The reaction of phenylarsenazo with chromium(III) |
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| Authors: | Fu-Sheng S |
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| Institution: | Department of Chemistry, China University of Science and Technology, Hefei, Anhui, People's Republic of China. |
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| Abstract: | The conditions for the reaction between phenylarsenazo (PAA) (2-(2-arsonophenyl)azoj-7-(phenylazo)-1, 8-dihydroxynaphthalene-3,6-disulphonic acid) and chromium(III) have been studied. A blue 1:1 complex is formed at pH 2.2 on heating the reactants at 100 degrees for 15 min. It has maximum absorption at 635 nm and is stable for at least 24 hr. The molar absorptivity is 3.3 x 10(4) 1.mole(-1).cm(-1). Beer's law is obeyed in the chromium concentration range 0-1.4 mug ml . The reaction has been successfully applied to determination of chromium in alloy steel. |
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| Keywords: | Present address: Chemical Engineering Department Wuxi Institute of Light Industry Wuxi Jiangsu People's Republic of China |
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