Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1, Moscow, 119991, Russia.
Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1, Moscow, 119991, Russia.
Talanta. 2021 Jan 1;221:121485. doi: 10.1016/j.talanta.2020.121485. Epub 2020 Aug 7.
Preconcentration of Cd(II), Co(II), Cu(II), Ni(II), Pb(II), and Zn(II) in aqueous biphasic system tetrabutylammonium bromide (TBAB) - HO - (NH)SO followed by ICP-OES determination is reported for the first time. All metal ions extracted quantitatively with 4-(2-pyridylazo)-resorcinol. Nonwoven polypropylene collector was used to capture the extract and to assist phase separation. The concentrate was eluted with 0.3 mol L nitric acid and introduced directly into ICP-OES sampling line. Detection limits for cadmium, cobalt, copper, nickel, lead, and zinc were 0.012, 0.2, 0.17, 0.11, 0.2, and 0.4 μg L, respectively; preconcentration factor was 150. The method accuracy was verified by the analysis of certified reference materials samples of waste waters and surface water, as well as the real samples of spring and well water. The use of oleophilic polypropylene collector allowed to handle small volume extract, attain high preconcentration factor and significantly decrease detection limits for ICP-OES determination of heavy metals.
首次报道了在两相体系四丁基溴化铵（TBAB）-HO-（NH）SO 中预浓缩 Cd(II)、Co(II)、Cu(II)、Ni(II)、Pb(II)和 Zn(II)，然后用 ICP-OES 测定。所有金属离子均用 4-(2-吡啶偶氮）-间苯二酚定量萃取。采用无纺聚丙烯收集器来捕获萃取物并辅助相分离。浓缩物用 0.3 mol L 硝酸洗脱，并直接引入 ICP-OES 进样线。镉、钴、铜、镍、铅和锌的检测限分别为 0.012、0.2、0.17、0.11、0.2 和 0.4 μg L；富集因子为 150。该方法通过对废水和地表水的认证参考物质样品以及泉水和井水的实际样品的分析进行了验证。亲油性聚丙烯收集器的使用允许处理小体积的萃取物，获得高的富集因子，并显著降低 ICP-OES 测定重金属的检测限。
