Tender For Supply Of Water Testing Chemicals, Buffer Capsules Ph 4.0 ± 0.05 Buffer Capsules Ph 7.0 ± 0.05 Buffer Capsules Ph 9.2 ± 0.05 Hydrazine Sulphate Hexamethylenetetramine Potassium Chloride Ammonia Buffer Solution Sodium Chloride Edta Eriochrome Black T Calcium Carbonate Potassium Chromate Silver Nitrate Ferrous Ammonium Sulphate Sulphuric Acid Potassium Permanganate Conc. Hydrochloric Acid Hydroxylamine Hydrochloride Ammonium Acetate Glacial Acetic Acid 1-10 Phenanthroline Monohydrate