concentration scale

concentration scale

[‚kän·sən′trā·shən ‚skāl]
(chemistry)
Any of several numerical systems defining the quantitative relation of the components of a mixture; for solutions, concentration is expressed as the mass, volume, or number of moles of solute present in proportion to the amount of solvent or total solution.
References in periodicals archive ?
The aim of the single-chemical exposures was to produce the data necessary to predict the median effect concentration of the mixture without exceeding a given level of statistical uncertainty (the 95% confidence limits for the predicted E[C.sub.50] were set at a maximum of [+ or -] 0.2 on the [log.sub.10]-transformed concentration scale).
As random effect, a shift parameter was included in the nonlinear regression model, which accounts for a shift of the whole curve based on the [log.sub.10]-transformed concentration scale. Furthermore, a best-fit approach was adopted: three different regression models (probit, logit, and Weibull) were fitted independently to the same pooled data set, and the best fit was selected on the basis of statistical criteria (Scholze et al.
(b) Limits determined with samples previously diluted to obtain a large concentration scale.
The concentration scale is directly proportional to the total carat weight of diamonds in a cubic inch of matrix where 100 equals 72 carats per cubic inch.
To translate the results to actual concentrations, rather than simply presenting the results in the log-transformed scale, we back-transformed these values to give corresponding intervals in the original concentration scale (nanograms per milliliter).

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