Chemical digestion of samples is required for the photometric determination of COD, TOC, total phosphate and total nitrogen · Selectable temperatures (100 / 120 / 150 °C) and reaction time (30 / 60 / 120 minutes) · COD (150°C) · Total Chromium (100°C) · Total Phosphate (100°C) · Total Nitrogen (100°C) · TOC (120°C)