2WHO/UNICEF/ICCIDD. Consultation recommended iodine levels in salt and guidelines for monitoring their adequacy and effectiveness [J]. IDD Newsletter, 1997, 13:10-11.
3Pino S, Fang SL, Braverman LE. Ammunium persulfate:a new and safe method for measuring urinary iodine by ammonium persulfate oxidation. Exp Clin Endocrinol Diabetes, 1998,106(suppl 3):22-27.
4Sullivan KM, May S, Maberly GM. Urinary Iodine assessment:a manual on survey and laboratory methods. 2nd. Atlanta (USA):PAMM/UNICEF, 2000. 35-45.
5ICCIDD, UNICEF, WHO. Assessment of iodine deficiency disorders and monitoring their elimination: a guide for programme managers.Geneva,WHO/NHD, 2001, 73-75.