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Study on Pigment Stability of Crayfish Offal

Wenshui Xia

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Abstract

The pigment stability from crayfish offal was studied in this paper. The results showed that the pigment unstable under light and high temperature and when the temperature was over 70℃, a sharp decrease in color is found. There is a decreasing trend of absorbance in higher wavelength with the temperature increasing and the maximum absorbance wavelength is moved to relatively short wavelength. The maximum absorbance wavelength of pigment varies in different solvents. The stability of pigment in ethanol is higher than that in acetone. The pigment is stable in the presence of Ca2+ and Zn2+, while unstable in the presence of Fe2+ and Cu2+.

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What this paper is about

The pigment stability from crayfish offal was studied in this paper. The results showed that the pigment unstable under light and high temperature and when the temperature was over 70℃, a sharp decrease in color is found. There is a decreasing trend of absorbance in higher wavelength with the temperature increasing and the maximum absorbance wavelength is moved to relatively short wavelength. The maximum absorbance wavelength of pigment varies in different solvents. The stability of pigment in ethanol is higher than that in acetone. The pigment is stable in the presence of Ca2+ and Zn2+, while unstable in the presence of Fe2+ and Cu2+.

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Available abstract

The pigment stability from crayfish offal was studied in this paper. The results showed that the pigment unstable under light and high temperature and when the temperature was over 70℃, a sharp decrease in color is found. There is a decreasing trend of absorbance in higher wavelength with the temperature increasing and the maximum absorbance wavelength is moved to relatively short wavelength. The maximum absorbance wavelength of pigment varies in different solvents. The stability of pigment in ethanol is higher than that in acetone. The pigment is stable in the presence of Ca2+ and Zn2+, while unstable in the presence of Fe2+ and Cu2+.

Key concepts: Absorbance, Pigment, Crayfish, Acetone, Wavelength, Ethanol, Chemistry, Materials science

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