Metrohm is pleased to present several titrimetric applications for the fast and straightforward of macronutrients such as sulfate, ammonium, potassium, and phosphate in NPK fertilizers. The reaction endpoint is determined using a thermometric sensor. Unlike competing methods such as gravimetric analysis or flame photometry, thermometric titration usually requires no sample preparation at all, and it is also faster, more robust, and easier to use.