Non-destructive determination of total nitrogen in plants by diffuse reflectance near infrared spectroscopy

Química Nova

Andrade, João Carlos de¹  Poppi, Ronei J.¹  Trevisan, Marcello G.¹  Lima, Kássio M. G.¹  Universidade Estadual de Campinas, Campinas, Brasil¹ 

关键词: total nitrogen;    near-infrared diffuse reflectance;    teaching activity.;   

DOI  :  10.1590/S0100-40422008000300039

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Diffuse reflectance near-infrared (DR-NIR) spectroscopy associated with partial least squares (PLS) multivariate calibration is proposed for a direct, non-destructive, determination of total nitrogen in wheat leaves. The procedure was developed for an Analytical Instrumental Analysis course, carried out at the Institute of Chemistry of the State University of Campinas. The DR-NIR results are in good agreement with those obtained by the Kjeldhal standard procedure, with a relative error of less than ± 3% and the method may be used for teaching purposes as well as for routine analysis.

【 授权许可】

Unknown