连续流动分析仪快速测定甘蔗植株全氮、全磷含量

为快速、准确测定甘蔗植株全氮、全磷含量,采用对比法,探讨连续流动分析仪测定甘蔗植株全氮、全磷含量的适用性和稳定性。结果表明,连续流动仪测定全氮、全磷标准溶液线性良好,相关系数(R2)均达0.9998以上;检出限均为0.01 mg/L,标准偏差分别在0.48%~0.68%、0.23%~0.63%之间,加标回收率分别为93.00%~106.44%、93.33%~109.00%;与常规法相比,利用连续流动分析仪测定甘蔗植株全氮、全磷含量的结果均在允许偏差范围内,说明利用连续流动分析仪快速测定甘蔗植株全氮、全磷是可行的。

Rapid Determination of Nitrogen and Phosphorus in Sugarcane by Continuous Flow Analyzer

In order to determine total nitrogen content (N) and total phosphorus content (P) in sugarcane quickly and accurately,the comparison experiments were conducted to study the applicability and stability of N contents and P contents in sugarcane determined by continuous flow analyzer.The results showed good linear regression with correlation coefficient over 0.9998.The method detection limits were both 0.01 mg/L.The precision RSD ranged from 0.48％ to 0.68％ of N contents and from 0.23％ to 0.63％ of P contents.The recovery rate was 93％～106.4％ and 93.3％～109％,respectively.Compared with the conventional methods,the results of the determination of N contents and P contents in sugarcane by continuous flow analyzer were in the range of allowable deviation.This study explains that the rapid determination method of N contents and P contents in sugarcane by continuous flow analyzer is available.