Introduction of Green pH Indicator from Saffron Petals and Determination of Anthocyanins Content from its Wastes

Bagherzade, Ghodsieh; Manzaritavakoli, Maryam

doi:10.22077/jsr.2017.677.1026

Document Type : Original Article

Authors

Phytochemistry Student Research Laboratory of Organic Chemistry, University of Birjand

https://doi.org/10.22077/jsr.2017.677.1026

Abstract

Saffron is a spice derived from the flowers of Crocus Sativus L. Which for years has been known in the world as an expensive spice. But huge amount of the petals are discarded as useless waste. The color of saffron petals due to the compounds that called anthocyanins and flavonoids. Anthocyanins, are a class of natural compounds and secondary metabolites in family of flavonoids. Indicators are the Colored organic compounds with complex structure which change in pH change their color.
In this study, saffron's wastages of 32 different region were collected from fields of saffron of Razavi Khorasan, Southern Khorasan and Kerman in November and then were transferred to the freezer with a temperature of -15 ° C.
The amount of anthocyanins was determined in saffron's wastages then rainfall and temperature in different regions from April and November 2014 were asked from Bureau of Meteorology. The SPSS 18 was used for statistical analysis. Statistical analysis shown that there is a strong correlation between anthocyanins and amount of rain.
Due to the abundant presence of anthocyanins in saffron waste, successful pursuit Done to use this natural pigments as an indicator. Results showed the colour of anthocyanin pigments changes drastically with change in pH value, so it can be used as a natural and effective indicator to detect acid and base.

Keywords

References

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