大気中の海洋・植物起源有機物質のGC/MS分析

Naturally derived organics in the atmosphere (isoprene, dimethyl sulfide, and bromocarbons) were analyzed with a combination of adsorptive sampling and capillary GC/MS, where a Poraplot Q column was used to avoid difficulties accompanying cryogenic focus on the capillary column. Their detection limits were 2 pg for bromocarbons, 5~10 pg for isoprene and dimethyl sulfide. Diurnal variations of their concentrations were observed in Iriomote Island in March of 1991.