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Aim of our present study was to analyze physico-chemical properties of tomato ketchup samples available in the local market. Major part of tomato consumption comes under processed products like tomato juice, ketchup and sauce. Recent studies have indicated the potential health benefits of a diet that are rich in tomatoes. Study of various physico-chemical parameter testing of four different types of tomato ketchup samples. Study was performed in Department of Applied Sciences, Chemistry section, University of Technology and Applied Sciences, Muscat, Oman during the September 2017 – April 2018.
We have selected four different tomato ketchup samples from the local brand and tested for their various physical and chemical parameters such as, pH, conductivity, viscosity, solubility, acidity total, moisture, ash, vitamin C, sodium, potassium, calcium and magnesium. We have used routine and simple techniques for analysis. Such as some chemical methods, Flame photometer etc. We have found that, pH was in the range of 3.6 – 3.8, conductivity 5.38 – 8.71 MS/cm, viscosity 3.93 – 6.76 Pa s, solubility 53.35 – 61.12, titratable acidity 3.2 – 4.01 g/100 gm, (pH metric 3.6 – 4.3 g/100 gm), ash 1.62 – 2.98%, vitamin C 17.25 – 55.23 mg/100 gm, sodium 294.5 – 475.85 ppm, potassium 93.5 – 153.3 ppm, magnesium 106 – 163 ppm, calcium 67 – 117 ppm. The result found in our analysis was more or less close to each other. On the basis of result obtained during the analysis of four tomato ketchup samples Jumbo sample was good amount of vitamin C, less ash value lowest sodium content.
FAO. FAOSTATS: Tomato production. Food and Agriculture Organization of the United Nations; 2013. Available:http://faostat3.fao.org/faostat-gateway/go/to/download/Q/QC/E (Accessed March 2014).
Shi J, M Le Maguer ML. Lycopene in tomatoes: Chemical and physical properties affected by food processing. Crit Rev Food Sci Nutr. 2000;40(1): 1-42. DOI: 10.1080/10408690091189275
Rao AV, Waseem Z, Agarwal S. Lycopene contents of tomatoes and tomato products and their contribution to dietary lycopene. Food Research International. 1998;31(10): 737-741. DOI: 10.1016/S0963-9969(99)00053-8
Jarmila L, Jolana K, Zlatica K. The quality and authenticity markers of tomato ketchup. Acta Chimica Slovaca. 2009;2(2): 88–96.
Alexandra T, Bohuslava T, Josef B, Jozef G. Radoslav Z, Vladimir V. Determination of ketchup sensory texture acceptability and examination of determining factors as a basis for product optimization. International Journal of Food Properties. 2015;18:660–669. DOI: 10.1080/10942912.2013.853186
Kumar V, Kumar L, Kumar K, Goyal SK, Kumar A, Jain G. Physico-chemical and quality evaluation of tomato ketchup during storage. South Asian Journal of Food Technology and Environment. 2015; 1(3&4):250-255.
Vojtĕch K, Sylvie O, Šárka N. Rheological properties of tomato ketchup. Potravinarstvo Slovak Journal of Food Sciences. 2019;13(1). DOI: 10.5219/1161
Thakur BR, Singh RK, Nelson PE. Quality attributes of processed tomato products: A review. Food Reviews International. 1996; 12(3):375-401.
Karla A, Silveira M, Flávio LS. The tomato paste quality attributes along the industrial processing chain. African Journal of Food Science. 2019;13(10):215-224. DOI: 10.5897/AJFS2019.1825 Article Number: 2AABD3162120
Alexandra T, Bohuslava T, Josef B, Jozef G, Radoslav Z, Vladimir V. Determination of ketchup sensory texture acceptability and examination of determining factors as a basis for product optimization. International Journal of Food Properties. 2015;18:3,660-669. DOI: 10.1080/10942912.2013.853186
Radoslav Z, Vladimir V. Determination of ketchup sensory texture acceptability and examination of determining factors as a basis for product optimization. International Journal of Food Properties. 2015;18(3): 660-669. DOI: 10.1080/10942912.2013.853186
AOAC. Official Methods of Analysis. The Association of Official Analytical Chemists. 17th Ed. Arlington, Virginia, USA; 2005.