procurement of chemicals and consumables , glassware etc . required for smooth running of the laboratories under malda arsenic area water supply division :-1 chromogenic coliform agar, for simulteneous determination & count of escherichia coli and total coliforms in water samples as per iso 9308-1:2014, 100 gm pack merck / himedia. 2 consurnabies for bacteriological analysis by mf technique, membrane filter- cellulose nitrate, sterile- individually packed, white membrane, gridded, 47mrn dia, 0.45 micron porosity, pack of 100 circles merckihimedia / axiva. 3 consumables for bacteriological analysis by mf technique, radiation sterile plate 15x60 mm, 250 nos a pack 4 conductivity standard 1413 us / cm @25 degcfor calibration protocol of inolab conductivity meter ( 480mi / pack ) 5 dpd tablet for residual chlorine, easily dispersible, suitable for comparometric determination, pack of 250 tabs 6 edta n / 50 solution ( 500ml ) , q37395 for total hardness analysis 7 supply of ammonia buffer solution for total hardness analysis ( 500ml / pack ) , make:merck / fisher / sigma / finar 8 eriochrome black t indicator for total hardness analysis ( 500mlfpack ) ( 25gmfpack ) make: mercklfisherlsigmalfinar 9 triethanolamine min. 99.50% for total hardness analysis ( 500mlfpack ) 500 ml pack make: nmercklfisherls igmalfinar 10 turbidity standard solution for tb 210ir, make: lovibond 11 ph standard buffer colour coded solution 4.01, calibrated against certified buffer, 480 ml 12 ph standard buffer colour coded solution 7.00, calibrated against certified buffer, 480 ml 13 ph standard buffer colour coded solution 10.01, calibrated against certified buffer, 480 ml 14 ph paper with colour scale range 2-10.5 , 100 test strips / pack 15 reagent suitable for spectrophotometric analysis of iron in potable water, range 0.02-3.00 mg / l soluble iron ( 1000 tests / pack ) make: merck / lovibond / palin / wtw 16 iron standard solution , 1000 ml / l traceable to srmform, nist trassable ( 125ml / pack ) make: inorg venture / reagecon / mearck / sigma 17 reagent suitable for spectrophotometric analysis of manganese in potable water range: 0.1-10 mg / l of manganese, ( 250tests / pack ) make: merck / lovibond / palin / wtw 18 manganese standard solution , 125 ml 19 supply of hydrochloric acid min: 36.5%, analytical quality & acs grade, arsenic content: 0.01 ppm max. ( 500ml / pack ) make: merck / fisher / sigma / finar 20 supply of potassium iodide analytical quality ( 100gm / pack ) assay: min. 99.8%, make: merck / fisher / sigma / finar 21 supply of tin ( ii ) chloride dihydrate analytical quality solubility: 10% solution in dil. hcl should be clear & assay: min. 99.00%, ( 100gm / pack ) , make: merck / fisher / sigma / finar 22 lead ( ii ) acetate trihydrate, assay: min 99% ( 500gm / pack ) 23 zinc granules ( arsenic free, as content 0.00001% max, 500mg / pack ) make merck fishier sigma 24 silver diethyl dithio-carbamate for analysis, 5gm. acs grade-assay:99% min ( 5 gm / pack ) make: merck / sigma 25 morpholine ( 500ml ) 26 supply of chloroform analytical quantity, dry solvent, water content maximum 0.01% max ( 500 ml / pack ) merck / fisher / sigma / finar 27 arsenic standard solution traceable to srm 1000 mg / i as , nisttraceable ( 125 ml / pack ) 28 acetone lab grade ( 5ooml / pack ) make: merck / fisherysigma / finar 29 sterilising ether solvent ( biosol ) ( 4s0mgpack ) 30 supply of extran / labolene / finklin neutral ph ( 5l / pack ) make: merck / fisher / finar 31 hydrochloric acid laboratory grade ( 5 lit ) pack iron content: 0.0001% max, make: merck / fisher / finar 32 nitric acid about 69%, analytical quality, 500 ml, merck / fisher / aventor 33 sodium thiosulphate pentahydrate ( 500gm / pack ) make merck / fisher / sigma / finar 34 aluminium foil paper roll 35 tissue rolls ( medium ) - 2x21 mt 36 volumetric flask 1000 ml 37 dropper glass 38 funnel 3 39 glass petri dish 80 x 17 mm ( with top & bottom ) 40 ldpe sample collection bottle, with screw cap, 100 ml 41 ldpe sample collection bottle 200 ml 42 arsenic generator 100ml complete with glass wool adaptor, absorber tube for arsenic testing & complete with 5 ml volumetric apparatus, borosilicate glass & with all matching standard-joints 43 sterile sample bottle ( tarsons ) sterilized disposible bottle for sample collection container ( 100 ml ) 44 tarsons hands on blue nitrile ( gloves ) ( 100 pieces / pack )