Influence of Heat Treatment on the Physicochemical Property and Mineral Composition of Various Processed Salts

  • Han, Sung-Hee (Institute of Life Science and Natural Resources, Korea University) ;
  • Lee, Seog-Won (Department of Food and Nutrition, Yuhan College) ;
  • Rhee, Chul (Division of Food Bioscience and Technology, College of Life Sciences and Biotechnology, Korea University)
  • Published : 2008.10.31


The effects of heat treatment on the physicochemical properties and mineral composition of sun-dried salt were investigated. The salts parched at high temperature were appeared the higher alkalinity and the lower oxidation-reduction potential (ORP) than the samples without heat treatment. The commercial salts (bamboo salt and yellow loess salt) and the sun-dried salt parched at high temperature had relatively higher sodium ion content (418-450 ppm) compared to that (418.0 ppm) of refined salt. The increase of calcium ion occurred in the salts parched at high temperature compared to the sun-dried salt without heat treatment, but the magnesium ion was vice versa. The commercial salt, yellow loess salt had highest turbidity (0.973) whereas sun-dried salt showed lowest level (0.097) among the tested samples. Turbidity of heat treatment samples decreased as solubility increased. The maximum concentration of dialyzed salt was reached after 4 hr regardless of various processed salts, but those had no difference significantly among the tested samples. The X-ray diffraction patterns of the parched sun-dried salts showed different peak intensity with common salts, and they were similar to the patterns of oxide salts, especially MgO. The maximum value (2.56%) of MgO appeared in the sun-dried salt parched at $1,400^{\circ}C$.


  1. Bang JH, Park BY, Kim DS. Effects of bamboo salt ingestion on blood pressure and serum electrolytes. J. Korean Soc. Hyg. Sci. 8: 87-95 (2002)
  2. Kim DH, Rhim JW, Lee SB. Characteristics of seaweed salts prepared with various seaweeds. Korean J. Food Sci. Technol. 35: 62-66 (2003)
  3. Choi YJ, Lin TM, Tomlinson K, Park JW. Effect of salt concentration and temperature of storage water on the physicochemical properties of fish proteins. Lebensm. -Wiss. Technol. 41: 460-468 (2008)
  4. Niamnuy C, Devahastin S, Soponronnarit S. Changes in protein compositions and their effects on physical changes of shrimp during boiling in salt solution. Food Chem. 108: 165-175 (2008)
  5. Papastamatiou F, Gerasopoulos D, Siomos A, Bloukas JG. Effect of degree of cutting of leek on physicochemical characteristics of Greek traditional sausages. Meat Sci. 75: 648-654 (2007)
  6. Graudal N. Commentary: Possible role of salt intake in the development of essential hypertension. Int. J. Epidemiol. 34: 972-974 (2005)
  7. Haddy FJ. Role of dietary salt in hypertension. Life Sci. 79: 1585-1592 (2006)
  8. Tekol Y. Irreversible and reversible components in the genesis of hypertension by sodium chloride (salt). Med. Hypotheses 70: 255-259 (2008)
  9. Shin TS, Park CK, Lee SH, Han KH. Effects of age on chemical composition in sun-dried salts. Korean J. Food Sci. Technol. 37: 312-317 (2005)
  10. Park JW, Kim SJ, Kim SH, Kim BH, Kang SG. Determination of mineral and heavy metal contents of various salts. Korean J. Food Sci. Technol. 32: 1442-1445 (2000)
  11. Narasinga Rao BS, Vijayasarathy C. Fortification of common salt with iron: Effect of chemical additives on stability and bioavailability. Am. J. Clin. Nutr. 28: 1395-1401 (1975)
  12. Harris MJ, Jooste PL, Charlton KE. The use of iodised salt in the manufacturing of processed foods in South Africa: Bread and bread premixes, margarine, and flavourants of salty snacks. Int. J. Food Sci. Nutr. 54: 13-19 (2003)
  13. Kim YM, Byun JY, NamGung B, Jo JH, Do JR, In JP. Studies on functional salts fortified with seaweed components. Korean J. Food Sci. Technol. 39: 152-157 (2007)
  14. Moon DS, Kim HJ, Shin PK, Jung DH. Charateristics of chemical contents of horizontal spray salts from deep ocean water. J. Korean Fish. Soc. 38: 65-69 (2005)
  15. Kim SH, Kang SY, Jung KK, Kim TG, Han HM, Rheu HM, Moon AR. Characterization and anti-gastric ulcer activity of bamboo salts. J. Food Hyg. Saf. 13: 252-257 (1998)
  16. Kim YH, Ryu HI. Elements in a bamboo salt and comparison of its elemental contents with those on other salts. pp. 1-17. In: International Symposium. October 19. SookMyung Women's University, Seoul, Korea. The Pharmaceutical Society of Korea, Seoul, Korea (2001)
  17. MHW. Food Standard Code. The Ministry of Health and Welfare, Seoul, Korea. pp. 173-177 (2000)
  18. AOAC. Official Method of Analysis of AOAC Int. 13th ed. Method 532-534. Association of Official Analytical Chemists, Washington DC, USA (1980)
  19. Schorsch C, Jones MG, Norton IT. Thermodynamic incompatibility and microstructure of milk protein/locust bean gum/sucrose systems. Food Hydrocolloid 13: 89-99 (1999)
  20. Ju IO, Jung GT, Ryu J, Kim YS. Effect of heat treatments on physical properties and in vitro glucose, bile acid, and cadmium transport retardation of wax gourd (Benincasa hispida). Korean J. Food Sci. Technol. 35: 1117-1123 (2003)
  21. Korea Food Additives Code. Korea Food Research Institute, Moon Young Sa, Seoul, Korea. p. 510 (2002)
  22. Shin HK, Hwang SH, Youn KS. Absorption characteristics and prediction model of ginger powder by different drying methods. Korean J. Food Sci. Technol. 35: 211-216 (2003)
  23. Kim SJ, Kim HL, Ham KS. Characterization of kimchi fermentation prepared with various salts. Korean J. Food Preserv. 12: 395-401 (2005)
  24. Lee GD, Kim SK, Kim JO, Kim ML. Comparison of quality characteristics of salted muskmelon with deep seawater salts, sundried salts, and purified salts. J. Korean Soc. Food Sci. Nutr. 32: 840-846 (2003)
  25. Whitten KW, Davis RE, Peck L, Stanly GG. General Chemistry. 7th ed. Thomson Press, Toronto, Canada. pp. 479-488 (2003)