摘要
用聚四氟乙烯生料带密封容器,利用微波加热技术在较高温度和压力下浸提和消解风化煤样品中的游离腐植酸,样品不污染环境,也不被环境污染,测定的精密度和准确度高,与标准方法对照,测定速度提高数十倍,分析结果没有显著性差异,结论的置信度为95％。
A new microwave heating method has been studide for rapid determination of free humic acid in weathered coal samples. A small amount of sample solution (5.00ml) was digested with potassium dichtomate method in closed--conical flask by using microwave heating for 5 min after sample extracted under pressure. This method is simple, save reagent, save time and accurate. Nineteen samples can be ex- tracted (or digested) in every time test. The analtical results are satisfactory as compared with standard method.
出处
《河南科学》
1993年第4期269-273,共5页
Henan Science
关键词
游离腐植酸
风化煤
微波加热
Free humic acid
Weathered coal
Microwave-Heating
Digestion method under pressure
