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Improved determination efficiency of the cation exchange capacity and exchangeable base cations in soil using stirring and extraction modifications
Soil and Tillage Research ( IF 6.1 ) Pub Date : 2025-01-15 , DOI: 10.1016/j.still.2024.106429
Jinhua Yuan, Shengzhe E, Xinnan Zhao
Soil and Tillage Research ( IF 6.1 ) Pub Date : 2025-01-15 , DOI: 10.1016/j.still.2024.106429
Jinhua Yuan, Shengzhe E, Xinnan Zhao
The hexamminecobalt trichloride ([Co(NH3 )6 ]Cl3 ) method extracts exchangeable (exch.) base cations needing 60 min. For soils containing calcium carbonate, a calcite saturated [Co(NH3 )6 ]Cl3 solution is used to determine the exch. Ca. The preparing time of calcite saturated [Co(NH3 )6 ]Cl3 solution requires to set overnight. This study evaluated the equivalence of [Co(NH3 )6 ]Cl3 method using stirring modification. The proposed modification can vastly save time and the whole extraction time can be shortened to 3–5 min. The preparing calcite saturated [Co(NH3 )6 ]Cl3 solution procedure can be omitted when measured soils containing calcium carbonate. For acidic soil, the measured CEC was below the certified range, the exch. Ca, Na and K were all in the certified value range; the exch. Mg above the certified range. For neural soil, the measured CEC, exch. Ca, Mg, Na and K were all in the certified range. For alkaline soil, the measured CEC was above the certified range, the exch. Ca, Mg, Na and K were all in the certified range. For saline soil, the measured CEC was above the certified range, the exch. Mg and K below the certified range; accurate exch. Ca and Na could not be achieved even in such a short extraction time because of the dissolution of gypsum and sodium salts. For sodic soil, the measured CEC was above the certified range, the exch. Mg and K below the certified range; the extracted Ca can be assumed the exch. Ca; the exch. Na can be calculated as CEC-(exch. Ca + exch. Mg + exch. K). The difference of CEC between measured and certified values were mainly because of the discrepancy of extractant pHs. The addition of CaCO3 (≤ 80 %) had no effect on CEC or exch. base cations’ determinations. The CaCO3 and CaSO4 ∙2 H2 O combination only affected the determination of exch. Ca.
中文翻译:
使用搅拌和萃取改性提高土壤中阳离子交换容量和可交换碱阳离子的测定效率
六胺钴三氯化物 ([Co(NH3)6]Cl3) 方法提取可交换(exch.)碱阳离子,需要 60 分钟。对于含有碳酸钙的土壤,使用方解石饱和 [Co(NH3)6]Cl3 溶液来确定 exch. Ca.方解石饱和 [Co(NH3)6]Cl3 溶液的制备时间需要过夜。本研究评价了使用搅拌改性的 [Co(NH3)6]Cl3 方法的等效性。建议的修改可以大大节省时间,并且整个提取时间可以缩短到 3-5 分钟。当测量含有碳酸钙的土壤时,可以省略制备方解石饱和 [Co(NH3)6]Cl3 溶液程序。对于酸性土壤,测得的 CEC 低于认证范围,外径 Ca、Na 和 K 均在认证值范围内;埃奇。Mg 高于认证范围。对于神经土壤,测得的 CEC 、 exch. Ca、Mg、Na 和 K 均在认证范围内。对于碱性土壤,测得的 CEC 高于认证范围,外径 Ca、Mg、Na 和 K 均在认证范围内。对于盐渍土壤,测得的 CEC 高于认证范围 exch。Mg 和 K 低于认证范围;精确 Exch.由于石膏和钠盐的溶解,即使在如此短的提取时间内也无法获得 Ca 和 Na。对于钠质土壤,测得的 CEC 高于认证范围 exch。Mg 和 K 低于认证范围;提取的 Ca 可以假定为 exch。钙;埃奇。Na 可以计算为 CEC-(exch. Ca + exch. Mg + exch. K)。实测值与认证值之间的 CEC 差异主要是由于萃取剂 pH 值的差异。添加 CaCO3 (≤ 80%) 对 CEC 或外显基阳离子的测定没有影响。CaCO3 和 CaSO4∙2 H2O 组合仅影响 exch 的测定。卡。
更新日期:2025-01-15
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
使用搅拌和萃取改性提高土壤中阳离子交换容量和可交换碱阳离子的测定效率
六胺钴三氯化物 ([Co(NH3)6]Cl3) 方法提取可交换(exch.)碱阳离子,需要 60 分钟。对于含有碳酸钙的土壤,使用方解石饱和 [Co(NH3)6]Cl3 溶液来确定 exch. Ca.方解石饱和 [Co(NH3)6]Cl3 溶液的制备时间需要过夜。本研究评价了使用搅拌改性的 [Co(NH3)6]Cl3 方法的等效性。建议的修改可以大大节省时间,并且整个提取时间可以缩短到 3-5 分钟。当测量含有碳酸钙的土壤时,可以省略制备方解石饱和 [Co(NH3)6]Cl3 溶液程序。对于酸性土壤,测得的 CEC 低于认证范围,外径 Ca、Na 和 K 均在认证值范围内;埃奇。Mg 高于认证范围。对于神经土壤,测得的 CEC 、 exch. Ca、Mg、Na 和 K 均在认证范围内。对于碱性土壤,测得的 CEC 高于认证范围,外径 Ca、Mg、Na 和 K 均在认证范围内。对于盐渍土壤,测得的 CEC 高于认证范围 exch。Mg 和 K 低于认证范围;精确 Exch.由于石膏和钠盐的溶解,即使在如此短的提取时间内也无法获得 Ca 和 Na。对于钠质土壤,测得的 CEC 高于认证范围 exch。Mg 和 K 低于认证范围;提取的 Ca 可以假定为 exch。钙;埃奇。Na 可以计算为 CEC-(exch. Ca + exch. Mg + exch. K)。实测值与认证值之间的 CEC 差异主要是由于萃取剂 pH 值的差异。添加 CaCO3 (≤ 80%) 对 CEC 或外显基阳离子的测定没有影响。CaCO3 和 CaSO4∙2 H2O 组合仅影响 exch 的测定。卡。