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Determination of Trace Lead Content by Using Rhodamine B Spectrophotometry with Lead(II)-Potassium Iodide

Ping Liu

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Abstract

The chemical reaction that the lead-iodide complex compound,which formed from lead(II) and iodization potassium,reacted with Rhodamine B to form multi-ion-association complex was studied when Polyvinyl Alcohol(PVA) and gum arabic existed simultaneously.The maximum absorption on the ion-association complex was at 595nm and the apparent molar absorption coefficient was 4.6×105 L·mol-1·cm-1.This method has high sensitivity and selectivity,and the method is very simple and rapid when trace lead is determined directly at the water phase.

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What this paper is about

The chemical reaction that the lead-iodide complex compound,which formed from lead(II) and iodization potassium,reacted with Rhodamine B to form multi-ion-association complex was studied when Polyvinyl Alcohol(PVA) and gum arabic existed simultaneously.The maximum absorption on the ion-association complex was at 595nm and the apparent molar absorption coefficient was 4.6×105 L·mol-1·cm-1.This method has high sensitivity and selectivity,and the method is very simple and rapid when trace lead is determined directly at the water phase.

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Available abstract

The chemical reaction that the lead-iodide complex compound,which formed from lead(II) and iodization potassium,reacted with Rhodamine B to form multi-ion-association complex was studied when Polyvinyl Alcohol(PVA) and gum arabic existed simultaneously.The maximum absorption on the ion-association complex was at 595nm and the apparent molar absorption coefficient was 4.6×105 L·mol-1·cm-1.This method has high sensitivity and selectivity,and the method is very simple and rapid when trace lead is determined directly at the water phase.

Key concepts: Chemistry, Spectrophotometry, Iodide, Potassium, Molar absorptivity, Polyvinyl alcohol, Ion-association, Iodine

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