laboratory chemicals laboratory chemicals ( make merck ) as per technical specification at annexure e , laboratory chemicals ( make: merck ) ( as per technical specification at annexure e ) , 1, 10-phenanthroline monohydrate emparta, acs, merck, 25g ( product code:1.94940.0026 ) , ammonia solution 28-30%, merck, 500ml ( product code:1.93101.0521 ) , buffer solution ph 10.00, merck, 500ml ( product code: 61914205001730 ) , cyclohexane for chromatography, merck ( product code: 60282710001730 ) , hydrochloric acid about 37% ( emparta, acs ) , merck, 500ml ( product code:1.93001.0521 ) , methanol ( emparta, acs ) , merck, 500ml ( product code:1.07018.0521 ) , methanol specially dried, merck, 500ml ( product code:1.94800.0521 ) , molecular sieve 3å x 1.5mm, merck, 250g ( product code: 61779902501730 ) , ortho-phosphoric acid 88% ( emparta, acs ) , merck, 500ml ( product code:1.93003.0521 ) , potassium hydrogen phthalate purified, merck, 500g ( product code: 61760305001730 ) , phenolphthalein indicator 1% solution, merck, 125ml ( product code: 61841701251730 ) , potassium iodide ( emparta ) , merck, 100g ( product code:1.93201.0121 ) , pyridine ( emparta, acs ) , merck, 500ml ( product code:1.94601.0521 ) , silver nitrate ( emparta acs ) , merck, 100g ( product code:1.93200.0121 ) , titriplex iii pure, merck, 100g ( product code: 61780001001730 ) , toluene ( emparta, acs ) , merck, 500ml ( product code:1.07019.0521 ) , toluene ( emparta, acs ) , merck, 2.5lit ( product code:1.07019.2521 ) , xylenol orange indicator, merck, 5g ( product code: 61858100051730 ) , zinc sulfate heptahydrate gr, merck, 500g ( product code: 61794505001730 ) , sodium chloride ( emparta, acs ) , merck, 500g ( product code:1.93206.0521 ) , 2-propanol for hplc, merck, 1lit ( product code: 60104010001730 ) , iodine monochloride for analysis, emparta, acs, merck, 100g ( product code:1.94908.0251 ) , potassium bromide, emparta, merck, 500g ( product code: 61870405001730 )