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一、方法原理这个方法是根据用一定量已知浓度的稀盐酸处理土壤,一部分H~+离子与土壤吸收性块基进行着当量的交换作用;而中和了一部分酸,所剩余的酸用标准硷液滴定,由其前后之差计算盐基总量.根据我们对江汉平原土壤分析结果,证明用0.02～0.03NHCl处理土壤,结果与醋酸铵淋洗法是一致的.有些支献上介绍用0.05HCI处理土壤,经我们用此法试验,记为对土壤胶体(尤其是有机胶体)是有破坏作用的.用盐酸测定土壤武验结果:
First, the method principle This method is based on a certain amount of dilute hydrochloric acid with a known concentration of soil treatment, a part of H ~ + ions and the soil absorbable block base for equivalent exchange; and part of the acid neutralization, the remaining acid Standard alkalinity titration and calculate the total amount of salt base from the difference between its front and back.According to our analysis of soil in Jianghan Plain, it is proved that the treatment of soil with 0.02 ~ 0.03NHCl is consistent with the ammonium acetate leaching method. 0.05HCI treatment of soil, by our use of this test, recorded as soil colloids (especially organic colloids) is to have a damaging effect. Determination of soil with hydrochloric acid Wu test results: