J4 ›› 2011, Vol. 10 ›› Issue (6): 1-3.

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Quantitative Analysis of P-phenylenediamine in Natural Hair Dyes

Objective:To detect the content of p-phenylenediamine in five representative kinds of natural black hair dyes in the market and evaluate the quality and safety with industry standards.Methods: p-phenylenediamine was determined by HPLC with a Eclipse XDB-Cl8 column (4.6mm×150mm,5 μm).Mobile phase Was 5%acetonitrile-bufer solution of phosphoric acid at velocity 0.8 mL/min.UV detection wavelength was 280nm.Results:The linear range of p-pheny1enediamine was between 0.025 0 and 0.400 0 mg/mL(r=0.999 9).The average recovery was 99.27%with RSD 1.49% (n=6).The content of p-phenylenediamine varied from 0.23% to 1.87% in five kinds of hair dyes.Conclusion:P-phenylenediamine was detected in five hair dyes,but none exceeded the limited standard.This method is accurate,sensitive and reproducible and may be applied to detect the content of  p-phenylenediamine in the natural hair dyes.   

  • Received:2011-04-13 Online:2011-06-01 Published:2011-06-01

Abstract:

Objective:To detect the content of p-phenylenediamine in five representative kinds of natural black hair dyes in the market and evaluate the quality and safety with industry standards.Methods: p-phenylenediamine was determined by HPLC with a Eclipse XDB-Cl8 column (4.6mm×150mm,5 μm).Mobile phase Was 5%acetonitrile-bufer solution of phosphoric acid at velocity 0.8 mL/min.UV detection wavelength was 280nm.Results:The linear range of p-pheny1enediamine was between 0.025 0 and 0.400 0 mg/mL(r=0.999 9).The average recovery was 99.27%with RSD 1.49% (n=6).The content of p-phenylenediamine varied from 0.23% to 1.87% in five kinds of hair dyes.Conclusion:P-phenylenediamine was detected in five hair dyes,but none exceeded the limited standard.This method is accurate,sensitive and reproducible and may be applied to detect the content of  p-phenylenediamine in the natural hair dyes.

Key words: jnatural hair dyes, p-phenylenediamine, content determination, PLC

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