supply of filter papers, crm at dadar sewage laboratory supply of filter papers, crm standards and chemicals for dadar sewage laboratory situated at dadar pumping station , supply of filter papers, crm standards and chemicals for dadar sewage laboratory situated at dadar pumping station , filter papers- glass microfibre (material code - 1010100700563) , potassium hydrogen phthalate (material code -1310500800839) , potassium dichromate(material code -1310500800310 , buffer solution of ph 9.18 (material code - 1310500800832) , bod std. solution 210 ± 20 mg/l(material code - 1310500800840) , potassium chloride solution - conductivity std 1.41 ms/cm (material code -1310500800916) , conc. h2so4(material code -1310500100009) , sodium hydroxide pallets (material code - 1310500800477 ) , mangnous sulphate monohydtrate, (material code -1310500800633) , potassium iodide for analysis(material code -1310500800469 ) , universal reagent n-hexane(material code -1310500800636 ) , 2- propanol for analysis(material code -1310500800952 ) , ammonium ferrous sulphate(material code -1310500800157) , silver sulfate for analysis(material code -1310501100045 ) , silica gel self-indicating coarse(material code -1310500300383 ) , starch soluble(material code -1310500800615) , boric acid (material code -1310501100003) , nitric acid about 69% for analysis emparta® acs(material code -1310500800482 ) , cod cell test range 50–500 mg/l cod (material code -1310500800957) , cod cell test range 5.0–80.0 mg/l cod (material code -1310500800958) , sodium azide (material code -1310500800313 ) , sodium thio sulphate pentahydrate (material code -1310500800835) , cr standard (1000 mg/l)(material code -1310500800908 ) , cu standard (1000 mg/l)(material code -1310500800909 ) , pb standard (1000 mg/l) (material code -1310500800910 ) , hg standard (1000 mg/l)(material code -1310500800911) , ni standard (1000 mg/l)(material code -1310500800912) , na standard (1000 mg/l)(material code -1310500800913 ) , zn standard (1000 mg/l) (material code -1310500800914) , buffer solution of ph 6.86(material code -1310500800833 ) , silver nitrate soln 0.02 mol(material code -1310500800634 , n/50 sulfuric acid (material code -1310500800635) , ferroin indicator solution(material code -1310500800630) , buffer solution of ph 4.01 buffer(25 0 c)(material code -1310500800834) , buffer solution of ph 7.00 buffer(25 0 c) (material code -1310500800960 ) , phosphate buffer solution,?h = 7.00(material code -1310500300452)