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On-line microwave FIA technique and its application to determination of rhodium and sequential determination of palladium and rhodium

✍ Scribed by Yanqiao Xiang; Xingguo Chen; Guanbin Li; Zhide Hu; Zhengfeng Zhao; Martin Hooper

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
128 KB
Volume
12
Category
Article
ISSN
0895-7533

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✦ Synopsis

An on-line microwave oven was employed in this study to accelerate the coordination reactions between Rh(III), Pd(II), and 2-(3,5-dicloro-2-pyridyl-azo)-5-dimethylaminoaniline (3,5-diCl-PADMA) in HOAc-NaOAc media. Two sensitive flow-injection spectrophotometric methods have been established for the determination of Rh and sequential determination of Rh and Pd, respectively.

Two important parameters in on-line Microwave-FIA, T 1 and T 2 , were investigated. The difference in the effect of the microwave irradiation on the reactions was explained. The proposed methods are applied to the determination of Rh in the waste and sequential determination of Pd and Rh in artificial samples with satisfactory results.

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## Abstract The determination of noble metals in environmental samples is of increasing importance. Palladium is often employed as a catalyst in chemical industry and is also used with platinum and rhodium in motor car catalytic converters which might cause environmental pollution problems. Two dif