| 摘要 |
PROBLEM TO BE SOLVED: To obtain egg shell powder without releasing irritating smell, irritating the nostrils and peculiar to egg shell powder and impairing taste even when used for beverage, etc., by preparing egg shell powder and washing and drying he powder. SOLUTION: Egg shell powder having <=50 μm average particle diameter is prepared and washed and dried. Thereby, ingredients eluted before elution of toluene among ingredients released when the water in the same amount as an amount of the egg shell powder is added and mixed with the egg shell powder are reduced in the following gas chromatographic analysis conditions: column: capillary column of fused silica in which a liquid phase comprising dimethylpolysiloxane replacing 5% of methyl group with phenyl group is applied to the inner wall; column size: 30 cm length × 0.25 mm inner diameter; injecting method: thermal desorption cold trap injector method; column temperature: retained at 40 deg.C initial temperature for 6 min and raised up to 10 deg.C at a rate of 5 deg.C/min and retained for 10 min; carrier gas: He; column head pressure: 1.1 kgf/cm<2> ; detector: FID; and detection temperature: 220 deg.C. |
