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研究了在稀盐酸介质中，银催化氯化物还原铈（Ⅳ）而使其褪色的反应，建立了测定痕量银（Ⅰ）的新方法。测定银（Ⅰ）的线性范围为０～４０μｇ／Ｌ，检出限为５．７×１０－ ７ｇ／Ｌ。方法用于环境水样中痕量银的测定，结果满意。
A new method for the determination of trace silver (Ⅰ) was developed by diluting cerium (Ⅳ) with silver chloride in diluted hydrochloric acid. The linear range of silver (Ⅰ) was 0 ~ 40μg / L and the limit of detection was 5.7 × 10-7g / L. The method was applied to the determination of trace silver in environmental water samples with satisfactory results.