Concordant titres
The expression "concordant titers" refers to the volume of two or more titres that are similar in quantity (less than a 0.10 mL difference between each other).
We record the titration results in the table like this:
| Rough | 1 | 2 | 3 | 4 | |
|---|---|---|---|---|---|
| final burette reading (mL) | 27.50 | 23.35 | 25.70 | 21.95 | 25.2 |
| initial burette reading (mL) | 3.20 | 1.30 | 2.65 | 0.00 | 3.20 |
| titre | 24.3 | 22.05 | 23.05 | 21.95 | 22.00 |
We can ignore the rough titration result. The results of titration 1,3, and 4 are concordant. Titration 2 is too high. We can calculate the mean titer for titration 1, 3 and 4, and ignore the titration 2.
Mean titre = (22.05+21.95+22.00)/3 = 22.00 mL
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