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Study on Spectrophotometric Determination of Platinum with 2-Hydroxy-1-Naphthalrhodanine

Lin Hong

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Abstract

Spectrophotometry is one of the most widely used methods for determination of trace Pt, the rhodanine compounds are excellent colouration agent. In the present paper, a new colouration agent, the 2-hydroxy-1-naphthalrhodanine(HNR) was synthesized, the color reaction of platinum with HNR was studied. In the presence of hydrochloric acid solution and Tween-80 medium, SBDR reacted with platinum to form a stable 2:1 complex. The molar absorptivity was 1.02×105 L·mol-1·cm-1 at 540 nm. Beer’s law was obeyed in the range of 0～2 μg/mL. This method can be applied to the determination of platinum in catalysts with good results.

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What this paper is about

Spectrophotometry is one of the most widely used methods for determination of trace Pt, the rhodanine compounds are excellent colouration agent. In the present paper, a new colouration agent, the 2-hydroxy-1-naphthalrhodanine(HNR) was synthesized, the color reaction of platinum with HNR was studied. In the presence of hydrochloric acid solution and Tween-80 medium, SBDR reacted with platinum to form a stable 2:1 complex. The molar absorptivity was 1.02×105 L·mol-1·cm-1 at 540 nm. Beer’s law was obeyed in the range of 0～2 μg/mL. This method can be applied to the determination of platinum in catalysts with good results.

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Available abstract

Spectrophotometry is one of the most widely used methods for determination of trace Pt, the rhodanine compounds are excellent colouration agent. In the present paper, a new colouration agent, the 2-hydroxy-1-naphthalrhodanine(HNR) was synthesized, the color reaction of platinum with HNR was studied. In the presence of hydrochloric acid solution and Tween-80 medium, SBDR reacted with platinum to form a stable 2:1 complex. The molar absorptivity was 1.02×105 L·mol-1·cm-1 at 540 nm. Beer’s law was obeyed in the range of 0～2 μg/mL. This method can be applied to the determination of platinum in catalysts with good results.

Key concepts: Molar absorptivity, Platinum, Rhodanine, Spectrophotometry, Hydrochloric acid, Chemistry, Nuclear chemistry, Color reaction

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