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2003•Journal of Instrumental AnalysisRequires access

Color Reaction of New Reagent2,3,7-Trihydroxy-9-(3,5-dichloro-4- hydroxy)phenylfluorone with Tungsten(VI)

Huang Yingping

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Abstract

In the presence of cetyltrimethylammonium bromide(CTMAB),the color reaction and photometric properties of a newreagent2,3,7-trihydroxy-9-(3,5-dichloro-4-hydroxyl)phenylfluorone(DCHPF)with tungsten(Ⅵ)were studied.In the0.6mol/LHCl medium,the DCHPF reacts with tungsten(Ⅵ)from a red complex with stoichiometric ratio of2∶1,a maximum absorption at536nm and an apparent molar absorptivity of1.28×10 5 L·mol -1 ·cm -1 .Beer's lawwas obeyed in the range of0～0.4mg/L tungsten(Ⅵ).The method was applied for the determination of tungsten in steel samples with satisfactory results.

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What this paper is about

In the presence of cetyltrimethylammonium bromide(CTMAB),the color reaction and photometric properties of a newreagent2,3,7-trihydroxy-9-(3,5-dichloro-4-hydroxyl)phenylfluorone(DCHPF)with tungsten(Ⅵ)were studied.In the0.6mol/LHCl medium,the DCHPF reacts with tungsten(Ⅵ)from a red complex with stoichiometric ratio of2∶1,a maximum absorption at536nm and an apparent molar absorptivity of1.28×10 5 L·mol -1 ·cm -1 .Beer's lawwas obeyed in the range of0～0.4mg/L tungsten(Ⅵ).The method was applied for the determination of tungsten in steel samples with satisfactory results.

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Available abstract

In the presence of cetyltrimethylammonium bromide(CTMAB),the color reaction and photometric properties of a newreagent2,3,7-trihydroxy-9-(3,5-dichloro-4-hydroxyl)phenylfluorone(DCHPF)with tungsten(Ⅵ)were studied.In the0.6mol/LHCl medium,the DCHPF reacts with tungsten(Ⅵ)from a red complex with stoichiometric ratio of2∶1,a maximum absorption at536nm and an apparent molar absorptivity of1.28×10 5 L·mol -1 ·cm -1 .Beer's lawwas obeyed in the range of0～0.4mg/L tungsten(Ⅵ).The method was applied for the determination of tungsten in steel samples with satisfactory results.

Key concepts: Chemistry, Tungsten, Molar absorptivity, Color reaction, Bromide, Stoichiometry, Molar ratio, Spectrophotometry

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Color Reaction of New Reagent2,3,7-Trihydroxy-9-(3,5-dichloro-4- hydroxy)phenylfluorone with Tungsten(VI) — Research Paper | ScholarLens