Betekenis van:
trace element

trace element
Zelfstandig naamwoord
    • an element that occurs at very small quantities in the body but is nonetheless important for many biological processes

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    Voorbeeldzinnen

    1. Trace element (copper or zinc)
    2. The trace element concentrations selected must lie within the range of sensitivity of the spectrophotometer used.
    3. 5 % of the higher result for contents of the trace element concerned above 200 mg/kg.
    4. Using a calibration curve, calculate the trace element concentration in the solution to be analysed and express the result in milligrams of trace element per kilogram of sample (ppm).
    5. Norway may,with regard to coccidiostates and histomonostats and trace element copper as growth promoter, maintain its national legislation;
    6. 5 mg/kg, in absolute value, for contents of the trace element concerned up to 50 mg/kg,
    7. 10 % of the higher result for contents of the trace element concerned from 50 and up to 100 mg/kg,
    8. Adaptations a) and b) shall also apply to authorisations of coccidistates and histomonostats, trace element copper as growth promoter and antibiotics for use as additives in animals nutrition.’
    9. Glassware must be of resistant borosilicate type and it is recommended to use apparatus which is reserved exclusively for trace element determinations.
    10. The weight of sample to be ashed is calculated from the approximate trace element content of the feed in relation to the sensitivity of the spectrophotometer used.
    11. 10 mg/kg, in absolute value, for contents of the trace element concerned from 100 and up to 200 mg/kg,
    12. The weight of sample to be ashed is calculated from the approximate trace element content of the feed in relation to the sensitivity of the spectrophotometer used. For certain feed low in trace elements it may be necessary to start with a 10 to 20 g sample and make up the final solution to only 100 ml.