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Online preconcentration and determination of trace amounts of zinc in nature waters.

Wei L, Zhang X, Dai Y, Huang J, Xie YH, Xiao K - J Autom Methods Manag Chem (2008)

Bottom Line: The optimal experimental conditions, including reaction conditions and preconcentration conditions, had been obtained.The linear range of the proposed method was between 2.0 and 360 mug L(-1) and the detection limit was 0.42 mug L(-1).The relative standard deviation was 3.55% and 2.14% for 5.0 mug L(-1) and 50 mug L(-1) of zinc standard solution (n = 8).

View Article: PubMed Central - PubMed

Affiliation: College of Architecture and Environment, Sichuan University, Chengdu 610065, China.

ABSTRACT
A simple, sensitive, reliable and flexible flow injection spectrophotometric method is proposed for on-line preconcentration and determination of trace amounts of zinc in water. At the presence of Tween-80 in pH 9.3 buffer solutions, the shade of color of Zn (II)-PAN complex is in a linear relation to the zinc amount at the point of the maximum absorption peak of 560 nm. The optimal experimental conditions, including reaction conditions and preconcentration conditions, had been obtained. The linear range of the proposed method was between 2.0 and 360 mug L(-1) and the detection limit was 0.42 mug L(-1). The relative standard deviation was 3.55% and 2.14% for 5.0 mug L(-1) and 50 mug L(-1) of zinc standard solution (n = 8). The method had been successfully applied to zinc determination in water samples and the analytical results were satisfactory.

No MeSH data available.


Schematic diagram of the flowinjection concentration online.
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Related In: Results  -  Collection


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fig1: Schematic diagram of the flowinjection concentration online.

Mentions: The FIA manifold used was outlined in Figure 1 with PTFE pipes. The samplesolution was injected into preconcentration column to preconcentrate with asix-way injection valve. When the instrument was put into analyzing position, the concentrated Zn(II) was eluted by eluent solution, pushed to the three-way cock, and mixedwith chromogenic reagent solution in thereaction coil. The Zn (II)-PAN complex wasthen formed and carried into the flow cell. Theabsorbance intensity of Zn (II)-PAN complex wasdetermined at 560 nm by detector and transformed to a signal of the peak whichwas recorded by HW-2000 software on a PC.


Online preconcentration and determination of trace amounts of zinc in nature waters.

Wei L, Zhang X, Dai Y, Huang J, Xie YH, Xiao K - J Autom Methods Manag Chem (2008)

Schematic diagram of the flowinjection concentration online.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2279163&req=5

fig1: Schematic diagram of the flowinjection concentration online.
Mentions: The FIA manifold used was outlined in Figure 1 with PTFE pipes. The samplesolution was injected into preconcentration column to preconcentrate with asix-way injection valve. When the instrument was put into analyzing position, the concentrated Zn(II) was eluted by eluent solution, pushed to the three-way cock, and mixedwith chromogenic reagent solution in thereaction coil. The Zn (II)-PAN complex wasthen formed and carried into the flow cell. Theabsorbance intensity of Zn (II)-PAN complex wasdetermined at 560 nm by detector and transformed to a signal of the peak whichwas recorded by HW-2000 software on a PC.

Bottom Line: The optimal experimental conditions, including reaction conditions and preconcentration conditions, had been obtained.The linear range of the proposed method was between 2.0 and 360 mug L(-1) and the detection limit was 0.42 mug L(-1).The relative standard deviation was 3.55% and 2.14% for 5.0 mug L(-1) and 50 mug L(-1) of zinc standard solution (n = 8).

View Article: PubMed Central - PubMed

Affiliation: College of Architecture and Environment, Sichuan University, Chengdu 610065, China.

ABSTRACT
A simple, sensitive, reliable and flexible flow injection spectrophotometric method is proposed for on-line preconcentration and determination of trace amounts of zinc in water. At the presence of Tween-80 in pH 9.3 buffer solutions, the shade of color of Zn (II)-PAN complex is in a linear relation to the zinc amount at the point of the maximum absorption peak of 560 nm. The optimal experimental conditions, including reaction conditions and preconcentration conditions, had been obtained. The linear range of the proposed method was between 2.0 and 360 mug L(-1) and the detection limit was 0.42 mug L(-1). The relative standard deviation was 3.55% and 2.14% for 5.0 mug L(-1) and 50 mug L(-1) of zinc standard solution (n = 8). The method had been successfully applied to zinc determination in water samples and the analytical results were satisfactory.

No MeSH data available.