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2002•Journal of Guangxi Normal UniversityRequires access

SYNTHESIS OF A NEW COLOUR REAGENT 5-(6-METHOXY-2-BENZOTHIAZOLEAZO)-8-HYDROXYQUINOLINE AND SPECTROPHOTOMETRIC DETERMINATION OF NICKEL

Dian Liu

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Abstract

The synthesis of 5(6methoxy2benzothiazoleazo)8hydroxyquinoline (MBTAHQ),and the conditions of colour reaction with Ni(Ⅱ) are reported.The results show that the colour reagent reacts with Ni(Ⅱ) to form a kind of purplish red complex in the presence of OP at pH5.5 acesate buffer solution.The composition of complex is n(Ni)∶n(MBTAHQ)=1∶2.The wavelength of maximum absorbance of Ni(Ⅱ)MBTAHQ is 575nm,and its apparent molar absorptivity is 1.46×105L·mol-1·cm-1.Beer's law is obeyed in the range of 0～240μg/L.The method has been applied to the determination of nickel in aluminium alloy with satisfactory results.

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The synthesis of 5(6methoxy2benzothiazoleazo)8hydroxyquinoline (MBTAHQ),and the conditions of colour reaction with Ni(Ⅱ) are reported.The results show that the colour reagent reacts with Ni(Ⅱ) to form a kind of purplish red complex in the presence of OP at pH5.5 acesate buffer solution.The composition of complex is n(Ni)∶n(MBTAHQ)=1∶2.The wavelength of maximum absorbance of Ni(Ⅱ)MBTAHQ is 575nm,and its apparent molar absorptivity is 1.46×105L·mol-1·cm-1.Beer's law is obeyed in the range of 0～240μg/L.The method has been applied to the determination of nickel in aluminium alloy with satisfactory results.

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Available abstract

The synthesis of 5(6methoxy2benzothiazoleazo)8hydroxyquinoline (MBTAHQ),and the conditions of colour reaction with Ni(Ⅱ) are reported.The results show that the colour reagent reacts with Ni(Ⅱ) to form a kind of purplish red complex in the presence of OP at pH5.5 acesate buffer solution.The composition of complex is n(Ni)∶n(MBTAHQ)=1∶2.The wavelength of maximum absorbance of Ni(Ⅱ)MBTAHQ is 575nm,and its apparent molar absorptivity is 1.46×105L·mol-1·cm-1.Beer's law is obeyed in the range of 0～240μg/L.The method has been applied to the determination of nickel in aluminium alloy with satisfactory results.

Key concepts: Molar absorptivity, Reagent, 8-Hydroxyquinoline, Absorbance, Nickel, Color reaction, Aluminium, Spectrophotometry

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SYNTHESIS OF A NEW COLOUR REAGENT 5-(6-METHOXY-2-BENZOTHIAZOLEAZO)-8-HYDROXYQUINOLINE AND SPECTROPHOTOMETRIC DETERMINATION OF NICKEL — Research Paper | ScholarLens