The results will not be accurate if the delivery tube tip is not held in the
solution.
d. Add titrant and swirl the sample until the end point. Record the number of
digits shown in the digital counter window.
Each digit (1/10 turn of the knob) supplies 0.00125 mL of titrant. For most
tests, the solution in the titrant cartridge is made so that digits shown on
the digital counter are the same as the concentration of the sample in
mg/L.
The number of digits until the end point is usually 100 to 400. If the digits
necessary is less than 100 or more than 400, use an alternate sample
volume or titrant cartridge.
8 English
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