| 浊点萃取分光光度法测定水样中的痕量锌(Ⅱ) |
| |
| 引用本文： | 黄晖,杨大雨.浊点萃取分光光度法测定水样中的痕量锌(Ⅱ)[J].广东微量元素科学,2008,15(6). |
| |
| 作者姓名： | 黄晖 杨大雨 |
| |
| 作者单位： | 三明学院化学与生物工程系,福建,三明,365004;三明学院化学与生物工程系,福建,三明,365004 |
| |
| 基金项目： | 福建省教育厅科研项目
,
三明学院校科研和教改项目 |
| |
| 摘 要： | 为建立浊点萃取预富集测定水样中痕量锌的新方法,在表面活性剂TritonX-114存在下,利用5-Br-PADAP与锌(Ⅱ)产生显色反应的性能,采用分光光度法测定了水样中的痕量锌。结果表明,在pH8.5的NH3-NH4Cl缓冲体系中,锌(Ⅱ)与5-Br-PADAP形成紫红配合物,其最大吸收波长为λ=555 nm,摩尔吸光系数为ε=1.284×105L.mol-1.cm-1,检测限为0.003 7μg.mL-1.锌含量在0~1.2μg.mL-1范围内服从比尔定律。该法有较好的选择性,具有低毒、高效、安全、简便等特点,直接用于水样中痕量锌的测定,结果满意,重复6次测定相对标准偏差为2.18%。
|
| 关 键 词： | 锌 5-Br-PADAP TritonX-114 分光光度法 浊点萃取 |
Determination of Trace Amount of Zinc in River Water by Spectrophotometry after Cloud Point Extraction |
| |
| HUANG Hui,YANG Dayu.Determination of Trace Amount of Zinc in River Water by Spectrophotometry after Cloud Point Extraction[J].Trace Elements Science,2008,15(6). |
| |
| Authors: | HUANG Hui YANG Dayu |
| |
| Institution: | HUANG Hui; YANG Dayu(The Department of Chemical and Bio-Engineering; Sanming Univertity; Fujian Sanming 365004; China); |
| |
| Abstract: | To study a new method which by spectrophotometry after cloud point extraction preconcentration for the determination of trace amounts of Zn(Ⅱ),at pH 8.5 NH3-NH4Cl buffer solution,the analyte is complexed with 5-Br-PADAP and TritonX-114 is added as a surfactant,the enriched analyte is determined by spectrophotometric methods.The results the maximum wave-length of absorption of complex is 555 nm.The molor absorptivity attained a value of ε=1.284×105 L·mol-1·cm-1.The detection limit was 0.003 7 μg·mL-1.Analyti... |
| |
| Keywords: | Zn 2-(5-bromo-2-pyrilazo)-5-diethylaminophenol TritonX-114 spectrophotomotry cloud point extraction |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
