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| 浊点萃取-紫外可见光谱法测定痕量钴 | |
| 引用本文： | 仓金顺,武少波,朱霞石,刘德驹.浊点萃取-紫外可见光谱法测定痕量钴[J].化学世界,2009,50(4). |
| 作者姓名： | 仓金顺 武少波 朱霞石 刘德驹 |
| 作者单位： | 1. 扬州大学化学化工学院,江苏,扬州,225002;盐城纺织职业技术学院化工系,江苏,盐城,224005 2. 扬州大学化学化工学院,江苏,扬州,225002 3. 盐城纺织职业技术学院化工系,江苏,盐城,224005 |
| 摘 要： | 研究了浊点萃取(CPE)-紫外可见光谱法(UV/Vis)测定微量钴的新方法,利用表面活性剂聚乙二醇辛基苯基醚(TritonX-100)和配合剂2(5-溴-2-吡啶)-偶氮]-5-(二乙氨基)苯酚(5Br-PADAP)对试样中的钴(Ⅱ)进行浊点萃取。探讨了影响浊点萃取及测定灵敏度的因素。在最佳条件下,钴的富集倍率为5,检出限为1.18ng/mL(n=11),RSD为2.8%(n=5,c(Co2+)=0.20μg/mL),钴含量在(0.01～0.5)μg/mL范围内服从比尔定律。本法对实际样品中的钴进行富集和测定,结果令人满意。 |
| 关 键 词： | 钴 浊点萃取 紫外可见光谱法 |
Determination of Trace Cobalt in Samples by UV-Vis after Cloud Point Extraction |
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| CANG Jin-shun,WU Shao-bo,ZHU Xia-shi,LIU De-ju.Determination of Trace Cobalt in Samples by UV-Vis after Cloud Point Extraction[J].Chemical World,2009,50(4). | |
| Authors: | CANG Jin-shun WU Shao-bo ZHU Xia-shi LIU De-ju |
| Affiliation: | 1.College of Chemistry & Chemical Engineering;Yangzhou University;Jiangsu Yangzhou 225002;China;2.Department of Chemical Engineering;Yancheng College Textile Technology;Jiangsu Yancheng 224005;China |
| Abstract: | A new method based on cloud point extraction(CPE)coupled with UV-Vis for separation/preconcentration of trace cobalt in soybean samples was proposed.Cobalt was complexed with 5Br-PADAP in an acidic medium using Triton X-100 as surfactant and quantitatively extracted into a small volume of the surfactant-rich phase after centrifugation.The chemical variables affecting CPE were investigated and optimized.Under the optimum conditions,the limit of detection for cobalt was 1.18 ng/mL(n=11)with an enhancement fac... |
| Keywords: | cobalt CPE UV-Vis |
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