Abstract
AT the request of the Health Organisation of the League of Nations, the Board of Trustees of the United States Pharmacopoeia has consented to make generally available the standard cod-liver oils, prepared for use in the United States as secondary standards for vitamins A and D. The distribution of these oils will not be made through the national distributing centres as in the case of the primary vitamin standards, but direct to individual users. They may be obtained from Mr. E. Fullerton Qook, Chairman of the Committee of Revision of the U.S. Pharmacopoeia, 43rd Street and Woodland Avenue, Philadelphia, Pa., U.S.A. It should be clearly stated whether vitamin A oil or vitamin D oil is required. A charge of 2.50 dollars is made for containers holding 30 c.c. A sum to cover the cost of the quantity required should be sent by international money order with the application. The oils will be sent post paid to their destinations. These reference oils are checked each six months biologically against the international standards by at least six laboratories, and their potency should therefore be increasingly dependable. Secondary standards of vitamins A and D are of considerable importance to British users, as it has not been possible to supply the primary international standards of these vitamins in quantities sufficient to enable them to be used for routine assays.
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Vitamin Standards. Nature 136, 97 (1935). https://doi.org/10.1038/136097b0
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DOI: https://doi.org/10.1038/136097b0