supply of lab materials-1 trubidity standard 400ntu 2 conductivity standard 1000umho 1416umho refrence standard 3 calcium std. reference std. 4 mixed indicator for alikalinity std. make or lab prepared 5 alkalinity std. reference standard 6 phenophathalein indicater ph 8.2 – 10 7 methyl orange indicater ph 2.9 – 4.6 8 potessium chromate indicator 9 chloride standard 500mg reference standard merck 10 conditionar reagent for sulphate std. merck 11 fluoride electrode feeling solution for orion 12 iron free distilled water ( reagent grade 1 water ) 13 iron standard 100mg reference standard 14 iron free distilled water ( reagent grade 1 water ) 15 iron standard 100mg reference standard 16 special reagent for manganese std make approx for 600 sample 17 ammonium per sulphate gr ( approx for 600 sample ) 18 mangnese standard solution 100mg reference std. 19 m7hr fc agar.std.make ( expire 2 year ) 20 membrane 47 mm dia 0.45 micron grided individually strelizde std. make certified 21 isa 475ml for orion 22 nitrate std. 100ppm for orion 23 nitrate electrode feeling solution fororion