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Updated: Jun 28, 2026
Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area
Published on: February 19, 2018
Rapid and selective method for the spectrophotometric determination of nickel naphthenate in gasoline in a
1Department of Applied Chemistry, Shandong Institute of Building Materials, Jinan 250022, People's Republic of China.
Abstract:
A new method for the spectrophotometric determination of nickel naphthenate in gasoline in a microemulsion was developed. PAN reacts with nickel(II) forming a red complex with composition 1:2 (metal to ligand) nickel(II)-PAN and absorption maximum at 568 nm. Nickel naphthenate in gasoline can be determined with PAN in a microemulsion, in the pH range 3.0 approximately 10.0 with a molar absorptivity of 4.8x10(4) l mol(-1) cm(-1). Beer's law was obeyed up to 0.8 mg l(-1) of nickel(II) in the microemulsion system. The interference of Cu(2+), Fe(3+), Mn(2+), Pb(2+) and Zn(2+) can be eliminated by adding 0.5 ml of a mixed masking agent. The method is rapid, simple and highly selective.
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