5Stewart A G, Carter J, Parker A, Ailoway B J. The illusion of environmentaI iodine deficiency [J].Environmental Geochemistry and Health, 2003, 25:165 - 170.
7El-Attar H A, Jackson M L, Volk V V. Fluoride loss from silicates on ignition [J]. American Mineralogist, 1972, 57: 246-252.
8Brosnan D A. Technology and regulatory consequences of fluorine emissions in ceramic manufacturing[J]. American Ceramic Society Bulletin, 1992, 71:1798- 1802.
9Wu D, Deng H, Wang W, Xiao H. Catalytic spectrophotometric determination of iodine in coal by pyrohydrolysis decomposition [J]. Analytica Chimica Acta, 2007, 601 :183- 188.