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研究和配制了一种甲醛合次硫酸氢钠和亚硫酸钠的混合液作为水中微量硅（硅钼蓝）光度法测定的还原剂，其还原能能力、稳定性、准确度均较好，适用于多种水源中微量硅的测定。
A mixture of sodium formaldehyde sulfoxylate and sodium sulfite was studied and formulated as a reductant for the determination of trace silicon (molybdenum blue) in water. The reductant has good reduction ability, stability and accuracy, and is suitable for many Determination of trace silicon in water.