{"status":"OK","msg":"Details loaded!","presentation":{"id":31,"title":"ANALYTICAL NUCLEAR TECHNIQUE: TXRF IN THE ANALYSIS OF TRACE ELEMENTS IN FOOD","abstract":"This work provides some applications of Total Reflection X-ray Fluorescence (TXRF) in the field of food analysis. \r\nThe main reason for food analysis is because it is becoming more demanding safety and quality in this field by the regulatory agencies to ensure compliance with current standards.\r\nThe concentrations of major, minor and traces elements were investigate by TXRF. A fast analysis allows an early detection before food could reach consumers. \r\nThe following food samples were considered: wine, milk and cheese\r\nThe samples may be separated in two different groups. The first two may be directly analyzed by TXRF, since they are liquid and can be diluted in water. The last must be digested to be analyzed in a microwave digester using nitric acid and oxygen peroxide. \r\nIn the case of wines an important application is the classification of them through the elemental analysis as a fingerprint the possible vineyard. \r\nFor milk, analysis of the elements it has an important role because it is one of the main nutrients for children.\r\nFurthermore dairy farms located in arsenicism areas were checked the presence of As in both milk and cheese samples.\r\nMilk and wine analysis was done directly over a dilution (1:5) of the samples. Cheese analysis needed a previous mineralization. In all case Ga (1mg\/L) was used as internal standard.\r\nTotal reflection X-Ray Analysis was perfomed in a S2 Picofox Bruker, X-rays from Mo tube at 50KV 0.6mA. . The accuracy of the measurements was calculated by determining the concentration of the elements in a standard solution (ICP-multielement standard solution). For milk samples the equipment was calibrate by adding elements that no are included in the sample in order to perform de sensitivity curves for K and L X- rays lines. In the case of wines calibration was performed using standard solution 20 % in ethanol.\r\nThe results were satisfactory and allow propose the use of TXRF as a promising technique in the field of food analysis, in a wide scope, that is both environmental or quality control, or any other issues.\r\n","keywords":"X-Ray; Fluorescence; food analysis, Total reflection","status":"active","sarx_st":"accepted","user_id":41,"created_at":"2016-04-27 13:08:06","updated_at":"2016-08-20 12:21:28","filename":"Abstract (SARX2016)Custo_food.doc","mode":"oral","sarx_code":"12_O-XRF","poster_group":null,"file":"2a2b18cd373ffd0a5055e58496aa2af6.doc","author":"Graciela Custo","affiliation":"Lic Qu\u00edmica \/<\/b> Comisi\u00f3n Nacional de Energ\u00eda At\u00f3mica \/<\/b> Argentina","user":{"id":41,"name":"Graciela Custo","degree":"Lic Qu\u00edmica","email":"custo@cnea.gov.ar","username":"custo@cnea.gov.ar","confirmed":0,"confirmation_code":"KRInvuwngpVPoCEwnpR5DbElKWMSbf","created_at":"2016-04-04 12:57:32","updated_at":"2016-08-03 14:38:26","sarx":1,"affiliation":"Comisi\u00f3n Nacional de Energ\u00eda At\u00f3mica","address":"Avenida Gral. paz 1499 San Mart\u00edn","zipcode":"1652","state":"Buenos Aires","phone":"54 11 67727893","fax":null,"city":"San Mart\u00edn","country":"Argentina","status":"active","is_admin":0,"category":"professor","school":0,"icdd":0}}}