Perspective Chapter: Sample Preparation Techniques for Electrochemical Analysis of Pesticides and Heavy Metals in Environmental and Food Samples

*Ranil Clément Tonleu Temgoua, Sherman Lesly Zambou Jiokeng, Kevin Yemele Tajeu, Gullit Deffo, Lionnel Averie Vomo, Fabiola Tonleu Dontsi, Evangeline Njanja and Ignas Kenfack Tonlé*
