pitoisuusiin

Pitoisuusiin is the illative plural form of the Finnish noun pitoisuus, which means concentration. In Finnish grammar, illoitive plural forms are used to express direction toward multiple concentrations, so pitoisuuksiin translates roughly as “to the concentrations.” The correct standard spelling for this illative plural is pitoisuuksiin; pitoisuusiin is commonly seen as a misspelling or a nonstandard variant.

Usage in texts is routine rather than semantic. Pitoisuus refers to the amount of a substance in a given volume or mass, and the illative plural pitoisuuksiin appears in sentences that discuss movement toward or focus on several concentration levels (for example, in comparative studies or analyses of concentration-dependent effects). Examples include phrases like pitoisuuksiin liittyvät mittausmenetelmät or pitoisuuksiin vaikuttavat tekijät.

Grammatical note: pitoisuus is the base noun, and the illative plural suffix -iin is attached to the plural stem to form pitoisuuksiin. This contrasts with the singular illative pitoisuuteen (to the concentration). For readers and writers, it is important to adhere to standard spelling pitoisuuksiin in formal Finnish.

Related concepts include pitoisuus (concentration) and pitoisuusmittaus (concentration measurement). The term does not designate a separate field; it is a grammatical form used in discussions about multiple concentrations.