CAJ | 학술논문

本文提出了浊点萃取-流动注射电感耦合等离子体原子发射光谱(FI-ICP-AES)法同时测定水中镉、钴、铜、镍、锌的新方法.利用5-Br-PADAP将待测金属离子转化为水不溶性的螯合物,并萃取到表面活性剂Triton X-114的浓缩相,以乙醇-硝酸溶液稀释含富集离子的浓缩相,并以FI-ICP-AES法测定.考察了流动注射进样体积、积分时间、萃取体系介质酸度、螯合剂和表面活性剂用量等实验条件的影响.在折衷条件下,镉、钴、铜、镍和锌的浓缩倍率可达18、10、16、10和8,检出限分别为0.7 μg/L、1.6 μg/L、1.3 μg/L、5.7 μg/L、3.2 μg/L.方法成功应用于自来水、河水和海水中痕量镉、钴、铜、镍和锌的分析.在0.02 mg/L 和0.10 mg/L二个水平进行加入回收试验,回收率在80%与118%之间.
본문제출료탁점췌취-류동주사전감우합등리자체원자발사광보(FI-ICP-AES)법동시측정수중력、고、동、얼、자적신방법.이용5-Br-PADAP장대측금속리자전화위수불용성적오합물,병췌취도표면활성제Triton X-114적농축상,이을순-초산용액희석함부집리자적농축상,병이FI-ICP-AES법측정.고찰료류동주사진양체적、적분시간、췌취체계개질산도、오합제화표면활성제용량등실험조건적영향.재절충조건하,력、고、동、얼화자적농축배솔가체18、10、16、10화8,검출한분별위0.7 μg/L、1.6 μg/L、1.3 μg/L、5.7 μg/L、3.2 μg/L.방법성공응용우자래수、하수화해수중흔량력、고、동、얼화자적분석.재0.02 mg/L 화0.10 mg/L이개수평진행가입회수시험,회수솔재80%여118%지간.
A cloud point extraction procedure was developed for pre-concentration of trace amount of Cd2+, Co2+,Cu2+, Ni2+ and Zn2+ in water samples prior to inductively coupled plasma atomic emission spectrometric determination. 5-Br-PADAP was used to transform the metal ions into water in-soluble chelates, and the chelates were extracted into a surfactant-rich phase of Triton X-114. After being diluted with ethanol-nitric acid solution, the surfactant-rich phase containing the concentrated metal ions was introduced into the ICP with flow injection technique. Various experimental conditions such as sampling volume, integration time, extraction acidity and concentrations of 5-Br-PADAP and Triton X-114 were examined. Under the optimized conditions, enhancement factors of 18, 10, 16, 10, 8 and detection limits of 0.7, 1.6, 1.3, 5.7, and 3.2 g/L were obtained for Cd2+, Co2+,Cu2+, Ni2+ and Zn2+, respectively. The developed method was successfully applied to the determination of Cd2+, Co2+,Cu2+, Ni2+ and Zn2+ in tap water, river water and sea water samples. Recoveries for the spiked samples were in the range of 80% and 118%.