Feng X, Ryan D E
Int J Environ Anal Chem. 1985;19(4):273-80. doi: 10.1080/03067318508077038.
Mercury in water samples, at levels below parts per billion, was collected by dithizone flotation. The statistical detection limit of Hg in seawater was 4 times better than that with a hydrous iron oxide--APDC flotation system in neutron activation determination. The same floated dithizone precipitate can be used repeatedly for collection from several volumes of the water sample. The Hg content in seawater was 0.017 micrograms/L. Average recovery from waters containing 0.025 micrograms/L, 0.05 micrograms/L and 0.1 micrograms/L was 98%. The method was applied successfully to the determination of Hg in NBS 1641b. Methyl mercury is also collected by the procedure described.
通过双硫腙浮选法收集水样中含量低于十亿分之一的汞。在中子活化测定中，海水中汞的统计检测限比水合氧化铁 - 吡咯烷二硫代甲酸铵（APDC）浮选系统的检测限要好4倍。同样的浮选双硫腙沉淀物可重复用于从几体积的水样中进行收集。海水中汞的含量为0.017微克/升。在含有0.025微克/升、0.05微克/升和0.1微克/升汞的水样中，平均回收率为98%。该方法成功应用于测定标准参考物质NBS 1641b中的汞。甲基汞也可通过所述程序进行收集。
