Twenty-four-hour duplicate diet study 1994; nitrate and nitrite: method development and intake per person per day

• Published in: Cancer letters Vol. 114; no. 1; pp. 305 - 307
• Main Authors: van Vliet, J.J.H., Vaessen, H.A.M.G., van den Burg, G., Schothorst, R.C.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Shannon Elsevier Ireland Ltd 19.03.1997; Elsevier
• Subjects: Adolescent; Adult; Aged; Biological and medical sciences; Carcinogenesis, carcinogens and anticarcinogens; Chemical agents; Chromatography, Ion Exchange - methods; Consumer; Daily intake; Diet; Drinks; Duplicate diet; Food; Food Analysis; Humans; Medical sciences; Middle Aged; Netherlands; Nitrate; Nitrates - analysis; Nitrite; Nitrites - analysis; Tumors; Netherlands; Nitrate; Consumer; Drinks; Nitrite; Duplicate diet; Daily intake; Food; Consumption; Validation; Nitrites; Nitrates; Carcinogen; Absorption; Diet; Risk factor; Beverage; Daily dose; Dutch; Quantitative analysis
• ISSN: 0304-3835; 1872-7980
• DOI: 10.1016/S0304-3835(97)04688-0

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 NO 3 − ion/person per day and the median intake of nitrite is 0.1 mg NO 2 − 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.