concentration unit gram per liter gram per liter g/L "A mass unit density which is equal to mass of an object in grams divided by the volume in liters." [UOC:GVG] g per L A mass unit density which is equal to mass of an object in grams divided by the volume in liters. g/L gram per litre gram per liter based unit gram per liter gram per liter g/L "A mass unit density which is equal to mass of an object in grams divided by the volume in liters." [UOC:GVG] g per L A mass unit density which is equal to mass of an object in grams divided by the volume in liters. g/L gram per litre