| Date: |
2011-01-27 |
| From: |
Lab - none |
| To: |
Lab - none |
| Title: |
Calibration |
| Notes: |
Jaclyn Hatala calibrated the pH probe on 1/27/11.
1. First I obtained the following buffers from the Barker storeroom: 1-0240 (pH4) and 1-0250 (pH7) to do a 2 point
calibration.
2. Following the instructions for calibration in Appendix A of the manual, I submerged the probe in the
pH 7 buffer solution and measured the mV output using the datalogger program: MBCR23x_TOWERMET_V100.
3. After recording measurements for 10 minutes, I rinsed the probe with deionized water and gently dried it.
4. Next I submerged it in the pH 4 buffer solution and recorded the mV output for 10 minutes.
5. I calculated the slope between the 2 measurements to get the multiplier in pH/mV = -0.0173 pH/mV. |
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