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The composition of tea infusions examined in relation to the association between mortality and water hardness

Published online by Cambridge University Press:  15 May 2009

W. Anderson ,
J. G. Hollins  and
Pamela S. Bond
W. Anderson
Affiliation:
Department of Physics, Institute of Cancer Research, Clifton Avenue, Belmont, Sutton, Surrey
J. G. Hollins
Affiliation:
Department of Physics, Institute of Cancer Research, Clifton Avenue, Belmont, Sutton, Surrey
Pamela S. Bond
Affiliation:
Department of Physics, Institute of Cancer Research, Clifton Avenue, Belmont, Sutton, Surrey
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Recent epidemiological studies have shown that death-rates from certain chronic diseases are higher in areas with soft than in areas with hard drinking-water. In the striking negative correlation found in the county boroughs of England and Wales between cardiovascular mortality and water hardness the important underlying factor is apparently the water calcium. Interest is therefore focused on the dietary significance of calcium present in drinking-water. In relation to that interest, the present report gives a quantitative account of the composition of tea infusions prepared with waters containing different amounts of calcium. It is shown that a substantial part of water calcium is taken up by the tea leaf during the preparation of infusions. The analysis of the infusions covers a wide range of individual components, including trace metals and polyphenolic substances. It appears that the principal change caused in infusion composition by the presence of calcium in the water is a substantial reduction in the relatively high oxalate content. The question is raised whether there may be some connexion between the ‘ water factor’ in cardiovascular disease and the absorption of oxalates from foods.

Type
Research Article
Information
Journal of Hygiene , Volume 69 , Issue 1 , March 1971 , pp. 1 - 15
Copyright
Copyright © Cambridge University Press 1971

