Intake of nickel and vanadium by humans. A survey of selected diets

Abstract

The nickel and vanadium contents of nine institutional diets were determined by atomic absorption spectrometry with background correction. The following values were obtained for nickel: mean concentration, 0.27 +/- 0.02 microgram/g (dry weight); range, 0.19 and 0.41 microgram/g; mean intake, 165 +/- 11 microgram/day or 75 +/- 10 microgram/1000 cal. The respective values for vanadium were: 0.032 +/- 0.004 microgram/g (dry weight); 0.019 to 0.050 microgram/g; 20.4 +/- 2.3 microgram/day or 8.9 +/- 1.0 microgram/1000 cal. Thus, vanadium is present at approximately one order of magnitude less than nickel.

Trace metal contents in chewing gums and candies marketed in Turkey

“…Nickel contents in the literature have been reported in the range of 0.1-3.8 ppm in selected sweets of different shops of Karachi city (Naqvi et al 2004), and in the range of 0.041-8.23 μg/g in the different types of chocolates (Dahiya et al 2005). The dietary contribution of nickel has been reported to range from 200 to 900 μg/day (Schroeder 1965;Myron et al 1978;Clemente et al 1980;Smart and Sherlock 1987;Nielson and Larsen et al 2002). The reported nickel content in Indian foods is much higher (240-3,900 μg/day) (Krishnamurti and Pushpa 1991).…”

Nickel Absorption and Kinetics in Human Volunteers

“…Based upon analyses on nickel in foods and meas-urements of nickel concentrations in prepared diets (20)(21)(22), the breakfast that was consumed by the volunteers in Experiment 2 contained <60 pg of nickel, equivalent to <-1 pg of nickel/kg body wt. Since the administered doses of NiS04 ranged from 12 to 50 pg of nickel/kg, the background nickel content of the consumed breakfast probably had little effect on the gastrointestinal absorption rates of the added nickel.…”

Lead, cadmium and nickel in chocolates and candies from suburban areas of Mumbai, India

“…Like lead, nickel levels in cocoa chocolates were higher than in the milk-based chocolates and sugar or fruit flavoured candies. The dietary contribution of nickel has been reported to range from 200 to 900 mg/day (Schroeder, 1965;Myron et al, 1978;Clemente et al, 1980;Smart and Sherlock, 1987;Nielson and Flyvholm, 1984;Larsen et al, 2002). In Indian foods the nickel content reported by Krishnamurti and Pushpa (1991) is much higher (240-3900 mg/day).…”