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2003•Chinese Journal of Spectroscopy LaboratoryRequires access

Determination of Silver by Solid Phase Extraction Spectrophotometry with 5-(p-Aminobenzylidene)-Rhodanine

Meng Dong, Hu Qiu

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Abstract

In pH=2.6 citric acid-sodium hydroxide buffer solution and emulsifier-OP medium,5-(p-aminobenzylidene)-rhodanine (ABR) can react with silver(Ⅰ) to form a stable 2∶1 complex.The colored complex can be extracted by C 18 cartridge and eluted from the cartridge by ethanol (containing 5% acetic acid), then determined by spectrophotometry. The molar absorptivity is 5.53×10 4L·mol -1·cm -1 at 530nm. Beer's law is obeyed in the range of 0-2μg/mL.This method was applied to the determination of silver in water with good results.

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What this paper is about

In pH=2.6 citric acid-sodium hydroxide buffer solution and emulsifier-OP medium,5-(p-aminobenzylidene)-rhodanine (ABR) can react with silver(Ⅰ) to form a stable 2∶1 complex.The colored complex can be extracted by C 18 cartridge and eluted from the cartridge by ethanol (containing 5% acetic acid), then determined by spectrophotometry. The molar absorptivity is 5.53×10 4L·mol -1·cm -1 at 530nm. Beer's law is obeyed in the range of 0-2μg/mL.This method was applied to the determination of silver in water with good results.

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Available abstract

In pH=2.6 citric acid-sodium hydroxide buffer solution and emulsifier-OP medium,5-(p-aminobenzylidene)-rhodanine (ABR) can react with silver(Ⅰ) to form a stable 2∶1 complex.The colored complex can be extracted by C 18 cartridge and eluted from the cartridge by ethanol (containing 5% acetic acid), then determined by spectrophotometry. The molar absorptivity is 5.53×10 4L·mol -1·cm -1 at 530nm. Beer's law is obeyed in the range of 0-2μg/mL.This method was applied to the determination of silver in water with good results.

Key concepts: Rhodanine, Spectrophotometry, Molar absorptivity, Chemistry, Sodium hydroxide, Citric acid, Chromatography, Nuclear chemistry

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