International Journal of Agricultural Engineering

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Kinetics of Colour Changes in Marigold Petals during Microwave Drying


Affiliations
1 Division of Food Science and Post Harvest Technology, Indian Agricultural Research Institute, New Delhi, India
2 Agricultural Research Station (SKRAU), Sriganganagar (Rajasthan), India
     

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Microwave assisted convective dehydration of marigold species Pusa Narangi petals was carried out at three levels each of microwave power (140, 210 and 280 W), air temperature (30, 45 and 60°C) and a constant air velocity of 0.5 m/s. The experiment was laid out using full factorial CRD with three replications. The colour values L, a, b of the marigold petals was measured with Hunter Lab colourimeter which were found decreasing. There was change in chroma values of marigold is due to drying by using both combinations of microwave power level and temperature. The total colour change has been increased significantly during microwave drying with drying time.

Keywords

Marigold, Colour, Hunter Lab Colourimeter, Chroma.
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  • Kinetics of Colour Changes in Marigold Petals during Microwave Drying

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Authors

Sandeep Duhan
Division of Food Science and Post Harvest Technology, Indian Agricultural Research Institute, New Delhi, India
Abhijit Kar
Division of Food Science and Post Harvest Technology, Indian Agricultural Research Institute, New Delhi, India
Chander Bhan
Agricultural Research Station (SKRAU), Sriganganagar (Rajasthan), India

Abstract


Microwave assisted convective dehydration of marigold species Pusa Narangi petals was carried out at three levels each of microwave power (140, 210 and 280 W), air temperature (30, 45 and 60°C) and a constant air velocity of 0.5 m/s. The experiment was laid out using full factorial CRD with three replications. The colour values L, a, b of the marigold petals was measured with Hunter Lab colourimeter which were found decreasing. There was change in chroma values of marigold is due to drying by using both combinations of microwave power level and temperature. The total colour change has been increased significantly during microwave drying with drying time.

Keywords


Marigold, Colour, Hunter Lab Colourimeter, Chroma.

References