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Comparison of methods for analyzing organic matter in organic materials

Ruiz-Dager M;
Cori CEC;
Sosa F;
Aular LM;
Mora R;
Castillo LC;
Ortega B;
Castillo E;
Ramirez-Iglesias E;
Rodriguez J;
León M;
Sequera CS;
Tovar MR;
Martinez A;
Reverón AM;
Gámez F

Magaly Ruiz-Dager

Carmen E. Carrillo de Cori

Francisca Sosa

Linda M. Aular

Rosalba Mora

Luis Castillo Castillo

Bethsaida Ortega

Egli Castillo

Elizabeth Ramirez-Iglesias

Jesus Rodriguez

Marianela León

Carmen Silva Sequera

María R. Tovar

Ayuramy Martinez

Aura M. Reverón

Florencio Gámez


Resumen

Two methods (wet combustion and calcination at 550 ºC) for the determination of organic matter in organic materials were compared. Nine laboratories participated in the assay, using five organic materials (three composts and two substrates), analyzed in quadruplicate. The precision was evaluated by calculating the  repeatability and reproducibility, according to the COVENIN 2972-92 (ISO 5725-86) standard. No significant differences were found between methods, laboratories, or replicates, so it is assumed that the compared methods generate statistically equal results. The precision evaluated through repeatability and reproducibility was not dependent on the level of organic matter. The lower repeatability and reproducibility values obtained with the calcination method indicate that this analytical modality is more precise. The application of the calcination method is recommended because it is based on a fast, simple procedure, does not consume chemical reagents and does not generate toxic waste for the environment and health.

 

DOI:https://doi.org/10.56238/sevened2023.006-154


Creative Commons License

Esta obra está bajo una licencia internacional Creative Commons Atribución-NoComercial 4.0.

Derechos de autor 2023 Magaly Ruiz-Dager, Carmen E. Carrillo de Cori, Francisca Sosa, Linda M. Aular, Rosalba Mora, Luis Castillo Castillo, Bethsaida Ortega, Egli Castillo, Elizabeth Ramirez-Iglesias, Jesus Rodriguez, Marianela León, Carmen Silva Sequera, María R. Tovar, Ayuramy Martinez, Aura M. Reverón, Florencio Gámez

##plugins.themes.gdThemes.article.Authors##

  • Magaly Ruiz-Dager
  • Carmen E. Carrillo de Cori
  • Francisca Sosa
  • Linda M. Aular
  • Rosalba Mora
  • Luis Castillo Castillo
  • Bethsaida Ortega
  • Egli Castillo
  • Elizabeth Ramirez-Iglesias
  • Jesus Rodriguez
  • Marianela León
  • Carmen Silva Sequera
  • María R. Tovar
  • Ayuramy Martinez
  • Aura M. Reverón
  • Florencio Gámez