利用吹扫捕集-气质联用方法测定了2014年5月黄海、渤海所取海水样品中异戊二烯的含量,探讨了其分布特征、海-气通量及影响因素.研究结果表明:春季黄海、渤海海域表层海水中异戊二烯的浓度范围为6.02~32.91pmol/L,(平均值±标准偏差)为(15.39±4.98) pmol/L,在黄海中部海域出现浓度高值;表层海水中异戊二烯与叶绿素a (Chl-a)浓度有一定的正相关性(R2 = 0.2529,n = 49,P < 0.001),说明浮游植物生物量在异戊二烯生产和分布中发挥重要作用;春季黄海、渤海异戊二烯海-气通量的变化范围为0.78~192.43nmol/(m2·d),(平均值±标准偏差)为(24.08±30.11)nmol/(m2·d),表明我国陆架海区是大气异戊二烯重要的源.%Isoprene concentrations were determined by gas chromatography with mass spectrum detector (GC-MSD) coupled with purge-and-trap system to study the spatial distribution as well as sea-to-air flux and influencing factors. The results showed that the concentrations of isoprene ranged from 6.02 to 32.91pmol/L in the surface seawater of the Yellow Sea and the Bohai Sea in spring, with an average of (15.39 ± 4.98) pmol/L. The highest concentration of isoprene was found in central Yellow Sea. A positive correlation was observed between isoprene and Chl-a concentrations (R2 = 0.2529, n = 49, P < 0.001), suggesting that phytoplankton play an important role in the production and distribution of isoprene. 2 The sea-to-air flux ranged from 0.78 to 192.43nmol/(m·d), with a mean value of (24.08 ± 30.11) nmol/(m shows that the shelf seas of China might be an important source of isoprene. 2 ·d). The study
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