3 research outputs found
Multi residual analysis of 45 pesticides from beehive products: application of a simple extraction method
Get PDFEn este trabajo se presenta la aplicaci贸n de una metodolog铆a de extracci贸n sencilla y r谩pida llamada QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) que ha sido utilizada fundamentalmente para el an谩lisis de trazas de pesticidas en frutas y hortalizas, que con peque帽as modificaciones es adaptable tanto para el an谩lisis de cera como miel. El solvente de extracci贸n es acetonitrilo y la misma se realiza a temperatura ambiente agregando agua para miel y a 80掳C en ba帽o de agua para cera, luego se realiza una purificaci贸n que consiste en colocar el extracto en freezer a -20 掳C durante 15 hs y filtrar. Una purificaci贸n m谩s exhaustiva se logra agregando luego PSA (Primary and Secondary Amine). El m茅todo present贸 recuperaciones entre 70 y 120 % con DSR menores a 20 % para m谩s del 90 % de los pesticidas evaluados en ambas matrices analizados por LC-MS/MS.The application of a quick and simple methodology named QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) is presented. It has been mainly applied for the analysis of pesticide residues in fruits and vegetables, but with small modifications is suitable for the analysis of beeswax and honey. The extraction is made with acetonitrile at room temperature adding water for honey and at 80 掳C in water bath for beeswax, it is then followed by freeze-out clean-up (-20 掳C in freezer for 15 hs). Further clean-up of the extract is achieved adding PSA (Primary and Secondary Amine) afterwards. The method presented recoveries in both matrices between 70 and 120 % with RSD below 20 % for more than 90 % of the evaluated pesticides analyzed by LC-MS/MS.Asociaci贸n de Universidades Grupo Montevide
Multi residual analysis of 45 pesticides from beehive products: application of a simple extraction method
Get PDFEn este trabajo se presenta la aplicaci贸n de una metodolog铆a de extracci贸n sencilla y r谩pida llamada QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) que ha sido utilizada fundamentalmente para el an谩lisis de trazas de pesticidas en frutas y hortalizas, que con peque帽as modificaciones es adaptable tanto para el an谩lisis de cera como miel. El solvente de extracci贸n es acetonitrilo y la misma se realiza a temperatura ambiente agregando agua para miel y a 80掳C en ba帽o de agua para cera, luego se realiza una purificaci贸n que consiste en colocar el extracto en freezer a -20 掳C durante 15 hs y filtrar. Una purificaci贸n m谩s exhaustiva se logra agregando luego PSA (Primary and Secondary Amine). El m茅todo present贸 recuperaciones entre 70 y 120 % con DSR menores a 20 % para m谩s del 90 % de los pesticidas evaluados en ambas matrices analizados por LC-MS/MS.The application of a quick and simple methodology named QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) is presented. It has been mainly applied for the analysis of pesticide residues in fruits and vegetables, but with small modifications is suitable for the analysis of beeswax and honey. The extraction is made with acetonitrile at room temperature adding water for honey and at 80 掳C in water bath for beeswax, it is then followed by freeze-out clean-up (-20 掳C in freezer for 15 hs). Further clean-up of the extract is achieved adding PSA (Primary and Secondary Amine) afterwards. The method presented recoveries in both matrices between 70 and 120 % with RSD below 20 % for more than 90 % of the evaluated pesticides analyzed by LC-MS/MS.Asociaci贸n de Universidades Grupo Montevide
Multi residual analysis of 45 pesticides from beehive products: application of a simple extraction method
Get PDFEn este trabajo se presenta la aplicaci贸n de una metodolog铆a de extracci贸n sencilla y r谩pida llamada QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) que ha sido utilizada fundamentalmente para el an谩lisis de trazas de pesticidas en frutas y hortalizas, que con peque帽as modificaciones es adaptable tanto para el an谩lisis de cera como miel. El solvente de extracci贸n es acetonitrilo y la misma se realiza a temperatura ambiente agregando agua para miel y a 80掳C en ba帽o de agua para cera, luego se realiza una purificaci贸n que consiste en colocar el extracto en freezer a -20 掳C durante 15 hs y filtrar. Una purificaci贸n m谩s exhaustiva se logra agregando luego PSA (Primary and Secondary Amine). El m茅todo present贸 recuperaciones entre 70 y 120 % con DSR menores a 20 % para m谩s del 90 % de los pesticidas evaluados en ambas matrices analizados por LC-MS/MS.The application of a quick and simple methodology named QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) is presented. It has been mainly applied for the analysis of pesticide residues in fruits and vegetables, but with small modifications is suitable for the analysis of beeswax and honey. The extraction is made with acetonitrile at room temperature adding water for honey and at 80 掳C in water bath for beeswax, it is then followed by freeze-out clean-up (-20 掳C in freezer for 15 hs). Further clean-up of the extract is achieved adding PSA (Primary and Secondary Amine) afterwards. The method presented recoveries in both matrices between 70 and 120 % with RSD below 20 % for more than 90 % of the evaluated pesticides analyzed by LC-MS/MS.Asociaci贸n de Universidades Grupo Montevide
