有机无机复混肥中有机质含量的测定

Determination of Organic Carbon in Organic-Inorganic Compound Fertilizers

用重铬酸钾氧化法测定有机无机复混肥中有机质的含量 ,为消除测定过程中尿素中碳的干扰 ,确定了实验条件 :重铬酸钾溶液的浓度 0 .8mol/ L,用量 5 m L,浓硫酸用量 5 m L,加热温度控制在 10 0℃ ,加热时间 15 min～ 2 0

Determination of Organic carbon in organic-inorganic compound fertilizers by potassium dichromate oxidation titration,in order to overcome the interference of carbon in urea,the test showed it was silitable when the heating temperature is controlled at 100℃,the consistency and the volume of potassium dichromate is 0.8 mol/L and 5 mL,the volume of sulphuric acid is 5 mL,and the time is controlled in 15 min～20 min.