论文部分内容阅读
采用JH - 12型COD恒温加热器消解土壤样品 ,测定其有机质含量 .通过对样品消解温度、沸腾消解时间的实验设计 ,确定样品消解温度为 175℃ ,沸腾消解时间为 5min .实验样品的平均含量与外检结果相比 ,其相对偏差仅为 0 .8% .在本实验条件下 ,对广西区内 6 5个土壤样品进行了测试 ,经随机抽查 ,相对偏差均小 5 % ,与经典的油浴加热法相比 ,该方法方便、快捷 ,减少了环境污染 ,提高了劳动效率
The soil sample was digested with JH - 12 COD constant temperature heater and the content of organic matter was determined.The digestion temperature and the digestion time of the sample were determined to be 175 ℃ and 5 min by experimental design of the sample digestion temperature and boiling digestion time.The average content of the experimental samples Compared with the results of the inspection, the relative deviation was only 0.8% .Through this test, 65 soil samples were tested in Guangxi area. After random sampling, the relative deviation was 5% Compared with the oil bath heating method, the method is convenient and fast, reduces the environmental pollution and improves the labor efficiency