Twenty-four-hour duplicate diet study 1994; nitrate and nitrite: method development and intake per person per day.
In spring and autumn of 1994 duplicates of 24-h diets were collected from 123 consumers (respondents). One goal of this study is to determine the amount of nitrite and nitrate in the duplicates of 24-h diets in order to establish the oral daily intake of these analytes. For this purpose a HPIC/UV method for the determination of nitrate and nitrite in duplicate diets was developed and validated. The mean intake of nitrate is 80 mg NO3- ion/person per day and the median intake of nitrite is 0.1 mg NO2- ion/person per day. The daily intake for nitrate as well nitrite is higher than found in the duplicate diets collected in the 1984/1985 study.
van Vliet
J J
JJ
Laboratory for Residue Analysis (ARO), National Institute of Public Health and the Environment (RIVM), Bilthoven, The Netherlands.
Vaessen
H A
HA
van den Burg
G
G
Schothorst
R C
RC
D000293:Adolescent; D000328:Adult; D000368:Aged; D002852:Chromatography, Ion Exchange / Q000379:methods; D004032:Diet; D005504:Food Analysis; D006801:Humans; D008875:Middle Aged; D009426:Netherlands; D009566:Nitrates / Q000032:analysis*; D009573:Nitrites / Q000032:analysis*
D009566:Nitrates; D009573:Nitrites