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2009•Journal of Foshan UniversityRequires access

A study on the extraction of purple pigment and its stability

Yonghui Pan

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Abstract

This paper mainly studied the stability of pigment extracted from purple setcreasea.The purple pigment was stable when the pH of acidic solution is between 4～6.It was stable to heating.The residue of purple pigment reaches 90% after an exposure to a 2 000 lux light for 24 h.Oxidant H2O2 and reductant Na2O3 can destroy the purple pigment.Metal ions had little while sucrose and sodium benzoate had no effect on the stability of purple pigment.It is concluded that the purple pigment has very good stability.

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What this paper is about

This paper mainly studied the stability of pigment extracted from purple setcreasea.The purple pigment was stable when the pH of acidic solution is between 4～6.It was stable to heating.The residue of purple pigment reaches 90% after an exposure to a 2 000 lux light for 24 h.Oxidant H2O2 and reductant Na2O3 can destroy the purple pigment.Metal ions had little while sucrose and sodium benzoate had no effect on the stability of purple pigment.It is concluded that the purple pigment has very good stability.

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Available abstract

This paper mainly studied the stability of pigment extracted from purple setcreasea.The purple pigment was stable when the pH of acidic solution is between 4～6.It was stable to heating.The residue of purple pigment reaches 90% after an exposure to a 2 000 lux light for 24 h.Oxidant H2O2 and reductant Na2O3 can destroy the purple pigment.Metal ions had little while sucrose and sodium benzoate had no effect on the stability of purple pigment.It is concluded that the purple pigment has very good stability.

Key concepts: Pigment, Sodium benzoate, Chemistry, Metal ions in aqueous solution, Metal, Residue (chemistry), Sucrose, Nuclear chemistry

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