SPECTROPHOTOMETRIC METHOD FOR THE DETERMINATION OF VANADIUM IN URANIUM RICH HYDROGEOCHEMICAL SAMPLES USING PYRIDYL AZO RESORCINOL (PAR)
SPECTROPHOTOMETRIC METHOD FOR THE DETERMINATION OF VANADIUM IN URANIUM RICH HYDROGEOCHEMICAL SAMPLES USING PYRIDYL AZO RESORCINOL (PAR)
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DOI：
10.1016/0039-9140(93)80014-i
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发表时间：
1993-04-01
期刊：
影响因子：
6.1
通讯作者：
RANGASWAMY, R
中科院分区：
文献类型：
--
作者：
CHAKRAPANI, G;MURTY, DSR;RANGASWAMY, R
本文研究了用4-（2-吡啶偶氮）间苯二酚测定天然水样中痕量钒（V）的方法。CDTA-焦磷酸缓冲液已被用于掩蔽干扰物，包括铀，否则干扰超过125 ppb。在缓冲液的存在下，钒与PAR的反应需要45分钟的等待时间。该方法的Sandell灵敏度为0.003 μ g/ml，在545 nm处，最佳pH为6.5 +/- 0.2。在钒（V）的100 pp B水平下，该方法的精密度为+/- 15%。该方法已成功地应用于水文地球化学勘查中的一些天然水样。
A simple and precise method has been developed for the determination of traces of vanadium(V), using 4-(2 pyridyl azo) resorcinol, in natural water samples, containing very high concentrations of uranium. CDTA-pyrophosphate buffer has been used for masking interferants, including uranium which otherwise interferes above 125 ppb. The reaction of vanadium with PAR in the presence of buffer requires a waiting period of 45 min. The Sandell sensitivity of the method is 0.003 mug/ml, at 545 nm at an optimum pH of 6.5 +/- 0.2. The precision of the method is +/- 15% at the 100 pp b level of vanadium(V). The method has been successfully applied to a number of natural water samples during hydrogeochemical exploration.