| 摘要 |
PURPOSE:To enhance sensitivity and indication capacity, by dissolving or dispersing a reagent composition, which consists of a pH indicator, a quaternary ammonium or amine salt, a binder and a water absorbable powder, in a solvent. CONSTITUTION:A reagent composition is formed of a pH indicator, a guaternary ammonium or amine salt such as alkyltrimethyl-ammonium, a binder consisting of a water soluble high-molecular compound for stabilizing color formation and a water insoluble high-molecular compound for preventing the elution of the formed color, and a water absorbable powder and dissolved or dispersed in a solvent such as aromatic hydrocarbon to constitute a pH measuring ink composition. This composition is used in a state applied to a support such as paper. |
