Chlorine Residual

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Ana-Lab Corp.
P.O. Box 9000 2600 Dudley Road Kilgore, TX 75663
Employee Training
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Presents
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Field pH

• By
• Roy White

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Field pH

• Read and follow SOP reference materials
• Follow safety plan
• Collect representative aliquot
• Protect integrity of sample
• Record results and conditions
• Complete Chain of Custody

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Each Participant shall be able to

• Turn ph meter on
• Calibrate meter
• Prepare sample
• Measure pH
• Read temperature
• Record data

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VWR SP20 pH Meter
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VWR SP20 pH Meter
1. Switch unit on using power switch
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VWR SP20 pH Meter

• Meter Calibration
• 1. Determine preliminary pH of sample to decide
  which buffers to use for two point calibration.
• If pH lt 7.00 select 7.00 4.00
• or
• If pH gt 7.00 select 7.00 10.00

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VWR SP20 pH Meter

• Calibrate meter in a contamination free
  environment. Avoid direct sunlight, rain, and
  blowing dust.
• Remove electrode from storage solution
• Rinse with distilled water and blot
• Place electrode in the 7.00 buffer

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VWR SP20 pH Meter

• When ready appears in display, Press OK
• P2 will appear in display

OK
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VWR SP20 pH Meter

• Remove electrode from buffer 7.00
• Rinse with distilled water and blot
• Place electrode in second buffer (determined in
  step 1)
• When ready appears in display, Press OK

OK
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VWR SP20 pH Meter

• P3 will be displayed in display
• Press mode to complete two point calibration

ooo mode
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VWR SP20 pH Meter

• 16.Select buffer 6.00 or 8.00 to use as a
• Check Standard (PreCS - should be between
  the calibration buffers)
• 17. Read and record (within /- 0.05)
• 18.Read and record buffer 7.00 (within
• /- 0.05)

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VWR SP20 pH Meter

• 19. Read and record second buffer (within 0.05)
• 20. When all three buffers read to within 0.05 of
  their value, calibration is complete
• 21. Meter can be used to measure pH
• 22. Check Record mid-point after each measure
  (Post CS)

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VWR SP20 pH Meter

• Record Calibration
• pHlt7.00
• pH /7.00 /4.00 PreCS
  /6.00 PostCS /6.00
• pHgt7.00
• pH /7.00 /10.00 PreCS
  /8.00 PostCS /8.00

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VWR SP20 pH Meter

• Record Calibration
• pHlt7.00
• pH 7.01 /7.00 4.02 /4.00 PreCS
  5.95 /6.00 PostCS 5.97 /6.00
• pHgt7.00
• pH 7.01 /7.00 10.02 /10.00 PreCS 8.03
  /8.00 PostCS 8.01 /8.00

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VWR SP20 pH Meter

• Measuring pH

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VWR SP20 pH Meter

• Collect sample
• Analyze sample within 15 minutes of collection
• Rinse the electrode with distilled water and blot
• Pour sample in container to a depth that covers
  sensing elements of the electrode
• Place the electrode in sample and stir gently

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VWR SP20 pH Meter

• Allow meter to stabilize ( ready )
• Read pH
• Record pH to nearest tenth (0.1)
• Record temperature to nearest degree
• Rinse electrode and return to storage bottle

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VWR SP20 pH Meter

• Record pH to nearest 0.1 SU
• Record temperature to nearest degree
• Record Name, Date Times
• pH (On Site) Collected by Roy
  White Date 3/3/03 Time 0912
• Results____8.3____Temp __28__C Analyzed by Roy
  White Date 3/3/03 Time 0917
• Duplicate ______ Temp _______C

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VWR SP20 pH Meter
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VWR SP20 pH Meter
Questions?
Questions?
Questions?
Questions?
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VWR SP20 pH Meter
Let's Roll