Characteristics of Seaweed Salts Prepared with Various Seaweeds

해조소금의 성분 특성에 관한 연구

  • Kim, Dong-Han (Department of Food and Nutrition, Mokpo National University) ;
  • Rhim, Jong-Whan (Department of Food Engineering, Mokpo National University) ;
  • Lee, Sang-Bok (National Honam Agricultural Experimental Station, R.D.A.)
  • Published : 2003.02.01

Abstract

Physicochemical properties and mineral compositions of seaweed salts prepared with various seaweeds and concentrated sea water were determined. Ash content of sea mustard was highest (22.7%) and that of laver the lowest (9.8%). Sea mustard contained high amount of Na, while sea tangle and seaweed fusiforme contained high amounts of K and Ca. When insoluble solids were removed after incineration of dried salt, surface color of the salt whitened more due to increase in salt purity with resulting decreases in pH and oxidation-reduction potential (ORP), pH and ORP of the ashed salt decreased, and K and Ca contents increased, while Mg content decreased. Yield of seaweed salt was the highest in sea mustard, ORP was lowest in sea tangle and seaweed fusiforme, and K and Ca contents increased significantly in sea tangle and seaweed fusiforme salts. As the concentration of sea water increased, yield and purity of the salts increased with decrease in pH and ORP and increase in Ca and Mg contents. Seaweed salt showed the characteristic crystalline structure as viewed by SEM.

해조류와 소금물을 이용하여 해조소금을 제조하고 이화학적 특성과 무기성분을 비교하였다. 해조소금 제조에 사용한 해조류의 회분함량은 미역이 22.78%로 많았고 김이 9.81%로 적었으나 무기성분으로 미역은 Na함량이 많은 반면 다시마와 톳은 K와 Ca가 많았다. 건조만 한 소금을 회화시켜 물불용해성분을 제거하면 소금의 순도가 증가하여 색이 밝아졌으며 pH와 ORP가 저하하였고, K와 Ca함량은 증가하나 Mg가 감소하였다. 해조소금의 수율은 미역소금에서 높았고 ORP는 다시마와 톳소금에서 낮았으며, K와 Ca함량은 미역소금에 비하여 다시마와 톳소금이 현저히 많았다. 해조소금 제조시 소금물의 농도가 증가하면 소금의 수율과 순도는 증가하나 pH는 저하하였고, ORP와 Ca, Mg함량이 증가하였다. 해조소금을 SEM에 의해 표면관찰 한 바 소금의 외형이 작고 특징적인 결정구조를 보였다.

Keywords

References

  1. Lee, j.E. Salt and hypertension. Korean J. Nephrol. 11, Suppl. 6: 56-60 (1992)
  2. Park, R.S., Kim, S.J. and Lee, L.H. Survey on sodium content of low salt diet at 27 hospitals. Korean J. Nutr. 10: 38-43 (1977)
  3. Chung, K.R. A survey on the sodium chloride content of common restaurant meals in Seoul area. Korean J. Food Sci. Technol. 19: 475-479 (1987)
  4. Ha, J.O. and Park, K.Y. Comparison of autooxidation rate and comutagenic effect of different kinds of salt. J. Korean Associ. Cancer Prev. 4: 44-51 (1999)
  5. Yang, J.S., Kim, O.H., Chung, S.Y., Yoo, T.M., Roh, Y.N., Yi, S.Y., Chung, M.W., Ahn, M.R., Choi, H.J. and Rheu, H.M. Pharmacological evalutation of bamboo salt. J. Appl. Pharm. 7: 178-184 (1999)
  6. Shin, M.S. and Lee, H.S. The properties of Salts and their effects on salts vegetables. J. Korean Home Economic Associ. 21: 55-63 (1983)
  7. Kim, S.D. Salting and fermentation of kimchi. J. Food Sci. Technol. 9:187-196 (1997)
  8. Shin, D.H., Jo, E.J. and Hong, J.S. Chemical composition of improted table salts and kimchi preparation test. J. Food Hyg. Safety 14: 277-281 (1999)
  9. Park, S.J., Park, K.Y. and Jun, H.K. Effects of commercial salts on the growth of kimchi-related microorganisms. J. Korean Soc. Food Sci. Nutr. 30: 806-813 (2001)
  10. Park, M.W. and Park, Y.K. Changes of physicochemical and sensory characteristics of oiji (Korean pickled cucumbers) prepared with different salts. J. Korean Soc. Food Sci. Nutr. 27: 419-424 (1998)
  11. Jeong, K.J. The production system of tol salt at Guom village in Cheju island. Geographical J. Korea 32: 87-104 (1998)
  12. Jo, E.J. and Shin, D.H. Study on the chemical compositions of sun-dried, refined, and processed salt produced in Chonbuk area. J. Food Hyg. Safety 13: 360-364 (1998)
  13. Park, J.W., Kim, S.J., Kim, S.H., Kim, B.H., Kang, S.K., Nam, S.H. and Jung, S.T. Determination of mineral and heavy metal contents of various salts. Korean J. Food Sci. Technol. 32: 1442-1445 (2000)
  14. Ha, J.O. and Park, K.Y. Composition of mineral contents and external structure of various salts. J. Korean Soc. Food Sci. Nutr. 27: 413-418 (1998)
  15. Korea Dietary Safety Civil Committee, The all about salts. International seminar on salt (Korea. China. Japan), pp. 1-33 (2000)
  16. Suphsorn, C., Ramu, M.R., Joseph, A.L. and Mahmood, A.K. Fatty acids and sensory acceptance of a dietary sodium-potassium fish sauce. J. Agric. Food Chem. 31: 14-17 (1987)
  17. The ministry of health and welfare, Food standard code, Seoul (2000)
  18. AOAC. Official Method of Analysis. 16th ed. Association of Official Analytical Chemists, Washington, DC, USA (1995)
  19. Kang, M.H., Kim. Y.B. and Lee, S.R. Digestibility of some Korean seaweeds through an animal experiment. Korean J. Nutr. 9: 69-75 (1976)