tender for chemical consumables for cod test in bio-toilet effluent. (1) silversulphate - 25 grams, (2) mercuric chloride - 50 grms, (3) mercuric sulphate - 250 grms(4) potassium dichromate - 500 grms ferrous indicators - 1 no, (5) ferrous ammoniumsulphate - 250 grms (6) potassium hydrogen phthalate - 250 grms (7) sulphuric acid -250 ml. above are lab analytical grade chemicals (8) glass burette -25ml and 50ml(0.1ml graduation ) 5 nos each.
