Patent ID: 8084214

Claim:
A method of acquiring information of an object in a sample, wherein the object is decomposed by an artificial digestive enzyme, comprising the steps of: treating the sample with a treatment solution by applying the treatment solution to the sample by an ink-jet method, wherein the treatment solution comprises at least a gold particle and the artificial digestive enzyme, the artificial digestive enzyme has a digestive active site and a bonding site with the gold particle, the gold particle and the artificial digestive enzyme are chemically bonded, the gold particle exists in a dispersed state at normal temperature and pressure, and the treatment solution further contains one or more selected from the group consisting of glycerin, urea, thiodiglycol and acetylenic alcohol; and acquiring information on a mass of the object by time of flight secondary ion mass spectrometry, wherein the information on the mass of the object includes information on masses of peptide fragments decomposed by the artificial digestive enzyme.