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Wikipedia

Titer

A titer is a way of expressing concentration. Titer testing employs serial dilution to obtain approximate quantitative information from an analytical procedure that inherently only evaluates as positive or negative. The titer corresponds to the highest dilution factor that still yields a positive reading. For example, positive readings in the first 8 serial twofold dilutions translate into a titer of 1:256 (i.e., 2). Titers are sometimes expressed by the denominator only, for example 1:256 is written 256.

The term has also two other, conflicting meanings. In titration, the titer is the ratio of actual to nominal concentration of a titrant, e.g. a titer of 0.5 would require 1/0.5 = 2 times more titrant than nominal. This is to compensate for possible degradation of the titrant solution. Second, in textile engineering, titer is a synonym for linear density.

Wiktionary

titer

n. (context analytical chemistry English) The concentration of a substance as determined by titration. vb. To measure a concentration, especially by means of titration

WordNet

titer

n. the concentration of a solution as determined by titration [syn: titre]

Usage examples of "titer".

The titers indicate that this particular ink is similar but not identical to the ink on the other documents.

Dicken saw that he had isolated a recombined variety of unencapsulated RNA virus from the blood and sputum of all the afflicted children, in titers sufficient to suggest massive infection.

Dicken saw that he had isolated a recombined variety of unencapsulated RNA virus from the blood and sputum of all the afflicted children, in titers sufficient to suggest massive infection.