合成一种室温离子液体1-辛基-3-甲基咪唑六氟磷酸盐([C8mim][PF6]),替代挥发性有机溶剂用于金属离子的液/液萃取.在阳离子表面活性剂CTMAB存在下,钼(Ⅵ)与新合成的试剂5-对甲氧基苯基偶氮水杨基荧光酮(p-MOPASF)反应形成稳定的红色络合物.在显色后的溶液中,加入室温离子液体1-辛基-3-甲基咪唑六氟磷酸盐后,钼络合物被迅速萃入离子液体相.然后,用4.0 mol/L NaOH溶液将钼(Ⅵ)从离子液体相反萃取至水中,此反萃液直接应用于石墨炉原子吸收光谱法测定钼.钼一次萃取率接近100%,富集倍数达100倍以上.室温离子液体萃取-石墨炉原子吸收光谱法成功地应用于环境水样中超痕量钼的测定,平均回收率为95.0%～105.5%.
参考文献
| [1] | Li Zaijun;Pan Jiaomai;Tang Jian .Determination of trace molybdenum in vegetable and food samples by spectrophotometry with p-carboxyphenylfluorone[J].Analytical and bioanalytical chemistry,2002(6):1125-1131. |
| [2] | Li ZaiJun;Yang YuLing;Tang Jian;Pan JiaoMai .9-(2,4-dihydroxyphenyl)-2,3,7-trihydroxyl-6-fluorone as analytical reagent for spectrophotometric determination of molybdenum in plant tissues.[J].Journal of Food Composition and Analysis,2005(6):561-569. |
| [3] | 刘长增,金学勇.铍试剂Ⅲ褪色光度法测定痕量钼的研究[J].冶金分析,2005(02):51-53. |
| [4] | 邢培志,廖磊.端视ICP-OES法测定水中微量硼、钡、铍、钼、钠、镍、锑、锡[J].中国卫生检验杂志,2005(02):177,199. |
| [5] | 程滢.石墨炉原子吸收法直接测定水中钼[J].云南环境科学,2006(z1):178-179. |
| [6] | A.J. Bednar;J.E. Mirecki;L.S. Inouye .The determination of tungsten, molybdenum, and phosphorus oxyanions by high performance liquid chromatography inductively coupled plasma mass spectrometery[J].Talanta: The International Journal of Pure and Applied Analytical Chemistry,2007(5):1828-1832. |
| [7] | Villain K;Karl-Heinz T .Trace characterization of high-purity molybdenum and tungsten by electrothermal atomic absorption spectrometry,inductively coupled plasma atomic emission spectrometry,inductively coupled plasma mass spectrometry and total reflection X-ray fluorescence spectrometry involving analyte-matrix separation[J].Atomic Spectroscopy,1997,52(14):2061-2076. |
| [8] | Agrawal YK;Sharma KR .Speciation, liquid-liquid extraction, sequential separation, preconcentration, transport and ICP-AES determination of Cr(III), Mo(VI) and W(VI) with calix-crown hydroxamic acid in high purity grade materials and environmental samples[J].Talanta: The International Journal of Pure and Applied Analytical Chemistry,2005(1):112-120. |
| [9] | Ghiasvand AR;Shadabi S;Mohagheghzadeh E;Hashemi P .Homogeneous liquid-liquid extraction method for the selective separation and preconcentration of ultra trace molybdenum[J].Talanta: The International Journal of Pure and Applied Analytical Chemistry,2005(4):912-916. |
| [10] | Liu Yansheng,Zhang Zhongxin,Zhang Guofu,Liu Zhichang,Hu Yufeng,Shi Quan,Ji Dejun.Effect of the Structure of Cations and Anions of Ionic Liquids on Separation of Aromatics from Hydrocarbon Mixtures[J].石油科学（英文版）,2006(03):73-78. |
| [11] | Matthew H;Agust(i)n G;Francisco M .Catalytic epoxidation of cyclooctene using molybdenum(Ⅵ) compounds and urea-hydrogen peroxide in the ionic liquid[bmim]FF6[J].Catalysis Communications,2007,8(07):987-990. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%