摘要 为了获取经济且高效的测定有机肥中磷和钾含量的方法,通过优化样品前处理消化过程和仪器测试条件,分析测定方法的检出限、精密度和准确度,以及进行方法比对,评估了利用电感耦合等离子体发射光谱仪(ICP-AES)同时测定有机肥中磷和钾方法的有效性和准确度。结果表明,该方法能够同时高效、准确测定有机肥中磷和钾含量;所得磷和钾标准曲线的线性相关系数R2>0.999,磷和钾测定方法检出限分别为7.5和6.0μg/L,不同有机肥样品磷和钾测定结果的相对标准偏差均小于2.0%,不同浓度下基体加标回收率达98.9%~100.5%。因此,利用ICP-AES同时测定有机肥中磷和钾完全可以替代国家农业标准测定有机肥中钾和磷含量的方法。 To explore an economical and effective method to determine the phosphorus(P)and potassium(K)contents in organic fertilizer,an optimization of the digesting method and instrument test conditions during the sample pretreatment was presented,and the detection limit,precision,accuracy and methods comparison were analyzed to evaluate the effectiveness and accuracy of this new determination method.The method uses Inductively Coupled Plasma-Atomic Emission Spectrum(ICP-AES)to simultaneously determine the P and K contents in organic fertilizer.The results showed that this method could efficiently and accurately determine both the P and K contents in organic fertilizer at the same time.The linear correlation coefficient(R2)of the P and K standard curves was above 0.999,the detection limits of P and K were 7.5 and 6.0μg/L by ICP-AES,respectively,the relative standard deviations of the P and K measurements from different organic fertilizer samples were less than 2.0%,and the standard recovery of different concentrations of substrates reached 98.9%~100.5%.
机构地区 江西省分析测试研究所 江西省科学院鄱阳湖研究中心
出处 《实验室研究与探索》 CAS 北大核心 2021年第4期51-54,86,共5页 Research and Exploration In Laboratory
基金 国家自然科学基金项目(41867002) 江西省重点研发项目(20202BBFL63048) 江西省科技创新杰出青年人才项目(20192BCB23026) 江西省青年科学基金重点项目(20171ACB21069) 江西省科学院博士基金(2017-YYB-01) 江西省科学院普惠制项目(2017-XTPH1-01)。
关键词 有机肥 磷含量 钾含量 电感耦合等离子体发射光谱 高效检测方法 organic fertilizer phosphorus content potassium content inductively coupled plasma-atomic emission spectrum effective detection method
