方法：采用WHO与ICCID制定的《碘缺乏病防治标准与方法》中的硫酸铈法。
Methods: the cerous sulfate reducing reaction was used according to the preventive and curative criteria of iodine deficiency drawn up by WHO and ICCIDD.
用硫酸铈作氧化剂，通过液相法将普通的天然石墨进行氧化改性。
General natural graphite was modified by liquid-phase oxidation method using cerium sulfate as an oxidant.
为探讨铝阳极氧化沉积铈转化膜形成机理，分别用化学沉积和电沉积法在铝阳极氧化膜上制备了铈转化膜。
Cerium conversion films were prepared on anodized aluminum via chemical deposition and electrodeposition respectively, and the mechanisms of formation of the cerium conversion films were investigated.
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