Determination of Nitrogen Fractions - Comments

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Determination of Nitrogen Fractions - Comments

• Ammonium and Nitrate

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Comments

• Pretreatment and losses of analytes
• Extraction conditions

• Reference to preatreatment
• study and interferences and
• errors
• Changed fresh samples
• extracted in one step in
• 1M KCl, different ratios for
• soil (15) and sludge and
• treated biowaste (120-180)
• Measure an aliquot of the
• filtrate or supernatant

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Other Comments

• Use of other extractants (AUST)
• water, CaCl2 (0,02M), 2,5 M KCl
• Dialysis step for purification from
• humic acids (NEN)
• Comparison to Recovery in prEN 14671 (FIN)

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Analysis in different matrices
 
  n 2
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Recovery in soilWEPAL soil, lt 2 mm
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Recovery in treated biowaste