| 摘要 |
A novel water detection composition for use in place of blue gel and a water detection indicator. The water detection composition comprises, as active components, a porphyrin complex, and at least one inorganic acid salt of a metal selected from a group consisting of alkali metals, alkaline earth metals, Al and Fe. The porphyrin complex is: wherein M is P, X is selected from a group consisting of a halogen and OH, and R2 is phenyl, and the water detection composition is supported by a silica gel.
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