Overview
Kiczorowski and coauthors compared raw and fermented vegetables for nutrients, minerals, vitamins, phenols, lead, and cadmium. The paper is directly useful for processing-effect evidence because the same vegetable types were compared before and after fermentation. It does not support the mineral-water row named in the fetched filename.
Key numbers
Table 6 reports Pb and Cd in fresh matter (Table 5 is macroelements Na, K, Ca, Mg, P; Table 6 is microelements and heavy metals). Raw vegetables contained Pb from 4.28 ug/g fresh matter in pepper to 8.28 ug/g fresh matter in carrot, and Cd from 0.031 ug/g fresh matter in red beet to 0.057 ug/g fresh matter in cucumber. The authors report that fermentation reduced Pb most strongly in carrot, cucumber, and red beet, with an average 18.5% lower Pb content than raw material in those vegetables. Cd reductions were smaller; carrot, pepper, and red beet showed the highest Cd decline, averaging 12% lower than raw vegetables.
Extracted Table 6 examples:
| Matrix | Pb | Cd |
|---|---|---|
| Broccoli, raw | 4.39 +/- 0.71 ug/g fresh matter | 0.041 +/- 0.37 ug/g fresh matter |
| Broccoli, fermented | 3.78 +/- 0.23 ug/g fresh matter | 0.039 +/- 0.64 ug/g fresh matter |
| Carrot, raw | 8.28 +/- 0.51 ug/g fresh matter | 0.043 +/- 0.26 ug/g fresh matter |
| Carrot, fermented | 6.73 +/- 0.34 ug/g fresh matter | 0.038 +/- 0.44 ug/g fresh matter |
| Cucumber, raw | 5.30 +/- 0.45 ug/g fresh matter | 0.057 +/- 0.53 ug/g fresh matter |
| Cucumber, fermented | 4.32 +/- 0.18 ug/g fresh matter | 0.054 +/- 0.24 ug/g fresh matter |
Methods (brief)
The experiment used five vegetables from a Polish vegetable farm in southeast Poland (Lublin area, 2019): broccoli (Brassica oleracea var. italica), carrot (Daucus carota), cucumber (Cucumis), pepper (Capsicum annuum, color not specified), and red beet (Beta vulgaris subsp. vulgaris). Fermentation used 1-L glass jars with approx. 600 g of shredded raw vegetable, a spice mix (horseradish, garlic, pepper [Piper nigrum], white mustard, dill), and 2.5% NaCl brine at 24 deg C for 3 weeks followed by refrigeration at 6 deg C. Four fermentation repetitions were carried out per vegetable, with each chemical analysis performed in three replications (n=4 for the means and SDs in Tables 5-7; n=3 for the internal chemistry replication).
For Pb and Cd, 3 g of sample was incinerated at 480 deg C in a muffle furnace, solubilized with 6 mol/L hydrochloric acid, and quantified by ICP mass spectrometry on a Varian 820 MS spectrometer (Varian, Melbourne, Australia). The certified reference material was INCT-TL-1 Tea Leaves (containing 0.030 mg Cd and 1.78 mg Pb per kg). Pb and Cd are reported as total metal in ug/g fresh matter; the paper does not address speciation, which is consistent with HMI’s vocabulary treating Pb and Cd as unspeciated.
Implications
Certification: Useful as processing evidence for vegetable fermentation effects on Pb and Cd, but not as a pooled benchmark for a single product row without separating vegetable type and basis.
Courses: Demonstrates that fermentation can change measured heavy-metal content along with nutrient composition.
App: Supports a processing qualifier for fermented vegetables after synthesis.
Related evidence
Update history
No substantive edit history is available in this build. The full commit record is available in git.