Determinação não destrutiva do nitrogênio total em plantas por espectroscopia de reflectância difusa no infravermelho próximo

Química Nova

Kássio M. G. Lima¹  Marcello G. Trevisan¹  Ronei J. Poppi¹  João Carlos De Andrade¹ 

[1] ,Universidade Estadual de Campinas Instituto de Química Campinas SP ,Brasil

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

DOI  :  10.1590/S0100-40422008000300039

来源: SciELO

【 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】

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