CAJ | 학술논문

采用自制固相萃取材料PTFE-g-GMA-PEI纤维填充微柱预富集和流动注射(FI) 与电感耦合等离子发射光谱仪联用, 测定样品中痕量Pb2+和Cd2+.对Pb2+和Cd2+的富集与洗脱条件进行优化,并给出相应离子的分析特性.结果表明: 本方法Pb2+和Cd2+检出限分别为3.5和0.15 μg/L; 富集倍数分别为30和80; RSD分别为1.5%和0.6%(n=9,单个离子浓度为50 μg/L).本方法应用于几种中成药中的痕量铅和镉的同时测定,样品加标回收率在90%～108% 之间, 结果满意.
채용자제고상췌취재료PTFE-g-GMA-PEI섬유전충미주예부집화류동주사(FI) 여전감우합등리자발사광보의련용, 측정양품중흔량Pb2+화Cd2+.대Pb2+화Cd2+적부집여세탈조건진행우화,병급출상응리자적분석특성.결과표명: 본방법Pb2+화Cd2+검출한분별위3.5화0.15 μg/L; 부집배수분별위30화80; RSD분별위1.5%화0.6%(n=9,단개리자농도위50 μg/L).본방법응용우궤충중성약중적흔량연화력적동시측정,양품가표회수솔재90%～108% 지간, 결과만의.
Using a micro-column packed with polyethylenimine aminated glycidyl methacrylatE-grafted-polytetrafluoroethylene fiber made by ourselves as the adsorption material, the adsorption behaviors of Pb and Cd under different conditions were studied by inductively coupled plasma optical emission spectrometry. The conditions for the preconcentration of Pb and Cd such as pH, flow-rate, time and eluent acidity were optimized. The results show that the PTFE-g-GMA-PEI Fiber has excellent adsorption property and high adsorption capacity for Pb2+ and Cd2+. The Enrichment factors for Pb2+ and Cd2+ were 30 and 80, respectively and the detection limits were 3.5 μg/L and 0.15 μg/L, respectively, the relative standard derivations were 1.5% and 0.6%(n=9)respectively. When the single ion concentration was 50 μg/L, the sampling frequency was 9 and 18 times/h, respectively. The method was applied to the simultaneous determination of trace lead and cadmium of several Chinese traditional medicine samples, the standard recovery of samples was 90%-108%.