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TITRA
TION
9. TITRATION
The instructions listed below should be followed carefully to ensure measurements are conducted with
the highest possible accuracy and precision.
• Ensure the pump and electrode have been calibrated.
• The dosing tip is immersed in the sample (approximately 0.25 cm / 0.1")
• A clean volumetric pipette is used to transfer the sample to the titration beaker.
9.1. SAMPLE PREPARATION
• Use a clean pipette to add exactly 1 mL of sample to a clean beaker.
Note:
Failure to use a clean pipette will result in erroneous readings.
• Fill the beaker up to 50 mL with distilled or deionized water.
9.2. PROCEDURE
• Place the dispensing tip over a waste beaker and press
Start
. The pump will dispense a small
amount of titrant when it resets.
• Place the stir bar in the beaker and put the beaker in the
minititrator top.
• Place the probe holder on the top of the beaker and secure it
by turning clockwise.
• Rinse the pH electrode with deionized water and immerse
into the sample until the reference junction is completely
submerged. Be sure that the tip of the electrode is not hitting
the stir bar.
• Insert the dosing tip into the titrant tube sleeve. It is critical that
the tip be immersed approximately 0.25 cm (0.1") into the
sample being titrated.
• Press
Continue
to begin the titration and
Stop
to abort it.
50 mL
25 mL
15 mL
