NaFeEDTA fortified soy sauce showed higher iron absorption rate in Chinese females.

Objective: NaFeEDTA was considered as a promising iron fortificant for controlling iron deficiency anemia. Soy sauce is a suitable food carrier for iron fortification and is a popular condiment in China. Iron absorption rates of NaFeEDTA and FeSO4 were observed and compared in adult female subjects.

[2000 Chinese total diet study--the dietary lead and cadmium intakes].

Objective: In order to assess the safety of dietary lead (P) and cadmium (Cd) intakes in different areas in China, we carried out Chinese total diet study (TDS) in 2000 and obtained total lead and cadmium contents and intakes data and assessed the safety of lead and cadmium in Chinese dietary.

Methods: Using the Chinese total dietary study method, the analytical samples were obtained in different areas by food consumption survey, food aggregation, food sampling and preparation. The levels of dietary lead and cadmium were determined by the graphite furnace atomic absorption spectrometry.

[Study on the baseline contents and reference maximum limit standard of heavy metals and harmful element of 23 Chinese herbs in Northern China].

Objective: This study was carried out to obtain the baseline contents and establish the reference maximum limits of heavy metals and harmful element in China.

Methods: According as Chinese standard methods of heavy metals and harmful element, 254 Chinese herbs were determined.

Results: The contents of lead, cadmium, mercury and arsenic in different Chinese herbs were (1.

[Comparison of the methods on the study of dietary intakes].

Study of dietary intakes is an approach that estimates the potential influence that toxic and nutritional chemicals land in human health. It is also an important measure to ensure that diet is safe and nutritional. In this review, the different methods in dietary intakes' estimation are introduced and the methods are compared.

[Chinese total diet study in 2000--the dietary mercuric intakes].

Objective: To assess the safety of dietary mercuric intakes in different areas in China.

Methods: Using the Chinese total dietary study method, the analytical samples were obtained in different areas by food consumption survey, food aggregation, food sampling and preparation. The levels of dietary total mercury were determined by cold vapor atomic absorption spectrometry.

[Determination of selenium in selenium-enriched foods by hydride generation atomic absorption spectrometry].

Objective: To determine selenium (Se) in selenium-enriched foods by hydride generation atomic absorption spectrometry.

Methods: The samples were digested by HNO3-HCLO4 and reduced by NaHB4, and then was determined in 6 mol/L HCL.

Results: The results showed that the detectable range, detection limit, recovery rate, and the relative standard deviation(RSD) of the method were 0 - 80.

[2000 Chinese total dietary study--the dietary arsenic intakes].

Objective: To assess the safety of dietary arsenic intakes in different areas in China.

Methods: Using the total dietary study method, the analytical samples were obtained in different areas by food consumption survey, food aggregation, food sampling and preparation. The levels of dietary total and inorganic arsenic were determined by the hydride generation atomic absorption spectrometry and atomic fluorospectrophotometry.

[Antagonistic action of selenium against the toxicity of lead].

Selenium can antagonize lead toxicity by preventing damage from oxygen free radicals or by forming lead-selenium complex. In this review, three parts are summarized to discuss the relationship between selenium and lead toxicity: (1) The possible mechanisms of selenium protect against the toxicity of lead. (2) The antagonistic action of selenium on lead toxicity.

[Study on of dietary pesticide residues in Chinese residents].

Objectives: To investigate the change of pesticide residues in Chinese dietary through analysis on results of the pesticide residues in the Chinese total diet study carried out the first in 1990.

Methods: Organochlorine, such as HCH and DDT of 9 groups and 15 organophosphorus pesticide residues of 3 groups in four regions of China were determined by gas chromatography-electron capture detector (GC-ECD) and gas chromatography-flame photometric detector (GC-FPD) respectively. According to the amount of pesticide residues in various foods and the amount of food consumption in different areas, we calculated the amount of dietary intake of pesticide residues, then compared with the acceptable daily intake (ADI) or provisional tolerable daily intake (PTDI).