Analyst c4an00686k PAPER Please check this proof carefully. O Our staff will not read it in detail after you have returned it. Translation errors between word-processor files and typesetting systems can occur so the whole proof needs to be read. Please pay particular attention to: tabulated material; equations; numerical data; figures and graphics; and references. If you have not already indicated the corresponding author(s) please mark their name(s) with an asterisk. Please e-mail a list of corrections or the PDF with electronic notes attached - do not change the text within the PDF file or send a revised manuscript. Corrections at this stage should be minor and not involve extensive changes. All corrections must be sent at the same time. Please bear in mind that minor layout improvements, e.g. in line breaking, table widths and graphic placement, are routinely applied to the final version. We will publish articles on the web as soon as possible after receiving your corrections; n no late corrections will be made. Please return your f final corrections, where possible within 4 48 hours of receipt by e-mail to: analyst@rsc.org 1 Food safety control of a-zearalanol through voltammetric immunosensing on Au–Pt bimetallic nanoparticle surfaces Mat ´ ıas Regiart, Sirley V. Pereira, Viviana G. Spotorno, Franco A. Bertolino * and Julio Raba * This study reports an accurate and sensitive strategy for a- zearalanol (ZER) determination in bovine urine samples 3 . ART  C4AN00686K_GRABS 1 5 10 15 20 25 30 35 40 45 50 1 5 10 15 20 25 30 35 40 45 50