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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.


Effect of Tween-80concentration on the peak height.
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Related In: Results  -  Collection


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fig3: Effect of Tween-80concentration on the peak height.

Mentions: The Zn (II)-PAN complex washydrophobic. Thus, Tween-80 was selected as reagent which could increasesolubility of the system. The test results in Figure 3 showed that the peakheight increased when concentration of Tween-80 changed from 1.0% to 1.6% andthat the peak height did not increase even when concentration of Tween-80changed from 1.6% to 2.2%. Therefore, 1.6% Tween-80 was selected as the optimalconcentration for the further work.


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)

Effect of Tween-80concentration on the peak height.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig3: Effect of Tween-80concentration on the peak height.
Mentions: The Zn (II)-PAN complex washydrophobic. Thus, Tween-80 was selected as reagent which could increasesolubility of the system. The test results in Figure 3 showed that the peakheight increased when concentration of Tween-80 changed from 1.0% to 1.6% andthat the peak height did not increase even when concentration of Tween-80changed from 1.6% to 2.2%. Therefore, 1.6% Tween-80 was selected as the optimalconcentration for the further work.

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.