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2012•Chemical Science TransactionsRequires access

H-Point Standard Addition Method for Simultaneous Determination of Zinc and Nickel in Micellar Media

Rajni Rohilla, Usha Gupta

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Abstract

The H-point standard addition method (HPSAM) has been applied for simultaneous determination of Zn(II) and Ni(II) at trace levels, using Alizarin Red S (ARS) as chromogenic reagent.Both Ni(II) and Zn(II) form red colored complex with Alizarin red S at pH 7.0 which are soluble in triton x-100.Zn(II) and Ni(II) have been determined simultaneously in the concentration range of 0.320-4.55µg/mL and 0.293-4.676µg/mL respectively with satisfactory accuracy and precision.The results of applying H-point standard addition method show that Zn(II) and Ni(II) ions can be determined simultaneously with concentration ratio of 15:1 and 1:16 of Zn(II) to Ni(II).This method is based on the difference in the absorbance of Zn(II) and Ni(II) -ARS complexes at pH 7.0 using different wavelength pairs.

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The H-point standard addition method (HPSAM) has been applied for simultaneous determination of Zn(II) and Ni(II) at trace levels, using Alizarin Red S (ARS) as chromogenic reagent.Both Ni(II) and Zn(II) form red colored complex with Alizarin red S at pH 7.0 which are soluble in triton x-100.Zn(II) and Ni(II) have been determined simultaneously in the concentration range of 0.320-4.55µg/mL and 0.293-4.676µg/mL respectively with satisfactory accuracy and precision.The results of applying H-point standard addition method show that Zn(II) and Ni(II) ions can be determined simultaneously with concentration ratio of 15:1 and 1:16 of Zn(II) to Ni(II).This method is based on the difference in the absorbance of Zn(II) and Ni(II) -ARS complexes at pH 7.0 using different wavelength pairs.

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Available abstract

The H-point standard addition method (HPSAM) has been applied for simultaneous determination of Zn(II) and Ni(II) at trace levels, using Alizarin Red S (ARS) as chromogenic reagent.Both Ni(II) and Zn(II) form red colored complex with Alizarin red S at pH 7.0 which are soluble in triton x-100.Zn(II) and Ni(II) have been determined simultaneously in the concentration range of 0.320-4.55µg/mL and 0.293-4.676µg/mL respectively with satisfactory accuracy and precision.The results of applying H-point standard addition method show that Zn(II) and Ni(II) ions can be determined simultaneously with concentration ratio of 15:1 and 1:16 of Zn(II) to Ni(II).This method is based on the difference in the absorbance of Zn(II) and Ni(II) -ARS complexes at pH 7.0 using different wavelength pairs.

Key concepts: Chemistry, Chromogenic, Absorbance, Reagent, Zinc, Nickel, ALIZARIN RED, Standard addition

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