References

REFERENCES

Anderson, W. (1964). In Annual Report of British Empire Cancer Campaign, pt. II, p. 94. London.Google Scholar
Baker, C. J. L. (1952). The determination of oxalates in fresh plant material. Analyst 77, 340.CrossRefGoogle Scholar
Bau, A. (1920). The determination of oxalic acid in tea, coffee, marmalade, vegetables and bread. Zeitschrift für Untersuchung der Nahrungs und Genussmittel sowie der Gebrauchs-gengenstände 40, 50.CrossRefGoogle Scholar
Biörck, G., Boström, H. & Widström, A. (1965). On the relationship between water hardness and death rate in cardiovascular diseases. Acta medica scandinavica 178, 239.CrossRefGoogle ScholarPubMed
Bronner, F. (1964). Dynamics and function of calcium. In Mineral Metabolism, vol. 2A, p. 425. Ed. Comar, C. L. and Bronner, F.. New York: Academic Press.Google Scholar
Campbell, I. R., Cass, J. S., Cholak, J. & Kehoe, R. A. (1957). Aluminium in the environment of man. A.M.A. Archives of Industrial Health 15, 359.Google ScholarPubMed
Chow, T. J. & Thompson, T. G. (1955). Flame photometric determination of calcium in sea water and marine organisms. Analytical Chemistry 27, 910.CrossRefGoogle Scholar
Crawford, M. D., Gardner, M. J. & Morris, J. N. (1968). Mortality and hardness of local water-supplies. Lancet i, 827.CrossRefGoogle Scholar
Davies, D. J. (1962). Hardness of local water supplies and mortality from cardiovascular disease. Lancet ii, 882.CrossRefGoogle Scholar
Hollingsworth, D. F. (1956). Nutritional requirements and food fortification: Dietary supplies of calcium and iron. Chemistry and Industry (London), p. 1510.Google Scholar
Hollins, J. G. (1965). Flame spectrophotometric studies of materials of biological interest. Ph.D. thesis, University of London.Google Scholar
Hoover, A. A. & Karunairatnam, M. C. (1945). Oxalate content of some leafy green vegetables and its relation to oxaluria and calcium utilisation. Biochemical Journal 39, 237.CrossRefGoogle Scholar
Jacobs, M. B. (1958). Chemical Analysis of Foods and Food Products, 3rd edn., p. 632. Princeton: Van Nostrand.Google Scholar
Jeghers, H. & Murphy, R. (1945). Practical aspects of oxalate metabolism. New England Journal of Medicine 233, 208–15 and 238–46.CrossRefGoogle Scholar
Kaiser, H. E. (1967). Cancer promoting effects of phenols in tea. Cancer 20, 614.3.0.CO;2-N>CrossRefGoogle ScholarPubMed
Kertesz, Z. I. (1951). The Pectic Substances. New York: Interscience.Google Scholar
Kirby, K. S. (1960). Induction of tumours by tannin extracts. British Journal of Cancer 14, 147.CrossRefGoogle ScholarPubMed
Kobayashi, J. (1957). On the geographical relationship between the chemical nature of river water and death-rate from apoplexy. Bericht des Ohara Instituts für landwirtschaftliche Forschungen, Okayama Universität 11, 12.Google Scholar
Kohman, E. F. (1939). Oxalic acid in foods and its behaviour and fate in the diet. Journal of Nutrition 18, 233.CrossRefGoogle Scholar
Korpassy, B. (1961). Tannins as hepatic carcinogens. In Progress in Experimental Tumour Research, vol. 2, pp. 245–290. Ed. Homburger, F., Basel: Karger.Google Scholar
Mccance, R. A. & Widdowson, E. M. (1935). Phytin in human nutrition. Biochemical Journal 29, 2694.CrossRefGoogle ScholarPubMed
Mccance, R. A. & Widdowson, E. M. (1956). The Chemical Composition of Foods. Medical Research Council Report, no. 235, 2nd edn., p. 95. H.M.S.O.Google Scholar
Middleton, G. & Stuckey, R. E. (1954). The preparation of biological material for the determination of trace metals. Part II. A method for the destruction of organic matter in biological material. Analyst 79, 138.CrossRefGoogle Scholar
Monier-Williams, G. W. (1949). Trace Elements in Food. London: Chapman and Hall.CrossRefGoogle Scholar
Morris, J. N., Crawford, M. D. & Heady, J. A. (1961). Hardness of local water-supplies and mortality from cardiovascular disease. Lancet i, 860.CrossRefGoogle Scholar
Morris, J. N., Crawford, M. D. & Heady, J. A. (1962). Hardness of local water-supplies and mortality from cardiovascular disease. Lancet ii, 506.CrossRefGoogle Scholar
National Food Survey Committee (1967). Annual Report on Household Food Consumption and Expenditure: 1965. H.M.S.O.Google Scholar
Nordin, B. E. C. & Hodgkinson, A. (1967). Urolithiasis. Advances in Internal Medicine 13, 155.Google ScholarPubMed
Pearson, D. (1962). The Chemical Analysis of Foods, pp. 21, 33. London: Churchill.Google Scholar
Polzella, L. (1961). Spectrophotometric determination of caffeine in roasted coffee. Bolletino dei Laboratori chimici provinciali, Bologna 12, 23.Google Scholar
Roberts, E. A. H., Cartwright, R. A. & Oldschool, M. (1957). The phenolic substances of manufactured tea. I. Fraetionation and paper chromatography of water-soluble substances. Journal of the Science of Food and Agriculture 8, 72.CrossRefGoogle Scholar
Sandell, E. B. (1959). Colorimetric Determination of Trace Metals. p. 252. New York, Interscience.Google Scholar
Schroeder, H. A. (1960). Relation between mortality from cardiovascular disease and treated water supplies. Journal of the American Medical Association 172, 1902.CrossRefGoogle ScholarPubMed
Schroeder, H. A. (1966). Municipal drinking water and cardiovascular death rates. Journal of the American Medical Association 195, 81.CrossRefGoogle ScholarPubMed
Schroeder, H. A., Balassa, J. J. & Tipton, I. H. (1966). Essential trace metals in man: manganese. Journal of Chronic Diseases 19, 545.CrossRefGoogle ScholarPubMed
Skeat, W. O. (1961). Manual of British Water Engineering Practice 3rd edn.Cambridge: Heffer.Google Scholar
Smith, R. F. & Rees, D. I. (1963). The Spectrophotometric determination of caffeine in coffee and tea products, with special reference to coffee and chicory mixtures. Analyst 88, 310.CrossRefGoogle Scholar
Taylor, E. W. (1958). The Examination of Waters and Water Supplies, 7th edn.London: Churchill.CrossRefGoogle Scholar
Turner, R. C. (1962). Radioactivity and hardness of drinking waters in relation to cancer mortality rates. British Journal of Cancer 16, 27.CrossRefGoogle ScholarPubMed
Underwood, E. J. (1962). Trace Elements, 2nd edn.New York: Academic Press.Google Scholar
Vuataz, L. & Brandenberger, H. (1961). Plant phenols. III. Separation of fermented and black tea polyphenols by cellulose column chromatography. Journal of Chromatography 5, 17.CrossRefGoogle Scholar
Wacker, W. E. C. & Vallee, B. L. (1964). Physiology of magnesium. In Mineral Metabolism, vol. 2A, p. 493. Ed. Comar, C. L. and Bronner, F.. New York: Academic Press.Google Scholar