New Spectrophotometric Method for the Determination of Titanium in Soil and Standard Geochemical Samples
作者:
Bo Zhu,
Xiaomei Luo,
Shaopu Liu,
期刊:
Analytical Letters
(Taylor Available online 1997)
卷期:
Volume 30,
issue 5
页码: 963-972
ISSN:0003-2719
年代: 1997
DOI:10.1080/00032719708002310
出版商: Taylor & Francis Group
关键词: Titanium;Spectrophotometry;6-(4-nitrophenylazo)-3,4,5-trihydroxy benzoic acid
数据来源: Taylor
摘要:
In the present communication a simple and rapid spectrophotometric method for the determination of titanium is described. The method is based on the reaction of Ti(IV) with a newly synthesized reagent, 6-(4-nitrophenylazo)-3,4,5-trihydroxy benzoic acid (NATHB), in ethanol medium at pH 3.2 to 4.2. The complex exhibits an absorption maximum at 495 nm and Beer's law is valid over the range of 0.04 – 1.00 μg.ml−1Ti. The molar absorptivity is 3.48 × 104dm3.mole−1. cm−1. Most of the foreign metal ions and anions do not produce any colorations with NATHB at selected conditions. Based on these results, a simple and direct spectrophotometric method with high selectivity and sensitivity was proposed. The method has been successfully applied for the determination of titanium in 5 soil and 3 standard geochemical samples.
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