Photometric determination of chloride. • Photometric determination with mercury(II) thiocyanate and iron(III) nitrate. • Chloride ions react with mercury(II) thiocyanate to form undissociated mercury(II) chloride. The liberated thiocyanate forms with iron(III) ions a blood-red colouration. • Reaction basis analog to DIN EN ISO 15682-D31 • Type: standard test 1-20 Range: 10 mm cuvette: 1 - 125 mg/l Cl- 50 mm cuvette: 0.2 - 20.0 mg/l Cl- • Sufficient for 220 determinations • Sea water suitability no