PURPOSE: To enable the realization of a composition suitable for emission analysis highly stable with high emission performance by arranging a composition composing a three-dimensional structure hydrophilic compound having a void inside and a chemical luminescence intensifier as selected from luminol, isoluminol and a derivative thereof.

CONSTITUTION: A hydrophilic compound 2 has a proper void 1 inside a three- dimensional structure and encloses other compounds therein. α, β or γcyclodexitrine, 18-crown-6,15-crown-5, paracyclophane and the like are utilized preferably. A chemical luminescence intensifier is provided to enhance the quantity of light in an emission reaction of luminol, isoluminol and a derivative thereof. 2-hydroxy-9-fluorenone, 2-phenyl-6-hydroxybenzoxazol. N,N,N',N'- tetramethylbenzine and the like are utilized preferably. A composition can be produced by mixing the hydrophilic compound and the chemical luminescence intensifier in water and heating the mixture as required.