Determination of Pb2+ in Wastewater by Lead(II)-dithizone-xylenol Orange Tenary Complex Spectrophotometry

Jian Qi Sun

doi:10.4028/www.scientific.net/AMR.1030-1032.301

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1030-1032Determination of Pb2+ in Wastewater by...

Determination of Pb²⁺ in Wastewater by Lead(II)-dithizone-xylenol Orange Tenary Complex Spectrophotometry

Abstract:

An novel Lead (II)-dithizone-xylenol orange tenary complex spectrophotometry was developed for the determination of Pb²⁺ in wastewater. For this purpose, the parameters of spectrophotometry such as the detection wavelength, pH value, the dosage of dithizone-xylenol orange and reaction time were studied and optimized through orthogonal tests. The method was linear in the ranges from 2.1×10^-³ to 6.0 μg·mL^-1 for Pb²⁺ with R² ≥ 0.999. The procedure allowed efficient recovery of the investigated Pb²⁺ ranging between 95 % and 103 % with a relative standard deviation (RSD) ≤ 2.1 for actual wastewater samples spiked with 1.00, 2.00 and 3.00 μg·mL^-1 of standard Pb²⁺, respectively. These results show the method can be applied to the direct determination of Pb²⁺ in wastewater, avoiding the use of toxic extrant (chloroform) and masking reagent (sodium cyanide) in the traditional methods and time-consuming procedures, moreover, the investigated method is simple, accurate, reliable, and inexpensive, which implies the potential of this technique for Pb²⁺ monitoring in wastewater samples.

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Periodical:

Advanced Materials Research (Volumes 1030-1032)

Pages:

301-304

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1030-1032.301

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Online since:

September 2014

Authors:

Jian Qi Sun*

Keywords:

Dithizone, Pb²⁺, Spectrophotometry, Tenary Complex, Wastewater, Xylenol Orange

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