FerroVer Iron Reagent 10mL is a powder pillow reagent used for determining total iron in water samples, particularly in wastewater and municipal water. It utilizes the 1,10-phenanthroline method, where the reagent converts all soluble iron and most insoluble iron forms to ferrous iron, which then reacts with 1,10-phenanthroline to produce an orange color proportional to the iron concentration.