import type { PhInput, PhResult } from './types.js';
/**
 * Calculate pH for buffer solutions using Henderson-Hasselbalch equation.
 *
 * pH = pKa + log10([A-]/[HA])
 *
 * Also calculates buffer capacity and effective range.
 *
 * @param input - pH calculation input with buffer system and concentrations
 * @returns pH result with pKa, buffer capacity, and effective range
 */
export declare function ph(input: PhInput): PhResult;
/**
 * Round to specified decimal places
 */
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