New PDF release: Advanced Propellant Chemistry

By Gould R.F. (ed.)

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Processing may further complicate the situation, by concentrating the contaminant in a particular fraction such as vegetable oil. It is therefore vital to identify all potential sources of contaminants in order to prevent contamination from occurring. 1 Primary food production In the field, soil can sometimes be a significant source of contamination. For example, in areas of mineralisation, heavy metals may occur naturally at elevated levels in soils. If there has been mining activity in the past this can exacerbate the problem by the spreading of mine spoil at the surface.

QRA modelling is still under development and is not widely used outside the USA. 4 Exposure analysis Having established some information about the relationship between dose and response it is necessary to determine the levels of actual doses to the human population. Two pieces of information are vital for this: • Occurrence data: the concentrations of the chemical in the foods of concern including, if relevant, the frequency of occurrence. • Food consumption data: the amounts of the affected foods eaten including, if necessary, consumption by sub-groups.

ISBN 0-412723107. DOUGLASS, J. S. and TENNANT, D. R. (1997). Estimations of dietary intake of food chemicals. pp. 195–215 in TENNANT, D. R. ) Food Chemical Risk Analysis. Blackie Academic and Professional, Chapman and Hall, London. ISBN 0-412-723107. MAFF UK Food Surveillance Information Sheets. Number 160, September 1998. Lead, cadmium copper and zinc in offals. FoodBalanceSheet&Domain=FoodBalanceSheet RUBERY, E. , BARLOW, S. M. 36 7. 8. 9. 10. 11. 12. Food chemical safety and WISEMAN, M. (1990).

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Advanced Propellant Chemistry by Gould R.F. (ed.)

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