Extraction—Spectrophotometric Determination of Trace Amounts of Barium by 18-Crown-6 and Rose Bengal

PARHAM Hooshang, FAZELI Abbass G.

doi:10.2116/analsci.16.575

Extraction—Spectrophotometric Determination of Trace Amounts of Barium by 18-Crown-6 and Rose Bengal

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PARHAM Hooshang

Department of Chemistry, Faculty of Science, Azad University
FAZELI Abbass G.

Department of Chemistry, Faculty of Science, Azad University

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タイトル別名

Extraction-Spectrophotometric Determination of Trace Amounts of Barium by 18-Crown-6 and Rose Bengal.

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抄録

A simple and sensitive extraction-spectrophotometric method for the determination of barium is reported. The 18C6-barium-Rose Bengal (18C6-Ba-RB) ternary complex was quantitatively extracted into dichloromethane, and its absorbance was measured at 565 nm. The calibration graph is linear over a barium concentration range of 0.083 - 4.70 µg ml^-1. The limit of detection of barium was 17.7 ng ml^-1. The relative standard deviation (RSD) of ten replicate measurements was 2.19% for a 0.83 µg ml^-1 barium solution. The interference effects of various cations and anions were also studied and reported. The described method provides a simple and reliable means for determination of trace amounts of barium in real samples.