bids are invited for purchase of chemicals for soil analysis percentage weight by weight 36 n , conc. hydrochloric acid 12 n , dtpa ar grade , edta- di sodium salt ar grade , ferroin indicator ar grade , gum acacia , acetic acid glacial , l ascorbic acid ar grade , magnesium oxide ar grade , methyl red ar grade , methylene blue ar grade , nitric acid ar grade , paraffin wax , ph 4 buffer solution , ph 7 buffer solution , ph 9.2 buffer solution , phenolphthalein indicator ar grade , potassium fluoride ar grade , potassium chloride ar grade , potassium dichromatear grade , pottasium permanganate ar grade , potassium dihydrogen orthophosphate ar grade , pottasium antimony tartarate ar grade , silver nitrate ar grade , sodium acetate dihydrate ar grade , sodium hydroxide ar grade , sodium hexa meta phosphate ar grade , triethanol amine ar grade , hydrochloric acid 0.1m , blotting paper , buffer capsule ph4 , buffer capsule ph7 , buffer capsule ph9.2 , calcium chloride dehydrate ar grade , hydrogen peroxide ar grade total quantity : 1642