From this book you will learn: How to develop an HPLC method for quantitative analysis of 3-methyl-4-nitrophenol How to validate an HPLC method How to collect urine samples How to extract 3-methyl-4-nitrophenol for HPLC analysis How to quantify 3-methyl-4-nitrophenol using the developed HPLC method In addition the book include a very brief introduction about Fenitrothion and its metabolism summaries on the physico-chemical properties and toxicology of 3-methyl-4-nitrophenol and analysis of metabolite in drinks.