to "Buffer solution 2 (7.0 pH)".
  5. Again switch on the pH meter.
  6. Now pH meter will show 7.0

Your ph meter is calibrated successfully!!!

  1. Select the water samples from the given list.
  2. Switch on the pH meter.
  3. pH meter will show the pH reading of the selected water samples.
  4. Note down the readings.

 

 

 

b. Determination of Turbidity of Water Sample

 

  • Calibration of Nephelometer meter
  1. Select standard solution from the list, i.e, formazin suspension (20 NTU)
  2. Load the sample into Nephelometer.
  3. Meter will show the turbidity reading  as 20 NTU

Your Nephelometer is calibrated successfully!!!

  1. Select the water samples from the given list.
  2. Switch on the Nephelometer.
  3. Note down the turbidity reading from Nephelometer.

 

 

c. Determination of Electrical Conductivity of Water Sample

 

  • Calibration of conductivity meter
  1. Select the standard solution, KCl-0.01 M-1412 µS/cm.
  2. Switch on the conductivity meter.
  3. Conductivity meter will show the conductivity reading as 1412 µS/cm.

Your conductivity meter is calibrated successfully!!!

  1. Select the water samples from the given list.
  2. Switch on the conductivity meter.
  3. Note down the conductivity of samples from conductivity meter.

 

 

Points to Remember while Performing the Experiment in a Real Laboratory:

 

  1. Always wear lab coat and gloves when you are in the lab. When you enter the lab, switch on the exhaust fan and make sure that all the chemicals and reagents required for the experiment are available. If they are not available, prepare the reagents using the components for reagent preparation.
  2. Properly adjust the flame of the Bunsen burner. The proper flame is a small blue cone; it is not a large plume, nor is it orange.
  3. Make sure to clean all your working apparatus with chromic acid and distilled water and ensure that all the apparatus are free from water droplets while performing the experiment.
  4. Make sure to calibrate the electronic weigh balance before taking the measurements.
  5. Clean all glassware with soap and distilled water. Once the experiment is completed, recap the reagent bottles. Switch off the light, exhaust fan and gas cylinder before leaving the lab.
  6. Discard the used gloves in a waste bin.

 

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