An investigation on laboratory and field methods of determining the pH of soil suspensions
An investigation on laboratory and field methods of determining the pH of soil suspensions
复制标题
测定土壤悬浮液 pH 值的实验室和现场方法研究
DOI：
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发表时间：
1972
期刊：
影响因子：
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通讯作者：
E. Farr
中科院分区：
文献类型：
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作者：
E. Farr
将实验室pH计测量的土壤样品的pH值与现场使用比色指示剂溶液获得的pH值进行比较。在测试的指标中，BDH 土壤指示剂和溴甲酚紫与 pH 值 3.8 至 7.8 土壤的实验室结果进行了最接近的总体比较。溴甲酚绿仅在有限范围（小于 5.2）内有用。程序和分析的差异有时会产生补偿误差，但结果通常并不完全一致，并且任何给定土壤的差异幅度只能在相当宽泛的范围内预测——平均标准偏差为 0.34 个单位，现场测定的结果与实验室测定的结果有大约 75% 的机会在 0.3 个单位的范围内。
A comparison was made between the pH values of soil samples, measured with a pH meter in the laboratory, and those obtained by using colorimetric indicator solutions in the field. Of the indicators tested, BDH Soil Indicator and bromocresol purple provided the closest overall comparison with laboratory results for soils with pH values from 3.8 to 7.8. Bromocresol green was useful only over a limited range (less than 5.2). Differences in procedure and analysis sometimes produced compensatory errors but the results did not often agree exactly and the magnitude of the discrepancy for any given soil was predictable only within fairly broad limits—the average standard deviation was 0.34 units and there was about a 75% chance of the result determined in the field being within 0.3 units of the result determined in the laboratory.