import { ComputedRef } from 'vue';
export type MolarityUnit = 'pM' | 'nM' | 'µM' | 'mM' | 'M';
export type MassVolumeUnit = 'pg/mL' | 'ng/mL' | 'µg/mL' | 'mg/mL' | 'g/mL';
export type PercentageUnit = '% v/v' | '% w/v' | '% w/w';
export type ConcentrationUnit = MolarityUnit | MassVolumeUnit | PercentageUnit | string;
export interface ConcentrationValue {
    value: number;
    unit: ConcentrationUnit;
}
export interface UnitCategory {
    label: string;
    units: ConcentrationUnit[];
}
export interface UseConcentrationUnitsReturn {
    unitCategories: ComputedRef<UnitCategory[]>;
    molarityUnits: MolarityUnit[];
    massVolumeUnits: MassVolumeUnit[];
    percentageUnits: PercentageUnit[];
    convert: (value: number, from: ConcentrationUnit, to: ConcentrationUnit, mw?: number) => number | null;
    formatWithUnit: (concentration: ConcentrationValue, precision?: number) => string;
    parseConcentration: (input: string) => ConcentrationValue | null;
    getBaseUnit: (unit: ConcentrationUnit) => ConcentrationUnit;
    getConversionHint: (concentration: ConcentrationValue) => string | null;
    isMolarity: (unit: ConcentrationUnit) => boolean;
    isMassVolume: (unit: ConcentrationUnit) => boolean;
    isPercentage: (unit: ConcentrationUnit) => boolean;
}
/** Converts between molarity, mass/volume, and percentage concentration units with formatting helpers. */
export declare function useConcentrationUnits(): UseConcentrationUnitsReturn;