Single-channel flow injection spectrophotometric determination of nickel using furildioxime in micellar solution.
A very simple, selective, and fast flow injection spectrophotometeric method is developed for determination of nickel using furildioxime as complexing agent. Micellar solution of brij-35 is employed to solubilize the sparingly soluble complex of Ni-furildioxime in buffered aqueous system (pH-9.00). Under optimized conditions, absorbance is linear from 0.02 to 10 μg mL(-1) using 500 μL sample volume and from 10 to 30 μg mL(-1) using 50 μL sample volume of nickel at 480 nm, with R(2) = 0.9971 and 0.9916, respectively. The molar absorption coefficient and Sandell's sensitivity were 6.0 × 10(3) L mol(-1) cm(-1) and 0.01 ng cm(-2), respectively. The sample throughput of the method is 120 samples per hour with RSD of 0.01-0.2% for 0.02 to 10 μg mL(-1) nickel (n = 5), indicating that the method is highly precise and reproducible. Interference from cobalt is removed by Nitroso R-salt-modified XAD-16. The developed method is validated by analysing certified reference materials and is applied to assess nickel content of commercially available cigarettes.
NCE in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan. najmamemon@gmail.com
Najma
N
Memon
Saima
S
Memon
Amber R
AR
Solangi
Rubina
R
Soomro
Rabel
R
Soomro
D003035:Cobalt / Q000032:analysis; D008823:Micelles; D009532:Nickel / Q000032:analysis*; D010091:Oximes / Q000737:chemistry*; D013053:Spectrophotometry / Q000379:methods*
D008823:Micelles; D010091:Oximes; C014565:furildioxime; D003035:Cobalt; D009532:Nickel