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2003•Acta Petrolei Sinica(Petroleum Processing Section)Requires access

DETERMINATION OF TRACE VANADIUM IN CRUDE OIL AND DIESEL OIL BY CATALYTIC SPECTROPHOTOMETRY

Liu Shu

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Abstract

A method of catalytic spectrophotometry for determination of trace vanadium in crude oil and diesel oil is described.The oxidation of calcon caboxylic acid sodium salt (CR) by hydrogen peroxide is a slow process,and vanadium has a catalytic effect on the reaction rate.The reaction was traced spectrophotometrically by measuring the decrease in absorbance at 535?nm.Bear's Law is obeyed in the range of V content from 0 to 16?μg/l.The influence of 15 foreign ions was detected.The method was applied to determine trace vanadium(10～100?ng/g) in crude oil and diesel oil,the maximum relative standard deviation was 5.3 % and the recoveries were 94.6 % and 88.2 %,respectively.

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A method of catalytic spectrophotometry for determination of trace vanadium in crude oil and diesel oil is described.The oxidation of calcon caboxylic acid sodium salt (CR) by hydrogen peroxide is a slow process,and vanadium has a catalytic effect on the reaction rate.The reaction was traced spectrophotometrically by measuring the decrease in absorbance at 535?nm.Bear's Law is obeyed in the range of V content from 0 to 16?μg/l.The influence of 15 foreign ions was detected.The method was applied to determine trace vanadium(10～100?ng/g) in crude oil and diesel oil,the maximum relative standard deviation was 5.3 % and the recoveries were 94.6 % and 88.2 %,respectively.

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Available abstract

A method of catalytic spectrophotometry for determination of trace vanadium in crude oil and diesel oil is described.The oxidation of calcon caboxylic acid sodium salt (CR) by hydrogen peroxide is a slow process,and vanadium has a catalytic effect on the reaction rate.The reaction was traced spectrophotometrically by measuring the decrease in absorbance at 535?nm.Bear's Law is obeyed in the range of V content from 0 to 16?μg/l.The influence of 15 foreign ions was detected.The method was applied to determine trace vanadium(10～100?ng/g) in crude oil and diesel oil,the maximum relative standard deviation was 5.3 % and the recoveries were 94.6 % and 88.2 %,respectively.

Key concepts: Vanadium, Spectrophotometry, Absorbance, Chemistry, Diesel fuel, Catalysis, Hydrogen peroxide, Trace Amounts

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DETERMINATION OF TRACE VANADIUM IN CRUDE OIL AND DIESEL OIL BY CATALYTIC SPECTROPHOTOMETRY — Research Paper | ScholarLens