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2011•Chinese Journal of Analysis LaboratoryRequires access

Study on the color reaction of cetylpyridinium chloride with a new reagent 4,4′-di(2-chloro-4-nitrophenyldiazoamino) biphenyl

HE Xiao-ling

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Abstract

In this paper,the colour reaction of CPC with 4,4′-Di(2-chloro-4-nitrophenyl-diazoamino)biphenyl(CNDADP) has been studied.The results show that in the medium of pH10.6,CNDADP reacts with CPC to form a purple-red ion pair complex with the molar ratio of 1:2.The ion pair complex exhibits maximum absorption at 570nm with a molar absorptivity of 2.16×104L·mol-1·cm-1,and Beer's law is obeyed in the range of 0～3.0×10-5 mol/L.The method has been applied to the determination of micro CPC in water samples with satisfactory results.

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What this paper is about

In this paper,the colour reaction of CPC with 4,4′-Di(2-chloro-4-nitrophenyl-diazoamino)biphenyl(CNDADP) has been studied.The results show that in the medium of pH10.6,CNDADP reacts with CPC to form a purple-red ion pair complex with the molar ratio of 1:2.The ion pair complex exhibits maximum absorption at 570nm with a molar absorptivity of 2.16×104L·mol-1·cm-1,and Beer's law is obeyed in the range of 0～3.0×10-5 mol/L.The method has been applied to the determination of micro CPC in water samples with satisfactory results.

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Available abstract

In this paper,the colour reaction of CPC with 4,4′-Di(2-chloro-4-nitrophenyl-diazoamino)biphenyl(CNDADP) has been studied.The results show that in the medium of pH10.6,CNDADP reacts with CPC to form a purple-red ion pair complex with the molar ratio of 1:2.The ion pair complex exhibits maximum absorption at 570nm with a molar absorptivity of 2.16×104L·mol-1·cm-1,and Beer's law is obeyed in the range of 0～3.0×10-5 mol/L.The method has been applied to the determination of micro CPC in water samples with satisfactory results.

Key concepts: Chemistry, Molar absorptivity, Cetylpyridinium chloride, Reagent, Color reaction, Biphenyl, Chloride, Absorption (acoustics)

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Study on the color reaction of cetylpyridinium chloride with a new reagent 4,4′-di(2-chloro-4-nitrophenyldiazoamino) biphenyl — Research Paper | ScholarLens