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本文对浑浊的土壤水浸液必须使用的澄清剂进行了选择确定。对于澄清液在NO-对氨基苯磺酸-a荼胺显色体系中所表现出来的增敏作用做出较全面的深入研究。ε值由4．60×104提高到1．28×105,应用于样品分析，SRD＝1.34。
This paper clarifies the clarifying agent that must be used in turbid soil water infusions. A more comprehensive and in-depth study of the sensitizing effect of the clarification solution in the NO-sulfanilic acid-amyl amine chromogenic system was carried out. The ε value increased from 4.60 × 104 to 1.28 × 105 and was applied to the sample analysis with SRD = 1.34.