Optimisation of focused-microwave assisted digestion procedure for Kjeldahl nitrogen determination in bean samples by factorial design and Doehlert design.

@article{Korn2005OptimisationOF,
  title={Optimisation of focused-microwave assisted digestion procedure for Kjeldahl nitrogen determination in bean samples by factorial design and Doehlert design.},
  author={Maria Graças Andrade Korn and Wagna P C Dos Santos and Mauro Korn and S{\'e}rgio Lu{\'i}s Costa Ferreira},
  journal={Talanta},
  year={2005},
  volume={65 3},
  pages={
          710-5
        }
}
In the present paper a focused-microwave Kjeldahl digestion procedure without metal catalyst for nitrogen determination in bean samples was developed. Temperature at which the decomposition plateau occurs, mass of potassium sulphate and either volume of sulphuric acid or hydrogen peroxide were optimised. Results of the two-level full factorial design (2(4)) based on an analysis of variance demonstrated that only the decomposition plateau temperature and the sulphuric acid volume were… CONTINUE READING
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