摘要
研究了对磺酸基苯基亚甲基若丹宁(SBDR)与汞的显色反应,在pH4.0的HAc NaAc缓冲介质中,吐温 80存在下,SBDR与汞反应生成2∶1稳定络合物,该络合物可被WatersPorapak Sep Park C18固相萃取小柱萃取,用乙醇洗脱后在乙醇介质中λmax=520nm,可用分光光度法测定,体系ε=1.16×105L/mol·cm。汞含量在0μg/mL～1.5μg/mL内符合比尔定律,方法可用于水样中汞含量的测定。
<Abstrcat>The color reaction of mercury(Ⅱ) with p-sulfobenzylidenerhodanine(SBDR) was studied. In the pH 4.0 HAcNaAc buffer solution with presence of Tween80 medium. SBDR could react with mercury(Ⅱ) to form a stable 2∶1 complex. This complex could be extracted by Waters SepParkC18 cartridge and eluted by ethanol. The molar absorptivity was 1.16×105 L/moL·cm at 520 nm. Beer's law was obeyed in range of 0～1.5 μg/mL. This method was applied to the determination of mercury in drinking water with satisfactory results.
出处
《分析试验室》
CAS
CSCD
北大核心
2002年第4期93-95,共3页
Chinese Journal of Analysis Laboratory
