沸水浴法测定土壤中的有机质

Determination of Soil Organic Matter by Boiling Water Bath

采用重铬酸钾氧化法水浴加热,在土壤样品中加入0.4 mol/L重铬酸钾-硫酸溶液,在水浴中分别加热45 min、55 min、70 min确定氧化校正系数为1.27。选取土壤标准样品和耕地提质改造样品进行水浴法试验,加热55 min,1.27的氧化校正系数,与标准油浴法比较,获得满意的结果。

The potassium dichromate oxidation method is used for water bath heating.0.4 mol/L potassium dichromate-sulfuric acid solution is added to the soil samples,and the oxidation correction coefficient is 1.27 after heating in the water bath for 45 min,55 min and 70 min,respectively.The water bath method was used to test the soil standard samples and the cultivated land quality improvement samples.The oxidation correction coefficient of 1.27 after heating for 55 min was compared with that of the standard oil bath method.Satisfactory results were obtained.