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本方法适用于含腐植酸的原料及各种腐植酸产品。 3.1 碳和氢的测定 3.1.1 方法原理 取一定量的试样在氧气流中燃烧,生成的水和二氧化碳分别用吸水剂和二氧化碳吸收剂吸收,由吸收剂的增重计算试样中的碳和氢的含量。试样中硫和氯对测定的干扰在三节炉中用铬酸铅和银丝卷除去,在二节炉中用高锰酸银热解产物除去,氮对碳测定的干扰由粒状二氧化锰除去。可以采用三节炉或两节炉进行测定。
This method is suitable for raw materials containing humic acid and a variety of humic acid products. 3.1 Determination of carbon and hydrogen 3.1.1 Principle of the method Take a certain amount of sample combustion in the oxygen stream, the generated water and carbon dioxide were absorbed with water absorbent and carbon dioxide absorbent, calculated from the weight of the absorbent carbon in the sample And hydrogen content. Interferences in the determination of sulfur and chlorine in the sample were removed with lead chromate and silver coils in a three-stage furnace and removed with pyrithione permanganate in a two-stage furnace. The interference of the nitrogen on the carbon determination was determined by the particulate manganese dioxide Remove. Can be used three-furnace or two-furnace determination.