Table 2.
Proximates and concentration of minerals and trace elements in five batches of the NF produced from plants cultivated in water kept in a pH range of 5.5–6.5
| Parameters | Unit | Batch | Method of analysis | ||||
|---|---|---|---|---|---|---|---|
| #6 | #7 | #8 | #9 | #10 | |||
| Moisture | % | 4.6 | 2.1 | 5.7 | 3.7 | 4.4 | Gravimetry; Regulation (EC) No 152/2009 3 , Annex III, Method A |
| Protein (N × 6.25) | % | 62.8 | 63.0 | 62.9 | 67.8 | 62.5 | Titrimetry; (Kjeldahl) ISO 8968‐1 |
| Fat | % | 2.8 | 6.0 | 5.7 | 7.3 | 5.3 | Gravimetry; Regulation (EC) No 152/2009 3 , Annex III, Method H |
| Ash | % | 9.7 | 9.9 | 5.2 | 4.1 | 5.7 | Gravimetry; Regulation (EC) No 152/2009 3 , Annex III, Method M |
| Insoluble fibre | % | 5.9 | 7.2 | 9.9 | 9.0 | 9.7 | Gravimetry; AOAC 991.43 |
| Soluble fibre | % | 2.5 | 2.6 | 1.3 | 1.5 | 1.3 | Gravimetry; AOAC 991.43 |
| Calcium | mg/kg | 4,800 | 4,900 | 5,700 | 2,300 | 2,300 | ICP‐OES; NEN‐EN 5510:2007 en |
| Iron | mg/kg | 350 | 350 | 420 | 360 | 350 | ICP‐OES; NEN‐EN 5510:2007 en |
| Potassium | mg/kg | 11,900 | 10,200 | 9,100 | 5,800 | 11,800 | ICP‐OES; NEN‐EN 5510:2007 en |
| Copper | mg/kg | 9.5 | 8.1 | < 3 | < 3 | < 3 | ICP‐OES; NEN‐EN 5510:2007 en |
| Magnesium | mg/kg | 1,060 | 1,090 | 1,020 | 740 | 1,120 | ICP‐OES; NEN‐EN 5510:2007 en |
| Manganese | mg/kg | 79 | 97 | 51 | 40 | 50 | ICP‐OES; NEN‐EN 5510:2007 en |
| Boron | mg/kg | 7.4 | 4.6 | 2.8 | 2.8 | 2.7 | ICP‐MS; prEN 15763: 2008 |
| Molybdenum | mg/kg | 36.0 | 39.0 | 16.1 | 16.0 | 15.7 | ICP‐MS; prEN 15763: 2008 |
| Zinc | mg/kg | 41 | 22 | 37 | 28 | 43 | ICP‐OES; NEN‐EN 5510:2007 en |
ΙCP‐OES: inductively coupled plasma optical emission spectroscopy; ΙCP‐MS: inductively coupled plasma mass spectrometry; NEN: Nederlandse Norm; EN: Europese Norm; ISO: International Organization for Standardization; AOAC: Association of Official Analytical Collaboration; EC: European Commission.