ABSTRACT
The daily dietary calcium and magnesium intakes in Belgium were evaluated by sampling duplicate portions of food, destruction in a microwave oven and their calcium and magnesium contents determined by atomic absorption spectroscopy. The mean intake value for calcium (618 +/- 125 mg/day) was found to be less than those values measured in most other countries and was below the recommended daily allowance (RDA). The mean intake value for magnesium (271 +/- 44 mg/day) was similar to levels found in most other countries, but was below the RDA value for healthy adult men (350 mg/day) whilst being adequate for healthy women (280 mg/day).
Subject(s)
Calcium, Dietary/analysis , Diet , Magnesium/analysis , Trace Elements/analysis , Adult , Asia , Belgium , Europe , Female , Humans , Male , Nutritional Requirements , Spectrophotometry, Atomic , United StatesABSTRACT
Daily dietary manganese intake in Belgium was evaluated by duplicate portion sampling, destruction by cooking in a microwave oven and subsequent analysis for this element by atomic absorption spectrometry. The mean intake value (3.1 +/- 1.1 mg/day) is similar to levels found for most other countries and is within WHO/RDA and National Research Council, USA recommended intake ranges.
Subject(s)
Diet Surveys , Diet , Manganese/administration & dosage , Adult , Belgium , Female , Food Analysis/methods , Freeze Drying , Humans , Male , Microwaves , Middle Aged , Spectrophotometry, AtomicABSTRACT
The dietary selenium (Se) intake in Belgium has been re-evaluated. Duplicate meal collection, wet acid destruction and flow injection hydride generation atomic absorption spectrometry were used as techniques. The daily intake ranged from 28.4 micrograms (Liège, Walloon part of the country) to 61.1 micrograms (Vilvoorde, central part of the country). Compared with intakes recently published for other countries, the actual Belgian value corresponds to intermediate ranges of Se intake.
Subject(s)
Diet , Selenium/administration & dosage , Belgium , Hospitals, Military , Hospitals, University , Humans , Spectrophotometry, AtomicABSTRACT
An estimation of the dietary selenium intake in different population groups in Belgium has been carried out. 24 h duplicate meals and food consumption statistics combined with concentration levels in different foods, as determined by hydride generation atomic absorption spectrometry, are used. Dietary intake of selenium is low to very low, especially for vegetarians (12.7 +/- 9.1 micrograms) and patients on long-term total parenteral nutrition (1.2 +/- 0.8 microgram). The different intakes are discussed and compared with intakes published for other countries, while the importance of bioavailability of the selenium in food in the risk of deficiency is stressed.
Subject(s)
Diet , Selenium/administration & dosage , Adult , Age Factors , Aged , Belgium , Diet, Vegetarian , Female , Food Analysis , Humans , Infant , Male , Parenteral Nutrition, Total , Risk , Selenium/deficiencyABSTRACT
Chromium and selenium contents of thirty-five commercially available enteral feed were determined by atomic-absorption spectrometry after previous wet ashing. Daily chromium intake, based on a 2,000 kcal (8,368 kJ) diet, was below the proposed safe and adequate intake for 78% of the feedings. Hypocaloric diets especially provided extremely low doses of this element. For selenium nearly 80% of the diets provided intakes below the recommended 50 micrograms/day. Selenium concentration was positively correlated with the protein content (p = 0.007), whilst fat content and selenium concentrations showed a significant negative correlation (p = 0.002). No definite correlation could be found between the selenium and chromium content of the food (p greater than 0.1).
Subject(s)
Chromium/analysis , Enteral Nutrition , Food, Formulated/analysis , Selenium/analysis , Energy Intake , Enteral Nutrition/standards , Humans , Nutritional RequirementsABSTRACT
Procedures for determination of selenium in urine samples are reviewed. Basic problems encountered in sampling and sample-treatment are discussed. Concentration levels and spedation of the element are summarized.
ABSTRACT
The estimation of the dietary selenium intake in Belgium has been carried out. Average concentration levels in different food classes, as determined by hydride generation atomic absorption spectrometry are used combined with dietary consumption records or production, importation and exportation statistics. Analysis of duplicate meals has been used as an alternative evaluation method. Dietary intake of selenium in Belgium is discussed and compared with intakes published for other different countries.
Subject(s)
Diet , Food Analysis , Selenium , Belgium , Feeding Behavior , HumansABSTRACT
Selenium concentration values for human urine samples are presented, and the literature on the chemical species of the element in urine is critically reviewed. Daily excretion levels in healthy persons and in pathological or experimental conditions are compiled. Medical implications and the significance of urinary selenium determination in assessing the selenium status in man are discussed.
Subject(s)
Selenium/urine , Global Health , Humans , Kinetics , Occupational Diseases/chemically induced , Occupational Diseases/urine , Reference Values , Selenium/metabolism , Selenium/toxicityABSTRACT
Two common procedures for wet destruction of biological materials for subsequent determination of selenium have been investigated. Rat organs and biological fluids were endogenously labelled with (75)Se to monitor losses during the procedures. Addition of nitric and perchloric acids with gradual heating up to 210 degrees seemed to be the best method: at this temperature the labelled selenium was still recovered quantitatively, and the destruction was fast and efficient.
