Investigation of chemical and qualitative properties of compressed tablet production from tomato powder under microwave-hot air condition and process optimization using response surface method

Document Type : Research Paper

Authors

1 Department of Biosystems Engineering, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran.

2 Department of Horticultural Sciences, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran.

Abstract

Drying of food tablet is one of the most important peocesses in tablet production that play a vital role in food gradient preservation. In this research, the effect of different conditions of microwave-hot air drying (air temperature, inlet air velocity and microwave exposure time) on the qualitative and chemical properties of the compressed tablet produced from tomato powder containing lycopene content, concentration of vitamin C, total phenol content, antioxidant activity and color indices of ΔL*, Δa* and Δb* were studied. To analyze the data and optimize the process, the response surface method and central composite design were used. Input parameters (independent) were: inlet air temperature, inlet air velocity and microwave exposure time. Dependent parameters (responses) were: lycopene content, concentration of vitamin C, total phenol content, antioxidant activity and color indices of ΔL*, Δa* and Δb*. For drying samples, five levels of air temperatures (40, 50, 60, 70 and 80 °C), air velocity (0.5, 1, 1.5, 2, and 2.5 m/s) and microwave exposure time (0, 4, 8, 12 and 16 seconds) were applied. The amounts of lycopene content, concentration of vitamin C, total phenol content, antioxidant activity, ΔL*, Δa* and Δb* were achievd between 865 to 2205.6 mg.100gDM-1, 0 to 0.88 mgascorbic/gDM, 0.36 to 8.9 mg GAE/g DM, 34.95 to 99.02%, 12.89 to 18.98, 5.35 to 14.609 and 6.78 to 13.21, respectively. The optimum drying point of the at air temperature of 50 °C, air velocity of 1.07 m/s and microwave exposore time of 4 seconds were obtained and the response variable values in the optimal point containing lycopene content, concentration of vitamin C, total phenol content, antioxidant activity and color indices of ΔL*, Δa* and Δb* were obtained 434.7 mg/100gDM,0.66 mgascorbic/gDM, 7.78 mg GAE/g DM, %50.11, 14.76, 8.49 and 7.61, respectively. Results indicated that the drying under lower temperature (50°C) and lower exposore time of microwave radiation (4 seconds) with fixed power (90 W) caused to further ingredient materials preservation and increasing in desirability index.


Drying of food tablet is one of the most important peocesses in tablet production that play a vital role in food gradient preservation. In this research, the effect of different conditions of microwave-hot air drying (air temperature, inlet air velocity and microwave exposure time) on the qualitative and chemical properties of the compressed tablet produced from tomato powder containing lycopene content, concentration of vitamin C, total phenol content, antioxidant activity and color indices of ΔL*, Δa* and Δb* were studied. To analyze the data and optimize the process, the response surface method and central composite design were used. Input parameters (independent) were: inlet air temperature, inlet air velocity and microwave exposure time. Dependent parameters (responses) were: lycopene content, concentration of vitamin C, total phenol content, antioxidant activity and color indices of ΔL*, Δa* and Δb*. For drying samples, five levels of air temperatures (40, 50, 60, 70 and 80 °C), air velocity (0.5, 1, 1.5, 2, and 2.5 m/s) and microwave exposure time (0, 4, 8, 12 and 16 seconds) were applied. The amounts of lycopene content, concentration of vitamin C, total phenol content, antioxidant activity, ΔL*, Δa* and Δb* were achievd between 865 to 2205.6 mg.100gDM-1, 0 to 0.88 mgascorbic/gDM, 0.36 to 8.9 mg GAE/g DM, 34.95 to 99.02%, 12.89 to 18.98, 5.35 to 14.609 and 6.78 to 13.21, respectively. The optimum drying point of the at air temperature of 50 °C, air velocity of 1.07 m/s and microwave exposore time of 4 seconds were obtained and the response variable values in the optimal point containing lycopene content, concentration of vitamin C, total phenol content, antioxidant activity and color indices of ΔL*, Δa* and Δb* were obtained 434.7 mg/100gDM,0.66 mgascorbic/gDM, 7.78 mg GAE/g DM, %50.11, 14.76, 8.49 and 7.61, respectively. Results indicated that the drying under lower temperature (50°C) and lower exposore time of microwave radiation (4 seconds) with fixed power (90 W) caused to further ingredient materials preservation and increasing in desirability index.

Drying of food tablet is one of the most important peocesses in tablet production that play a vital role in food gradient preservation. In this research, the effect of different conditions of microwave-hot air drying (air temperature, inlet air velocity and microwave exposure time) on the qualitative and chemical properties of the compressed tablet produced from tomato powder containing lycopene content, concentration of vitamin C, total phenol content, antioxidant activity and color indices of ΔL*, Δa* and Δb* were studied. To analyze the data and optimize the process, the response surface method and central composite design were used. Input parameters (independent) were: inlet air temperature, inlet air velocity and microwave exposure time. Dependent parameters (responses) were: lycopene content, concentration of vitamin C, total phenol content, antioxidant activity and color indices of ΔL*, Δa* and Δb*. For drying samples, five levels of air temperatures (40, 50, 60, 70 and 80 °C), air velocity (0.5, 1, 1.5, 2, and 2.5 m/s) and microwave exposure time (0, 4, 8, 12 and 16 seconds) were applied. The amounts of lycopene content, concentration of vitamin C, total phenol content, antioxidant activity, ΔL*, Δa* and Δb* were achievd between 865 to 2205.6 mg.100gDM-1, 0 to 0.88 mgascorbic/gDM, 0.36 to 8.9 mg GAE/g DM, 34.95 to 99.02%, 12.89 to 18.98, 5.35 to 14.609 and 6.78 to 13.21, respectively. The optimum drying point of the at air temperature of 50 °C, air velocity of 1.07 m/s and microwave exposore time of 4 seconds were obtained and the response variable values in the optimal point containing lycopene content, concentration of vitamin C, total phenol content, antioxidant activity and color indices of ΔL*, Δa* and Δb* were obtained 434.7 mg/100gDM,0.66 mgascorbic/gDM, 7.78 mg GAE/g DM, %50.11, 14.76, 8.49 and 7.61, respectively. Results indicated that the drying under lower temperature (50°C) and lower exposore time of microwave radiation (4 seconds) with fixed power (90 W) caused to further ingredient materials preservation and increasing in desirability index.

Keywords

References

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Food Research Journal
Volume 30, Issue 4
February 2021
Pages 83-80

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