abstract |
(57) [Summary] [Structure] A specific binding substance labeled with an ultrafine inorganic fluorescent substance having a particle size of 1 nm to 100 nm. The composition of the ultrafine inorganic phosphor is Ln 2 O 3 : Re, Ln 2 O 2 S: Re, Zn. O, CaWO 4 , MO.xAl 2 O 3 : Eu, Zn 2 S iO 4 : Mn or LaPO 4 : Ce, Tb, and L n is at least one of La, Gd, Lu or Y, Re Is at least one of the lanthanide group elements, M is at least one of the alkaline earth metals, and x is 0.5 to It is 1.5. This ultrafine inorganic phosphor is prepared by a gas evaporation method including a high frequency plasma method, a sputtering method, a glass crystallization method, a sol-gel method, a precipitation method including a hydrothermal synthesis method, or a spray method. [Effect] It can be quantitatively measured, has little deterioration under irradiation with electron beams, ultraviolet rays, etc., and has sufficient luminous efficiency. Further, the substance to be measured can be detected with a resolution of 1 μm or less, and a plurality of different substances to be measured can be simultaneously detected. |