9The contamination of food with pesticide residues is of significant concern to consumers and 10 legislation has been implemented worldwide to ensure compliance with Maximum Residue 11 Levels of chemicals in food. The occurrence of the potato sprout inhibitor, isopropyl N-(3-12 chlorophenyl) carbamate (chlorpropham or CIPC) residues on cereals, such as wheat, is of 13 concern as this chemical is not authorised for use on cereals, and therefore the route of 14 unintentional contamination warrants further investigation. This study reports on the risk of 15 CIPC cross-contamination of grain that was stored in a commercial potato store and provides 16 a method for low level quantification of CIPC in cereals. A High Performance Liquid
The loss of the sprout suppressant, chlorpropham (CIPC), to the fabric of potato stores is currently of concern due to the risk of potential cross contamination of other crops subsequently housed in these stores. HPLC UV/VIS and GCMS methods were successfully employed to detect CIPC in the concrete flooring of research and commercial potato stores with histories of between 1 and 26 years of use. The concentrations in identical research stores, with different numbers of applications, were in the range 0.58-5.7 and 3.4-112 μg g −1, suggesting the magnitude of contamination was influenced by the number of applications. Commercial store A, with a history of 18 seasons of applications (estimate of total CIPC applied 2040 kg), had concentrations varying between 6 and 48 μg g −1 in the top three centimetres, with more than 92% within the top centimetre. In contrast, commercial store B, with a history of less than five seasons of applications (estimate of total CIPC applied 319 kg), had concentrations varying between 0.58 and 304 μg g −1 in the top four centimetres, with less than 47% within the top centimetre. The difference in depth distributions between A and B may be due to the structural integrity of the concrete, which was much poorer in B. CIPC was persistent in all stores irrespective of the total quantities of CIPC applied and date of the final application.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.