procurement of some equipments & materials ( including all taxes ) forcentral water testing laboratory new town kolkata water treatment plant campus division-i, p.h.e. dte. ( 2nd call ) - 1 sterile membrane filter paper ( 0.45μ ) ( 100 nos ) ( highmedia ) 2 absorbant pads ( sterile ) ( 100 nos ) ( axiva ) 3 petri dish with triple vented radiation sterile ( 460062 ) 60x15mm pack of 250nos ( high media ) 4 ethanol alcohol 95% ( high media ) ( 500ml ) 5 sterile container for microbiology ( 100ml ) ( tarson ) 6 ph buffers - 25°c : ph:4.00 ±0.02@25°c, nist traceable ( inorganic venture ) 7 ph buffers - 25°c :, ph:7.00 ±0.01@25°c, nist traceable ( inorganic venture 8 ph buffers - 25°c, ph:10.00 ±0.01@25°c, nist traceable ( inorganic venture ) 9 sodium carbonate volumetric standard, secondary reference material for acidimetry, traceable to nist srm ( 80 gm ) ( merck ) 10 potassium dichromate volumetric standard, secondary reference material for redox titration, traceable to nist standard reference material ( 80 gm ) ( merck ) 11 1000 ntuturbidity standard nist traceable ( 100 ml ) 12 arsenic standard solution traceable to srm from nist 1000 mg / l as ( 500ml ) ( merck ) 13 iron standard solution traceable tonist srm 1000 mg / l fe, ( 500 ml ) ( merck ) 14 oem of turbidity meter ( wtw ) 15 filter paper no; 542 ( ge health lifescience ) 16 hydroxylamine hydrochloride, analytical grade, specification : assay-98%, ph value ( 5% water ) -2.5-3.5, acidity -0.25meg / g, ( 500 mg ) ( merck ) 17 ammonium acetate ( 500 g ) ( merck ) 18 1-10 phananthroline, monohydrate, ( 25 gm ) ( merck ) 19 total ionic strength buffer solution-iii ( tisab-iii ) ( 475 ml ) ( thermo scientific ) 20 silver nitrate, analytical grade, ( 25 gm ) ( merck ) 21 potassium chromate, analytical grade, assay-min 99.5%, ph of 5% soln-9.02-9.8 ( 500 gm ) ( merck ) 22 potassium iodide, analytical grade, assay- min 99.8%, ( 100 gm ) ( merck ) 23 iso-propyl alcohol, analytical grade, ( 500 ml ) ( hi media ) 24 silver diethyl dithio carbmate, for arsenic analysis acs, assay: 99% min, ( 10 gm ) ( merck / lovibond / vwr chem ) 25 chloroform, analytical grade, dry solvent, water content: max 0.01%, ( 500 ml ) ( merck ) 26 morpholine acs, ( 500 ml ) ( merck ) 27 sodium thiosulphate pentahydrate ( 500 gm ) ( fisher scientific ) 28 acetic acid glacial, 500g ( merck ) 29 edta-disodium salt, 100g ( merck ) 30 cupric sulphate ( 100g ) ( merck ) 31 potassium chloroplatinate ( 1g ) 32 crystalline cobaltous chloride ( 50g ) 33 sodium hydroxide pallets ( 500g ) 34 murexide indicator ( 50g ) 35 activated carbon ( 500g ) 36 sodium chloride ( 500g ) 37 ammonia solution 25% 38 arsenic test kit, method : colorimetric with test strips and reagent ( contains malonic acid ) , 0.005-0.010-0.025-0.05-0.10-0.25-0.50 mg / l as ( 100 test ) ( merck ) 39 burrette ( 50ml ) ( borosil ) 40 distill water washing bottle 41 cotton ( big ) 42 brown paper 43 washing tray 44 gloves ( cotton ) 45 beaker ( 250ml ) 46 apron 47 micropipette with tips ( 1ml ) ( tarson / eppendorf ) 48 quartz cuvette ( 10mm ) for uv spectrophotometer 49 pipette ( 1ml ) ( borosil ) 50 pipette ( 2ml ) ( borosil ) 51 pipette ( 5ml ) ( borosil ) 52 pipette ( 10ml ) ( borosil ) 53 pipette ( 25ml ) ( borosil ) 54 5 ml volumetric flask ( borosil ) 55 50 ml volumetric flask ( borosil ) 56 100 ml volumetric flask ( borosil ) 57 100 ml measuring cylinder ( borosil ) 58 250 ml measuring cylinder ( borosil ) 59 small brush for bottle wash 60 big brush for bottle wash 61 ph digital meter stand