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文章对土易溶盐的传统分析方法进行了一些改进,建立了ICP-AES测定土易溶盐中CaO、MgO、SO_4~(2-)的方法。方法线性范围CaO为0.1～40 mg/L;MgO为0.02～10 mg/L,SO_4~(2-)为0.2～100 mg/L。方法检出限CaO为0.022 4 mg/L,MgO为0.003 8 mg/L,SO_4~(2-)为0.0279 mg/L。精密度(RSD)CaO为0.99%,MgO为1.71%, SO_4~(2-)为1.66%。回收率(R)为96.0%～103.2%。
The paper made some improvements on the traditional analysis methods of soil soluble salts, and established a method for the determination of CaO, MgO and SO_4 ~ (2-) in soil-soluble salts by ICP-AES. The linear range of the method was 0.1-40 mg / L for CaO, 0.02-10 mg / L for MgO and 0.2-100 mg / L for SO 4 2-. The detection limits of the method were 0.022 4 mg / L CaO, 0.003 8 mg / L MgO and 0.0279 mg / L SO_4 2-. The precision of RSD was 0.99% for CaO, 1.71% for MgO and 1.66% for SO 4 2-. The recoveries (R) ranged from 96.0% to 103.2%.