摘要
本文介绍了一种测定海水中微量苯胺的气相色谱法。取5L天然海水,用KOH调节水样的pH=9,将溶液转移至贮液器中,在减压下,以10—20ml/min流速全部通过已净化的GDX-502吸附柱,尽可能除去柱中残留水分,将8—10ml二氯甲烷洗脱剂注入柱内浸泡数分钟,打开活塞以3—5ml/min的流速接收洗脱液,将洗脱液转移至K.D.浓缩器中,浓缩至1ml,定容。用少许无水硫酸钠干燥脱水后,即可取样进行色谱测定,其最低检出浓度可达2μg/l。
In this paper, a rapid and precise determination of aniline in seawater by gas chromato-graphy is reported. The aniline in seawater can be isolated by absorption on a small column of GDX-502 resin. The organics are readily eluted by CH2CI2; the eluate is then concentrated by K. D. concentrator, and the organics are separated and determined by gas chromatography. The influences of several parameters, including eluting agent quantity, pH, flow rate, and different concentrations of aniline etc. upon recoveries of the resin were studied. Studies on a large number of model compounds added to water in 2-20μg/L range demonstrated that this method is accurate and reliable. The recovery of aniline in some water samples was found to be 98.6-100.2%.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1992年第1期49-55,共7页
Oceanologia Et Limnologia Sinica
