K比例H点标准加入吸光光度法同时测定矿样中铌和钽

陶慧林; 朱仕毅; 郑省政

K比例H点标准加入吸光光度法同时测定矿样中铌和钽

1.
桂林理工大学化学与生物工程学院, 广西桂林 541004
2.
桂林理工大学化学与生物工程学院, 广西桂林 541004
3.
桂林理工大学化学与生物工程学院, 广西桂林 541004

基金项目:

广西壮族自治区教育厅科研基金项目资助(200708LX339)

计量
- 文章访问数: 3635
- HTML全文浏览量: 0
- PDF下载量: 1194
出版历程
- 收稿日期: 2009-11-23
- 修回日期: 2010-03-04

Simultaneous Determination of Niobium and Tantalum in Ore Samples by K-ratio H-point Standard Addition Spectrophotometry

1.
College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
2.
College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
3.
College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China

摘要

摘要: 在盐酸介质中,水杨基荧光酮-氯化十六烷基吡啶体系虽然能分别和铌、钽发生灵敏的络合反应,但所形成的三元胶束络合物的光谱严重重叠,一不适合同时测定铌和钽。文章采用K比例H点标准加入分光光度法,结合Origin 7.5软件,选择最佳波长对,探讨了在不经化学分离的情况下,同时测定矿样中铌和钽的方法。结果表明,K比例H点标准加入法很好地解决了铌和钽的光谱干扰问题,得到了待测物的浓度,还对干扰物质的浓度进行估算。在最佳试验条件下,铌和钽的线性范围分别为(0.4~5.8)×10^-5 g/L、(0.4~11.2)×10^-5 g/L,方法检出限分别为0.28 μg/L、0.22 μg/L,测定精密度分别为0.54%~0.88%、0.88~1.52%。方法用于样品中铌和钽的同时测定,测定值与参考值相符。
- K比例H点标准加入法 /
- 分光光度法 /
- 铌 /
- 钽 /
- 同时测定
Abstract: In chloride acid medium salicyl fluorone-cetyl pyridinium could react with niobium (Nb) and tantalum (Ta) respectively to form ternary micelle complexes, but the complexes exhibit serious spectrum overlap and are not used for spectrophotometric determination of Nb and Ta. In this paper, a new method for simultaneous determination of Nb and Ta in ore samples by K-ratio H-point standard addition spectrophotometry (HPSA) without chemical separation was reported. The optimum wavelength pairs were selected by home-made procedure in Origin 7.5 software. The spectrum interference on determination of Nb and Ta could be eliminated using K-ratio HPSA method. Under the optimum conditions, the linear ranges of determination for Nb and Ta were (0.4~5.8)×10^-5g/L and (0.4~11.2)×10^-5g/L with a detected limit of 0.28 μg/L and 0.22 μg/L respectively. The determination precision were 0.54%~0.88% RSD for Nb and 0.88%~1.52% RSD for Ta. The method has been applied to the simultaneous determination of Nb and Ta in ore samples with satisfactory results.
- K-ratio /
- H-point /
- standard /
- addition /
- method

HTML全文

参考文献(12)

第五春荣,柳小明,袁洪林,林慈銮,王建其. 193nm ArF准分子激光剥蚀等离子体质谱法测定熔融玻璃中微量铌和钽[J].岩矿测试,2007,26(1):1-3.

任卿,张锦柱.Nb、Ta的溶剂萃取及分光显色剂的研究进展[J].稀有金属与硬质合金, 2006,34(4):50-54.

倪永年,黄国平.双波长分光光度法同时测定铌和钽[J].高等学校化学学报, 1989,10(1):106-108.

朱玉伦,李淑玲.二阶导数荧光光度法同时测定岩矿中铌和钽[J].岩矿测试, 1991,10(3):161-165.

刘卫,栾亚兰,仵丽萍.电感耦合等离子体光谱法测定锂辉石选矿产品中铌和钽[J].理化检验:化学分册,2006,42(9):715-716.

刘名扬,李俊锋,王红霞,王洪艳.Kalman滤波-流动注射化学发光法同时测定痕量铌和钽的研究[J]. 高等学校化学学报,2005,26(8):1440-1442.

倪永年.化学计量学在分析化学中的应用[M].北京:科学出版社,2004.

刘树深.H点标准加入法及其应用研究[J].冶金分析,1994,14(1):44-46.

Masoumeh H, Alireza R, Hamid A. Kinetic spectro-photometric determination of Fe(Ⅱ) in the presence of Fe(Ⅲ) by H-point standard addition method in mixed micellar medium[J].Spectrochimica Acta Part A,2007,68(3):414-419.

单瑞峰,张淑芳,孙小银.K比例H点标准加入光度法同时测定铝和铜[J].化学工程师,2008, 151(4):20-22.

孙静月,赵中一,秦孙巍.K比例H点标准加入法同时测定锌与镉[J].江汉大学学报:自然科学版, 2004,32(3):30-32.

刘国民,赵杉林,王黎. K比例H点标准加入法计算研究[J].分析化学,1998,26(9):1078-1080.

施引文献

资源附件(0)

计量

文章访问数: 3635
HTML全文浏览量: 0
PDF下载量: 1194
被引次数: 0

K比例H点标准加入吸光光度法同时测定矿样中铌和钽

计量

出版历程

Simultaneous Determination of Niobium and Tantalum in Ore Samples by K-ratio H-point Standard Addition Spectrophotometry

计量

出版历程

目录