The levels of fluoride airborne particulates emitted from welding processes were investigated. They were sampled with the patented IOM Sampler, developed by J. H. Vincent and D. Mark at the Institute of Occupational Medicine (IOM), personal inhalable sampler for simultaneous collection of the inhalable and respirable size fractions. Ion chromatography with conductometric detection was used for quantitative analysis. The efficiency of fluoride extraction from the cellulose filter of the IOM sampler was examined using the standard sample of urban air particle matter SRM-1648a. The best results for extraction were obtained when water and the anionic surfactant N-Cetyl-N–N–N-trimethylammonium bromide (CTAB) were used in an ultrasonic bath. The limits of detection and quantification for the whole procedure were 8 ?g/L and 24 ?g/L, respectively. The linear range of calibration was 0.01–10 mg/L, which corresponds to 0.0001–0.1 mg of fluorides per m3 in collection of a 20 L air sample. The concentration of fluorides in the respirable fraction of collected air samples was in the range of 0.20–1.82 mg/m3, while the inhalable fraction contained 0.23–1.96 mg/m3 of fluorides during an eight-hour working day in the welding room.
Total fluoride intake and implications for dietary fluoride supplementation
This paper reviews the history and validity of recommended "optimal" levels of systemic fluoride intake and the available information on levels of fluoride intake in young children from foods and beverages (including water), dentifrices, dietary fluoride supplements, mouthrinses, and gels. Most of the studies emphasize the substantial variation in ingestion among individuals. Often, a substantial
Fluoride Fact Sheet for Health Professionals
This is a fact sheet intended for health professionals. For a reader-friendly overview of Fluoride, see our consumer fact sheet on Fluoride. Introduction Fluoride, a mineral, is naturally present in many foods and available as a dietary supplement. Fluoride is the ionic form of the element fluorine, and it inhibits or reverses
Fluoride levels in UK infant milks.
AIM: To provide a comprehensive report of fluoride concentration in UK infant milks and estimate their contribution to daily fluoride intake. METHODS: A total of 60 formula milk products available commercially or within a hospital environment were analysed, along with eight pasteurised cow's milk samples. Formula milk products requiring preparation were reconstituted with
Fluoride content of foods made with mechanically separated chicken.
The goal of the present study was to determine the extent to which foods made with mechanically separated chicken can contribute to total fluoride intake. Fluoride content of each blended sample was determined with a fluoride combination electrode following perchloric-acid-facilitated diffusion of hydrogen fluoride. Infant foods had the highest fluoride content followed by chicken sticks, luncheon meats, and canned
Clinical trial of the effect of prenatal fluoride supplements in preventing dental caries.
In 1966 the US Food and Drug Administration forbad advertisements claiming efficacy of prenatal fluoride supplements, due to lack of clinical data supporting such a claim. In the early 1980s, the NIDR funded a randomized clinical trial to address this issue. 1,400 women in the first trimester of pregnancy were
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