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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 PAN concentration onthe peak height.
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fig2: Effect of PAN concentration onthe peak height.

Mentions: The reagent concentration was another important factor in flow injectionanalysis. The effect of PAN concentration on the peak height were tested from 5 × 10−5 mol L−1 to 1.2 × 10−3 mol L−1 in Figure 2. The results showedthat the peak height rose when concentration of PAN changed from 5 × 10−5 mol L−1 to 4 × 10−4 mol L−1, and the peak height declinedwhen concentration of PAN changed from 4 × 10−4 mol L−1 to 1.2 × 10−3 mol L−1. Therefore, 4 × 10−4 mol L−1 PAN was selected for furtherwork.


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 PAN concentration onthe peak height.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig2: Effect of PAN concentration onthe peak height.
Mentions: The reagent concentration was another important factor in flow injectionanalysis. The effect of PAN concentration on the peak height were tested from 5 × 10−5 mol L−1 to 1.2 × 10−3 mol L−1 in Figure 2. The results showedthat the peak height rose when concentration of PAN changed from 5 × 10−5 mol L−1 to 4 × 10−4 mol L−1, and the peak height declinedwhen concentration of PAN changed from 4 × 10−4 mol L−1 to 1.2 × 10−3 mol L−1. Therefore, 4 × 10−4 mol L−1 PAN was selected for furtherwork.

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.