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Дата последнего поиска статьи во внешних источниках: 28 января 2015 г.
Аннотация:Separation and preconcentration of components is a step of chemical analysis used to improve the sensitivity and selectivity of the determination. An important characteristic of a method or a preconcentration procedure is the concentration factor (Kconc), which,
according to its definition, is equal to the ratio of substance concentrations in the concentrate and the initial solution. The value of Kconc is calculated using the
values of concentrations expressed, as a rule, in weight percents (μg/mL, etc.) or mass fractions (%, ppm, and so on).