Automated determination of serum iron.
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Autoanalysis↗
Biomedical subjects
C G Gref
Publications and source records attributed to C G Gref.
Dietary vitamin c supplementation and common laboratory values in the elderly.
The effects of dietary supplementation with vitamin C on several common laboratory values were assessed in 27 elderly patients in long-stay wards. The patients had shown low plasma ascorbic acid concentrations before the study. During three consecutive periods of six weeks the patients received either placebo or moderate (200 mg/day) or high (2000 mg/day) doses of vitamin C. There was a significant rise of serum folate concentration after both doses of vitamin C. A decrease of serum uric acid concentration after high doses of vitamin C was found. Supplementation with vitamin C did not affect other values of laboratory examinations determined. The results suggest that dietary supplementation with either moderate or high doses of vitamin C has only very few and small influences on common laboratory values in elderly patients.
Journal Article↗
Gravimetric determination of ash in foods: NMKL collaborative study.
A gravimetric method for the determination of ash was collaboratively studied in 14 laboratories. The food is ashed at 550 degrees C to constant weight and the ash is determined by weighing. Seven samples of various food commodities with estimated ash contents varying between low and high (0.07-8.0 g/100 g) were included in the study. The relative standard deviations for reproducibility varied, ranging from 1.0 and 1.3 for ash contents of 7.2 and 8.0 g/100 g, to 11 +/- 1% for low ash contents of 0.07 and 0.27 g/100 g.
Food Analysis↗