1996 年 2 巻 2 号 p. 105-110
Routine analytical method of organic carbon and nitrogen in marine sediments were de scribed, and results of the method were compared with those of acid wash-out method. Samples were treated with UCl to remove carbonate within ceramic sample boats, by drop ping UCl using microsyringe, and organic carbon and nitrogen were determined with Yanaco MT-5 CHN analyser. The method were applied to sand of tidal flat, silt of estuary, sediment trap particles and coralline samples. Precision (CV%) were 4-8% for organic carbon and 8-14% for nitrogen. 10 -30% of organic carbon and nitrogen were lost by wash-out acid treatment.