常规火焰光度法测定复混肥中氧化钾的方法改进

火焰光度法测定复混肥中K2O含量,由于标准溶液与待测溶液基体不一致,使测定结果重现性差,与重量法测定结果相差较大.为此,对方法进行了改进,采用基体一致,用已知K2O含量的复混肥(其氧化钾含量以重量法测定结果为准)作为标准溶液对仪器进行校准.大量的对照实验表明,此法所测K2O结果与重量法测定结果较吻合,且方法简单,快速,...

Improvement of determination of K2O in compound fertilizer production by flame photometry

For the different matrixes between standard solution and determined solution,the result of K2O content in compound fertilizer determined by flame photometry has a bad reproducibility,and with a big error compared with the result by gravimetric method.Using compound fertilizer with known K2O content as standard reference and calibrating the equipment with the standard solution prepared by the same matrix with determined solution,the results are consistent with the results by gravimetric method.The method is ...